Most of you only need to tune 4 points, idling around the marina, part throttle - pulling the rope tight, 1/2-3/4 throttle - cruise, and YeeHaa - WOT. I have a 74 bronco, 302, mild cam. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Follow USCG rules about materials and fittings. holley sniper efi Holley Sniper EFI Self-Tuning Master Kit - Black Ceramic Finish $1,475.95 Part# 550-511K holley efi 100 PSI Stainless Pressure Sensor $155.95 Part# 554-102 Are you waiting to convert your carbureted vehicle to Sniper EFI, but don't like the idea of mounting an external fuel pump? I installed a holley sniper kit. This is great information that can only get you closer to an ideal solution. : For registered members this ad will NOT show. is donald smith still alive; julie grant court tv cheerleader I wouldn't say "never", but the last time I asked that specific question I was told it wasn't anywhere on the horizon. You are using an out of date browser. Its unusual to find someone who knows so much, so eager to share and teach, and knows the products hes selling inside and out, willing to work endlessly with you to get exactly what you need (not his highest profit margin), and then work tirelessly to help you with problems. It's hallmark is its simplicity--but in this case it is also it's shortcoming. No matter what I do, it will not start. Please consult the Holley Sniper full manual and use this guide for supplemental clarification. so simple check first, whats the fuel pressure? It's fast, simple and absolutely free. I'm guessing by snail, that's another name for the riser? In Stock. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. Part # HM206. Ref: https://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/I heard of the new Sniper EFI from some chatter on OffshoreOnly.com. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. 10 min read. We also use content and scripts from third parties that may use tracking technologies. The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. The Sniper EFI master kit contains the most complete EFI fuel system on the market. I know from some of the other posts, there have been WBO2 sensor issues. I am in the middle of a repower of twin BBC 481, mild cam which will need to be recarbureted. I really dont want any issues on the whitewater lol Now the lower cost Holley Sniper advertised for March 31 2016. Still needs a EFI pump and return line. $108.95. HP comes from torque and rpm and rpm breaks things and increases wear. You are using an out of date browser. The O2 sensor burned out immediately. I will get a new 02 sensor before I swap back to the orange box. Look at the bottom.. Make sure to put anti seize on the threads. As a follow up, I ended up using an eBay type anti fouler elbow for the O2 sensor to try and get it out of the water in the manifolds. Holley Sniper EFI Wideband Oxygen Sensor Part Number: 510-554-155 Click image to zoom $125.99 More than 10 available Lowest Price Guarantee Sniper EFI Wideband Oxygen Sensor Replacement Part for Holley Sniper EFI and Terminator X Systems Bosch LSU 4.9 See more product details Free Shipping - Ships Today QTY Add To Cart Add to Wish List The Sniper needs a "clean" 12V wire that is hot in Start and Run. Restore | Make | Philosophize | Eat | Drink | Be Happy | Let's Go Brandon! Holley part number 554-155. $132.95. Went with around .525 lift, 270 duration on a 114 LSA and the car was sucking vacuum like a new hoover. #3. If there's anyone willing to read a bit and offer advice about what to do when doing a top-end swap (when you may be in a scenario with a new top-end that's the EFI isn't calibrated for AND you can't have an WBO2 sensor connected), please let me know. That sounds like one solution. Looking for some advice pertaining to Holley Sniper and Tire Size upgrades. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Price Point: $$$. I don't have enough experience with marine applications to know exactly what it will take to solve this. For gourmands, night markets not only offer scrumptious small . It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt. Mark Twain, The goal in life: To die young as late as possible. Fuel prices at the marina are usually about a dollar a gallon more than at the local Racetrac/Wawa/wherever, and even more if you wisely opt for ethanol-free fuel. The Sniper will do that. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. We can hear the initial fuel spray into the body, but it appears that its not enough to start the engine while hot. May 19, 2021. Bolt on 4150 Flange Carburetor Replacement. For the most part each engine wants a bit of its own timing set-up IMHO, you boat owners with a 270HP 350 (or any other config) may want 350HP but upgrading it to that level will reduce or eliminate reliability. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. An O2 sensor is used when converting an engine to fuel injection and wanting to move from an "open loop" system to a "closed loop" system. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. Thanks for the heads up. Apr 13, 2017. with the extension. Put an end to cold start issues, hesitations, vapor . This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. It works fine. I am a competent mechanic and I have checked all the usual suspect items. Here is one on start up tuning. EFI System Pro also has a good bit of tech info on their website. The in tank pump is quieter, will normally run cooler and should last longer. I have installed the Holley hp efi MPFI on my twin inboard mercruiser 350ci 270 hp. non biased Shelby Cobra related site! So I bought the progressive linkage but you then have . If I am reading your post correctly you are using two separate o2 sensors when using headers ? This is made by Innovate, the guy that runs the Holley EFI forum HIGHLY recomends AND uses them himself, I use them, my o2 on my wideband Innovate, kept going bad, a 4.2 Bosch o2, put this on both my Holley HP NTK sensor & the wide band, been 2 years now & lots of driving, all good, Heat-Sink Bung Extender (HBX-1) - P/N: 37290 The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. Sniper EFI Releases new Stealth 4150 Models! This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. Followed all the instructions to the letter. One of the benefits of using any Holley EFI system is that it self learns and tunes on its own. But you have to get it tuned. You really want a bigger engine. This requires removing the plug with a breaker bar, and using a 1/2 NPT to 3/8 NPT adapter to mount the Sniper sensor. May 1, 2018 They want you to angle it to keep it from fouling. Also the progressive link. Wiring the Holley Sniper EFI system is equally easy. Comes VERY complete.throttle cable bracket, kickdown bracket, base plate studs & nuts, heat shrink type connectors, and pretty decent instructions as well. The very basic fuel and spark tables are the limiting aspect, Holley does offer advanced software for more precise tuning. My first install was on a stock manifold and I installed it in about the same spot Steamer (above) did, except 180 degrees the other way, facing towards the front of the vehicle. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! The first option is to just buy the injector body and the controller with the wiring harness and sensors. The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. Attempted to make a parts run in my 1990 Third gen Chevy Camaro with a small block chevy 350 with flowmaster mufflers.I believed the issue in this video to b. If you let it cool down again, does it start up fine? 74 FJ40 confined to the swamp. It's a compact HP pump and cooler assembly. blue doberman puppies. I installed a holley sniper kit. Staff Writer. On a side note: Im getting 4200 rpms at 5000 elevation with stock heads. Sadly, no. Since the Sniper install, I encountered my second O2 sensor failure so I thought I would try the "Innovate Bung Extender" recommended by a few folks here. An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. I would back-burner the ignition control questions until you get the fuel injection working. The Holley Sniper system sells for $999.95, installs in under 2 hours, and requires only an O2 sensor, a temp sensor (both included), an electric return-style fuel pump, and four-wires to connect.. Quote Reply Topic: Holley Sniper Posted: Jan/05/2022 at 2:01pm . I purchased the Holley HP MPFI system and went to the lake with it. I am interested in upgrading both engines with Pertronix Ignitor or Ignitor II ignition and the Holley Sniper EFI 2300 and the Howell EFI marine O2 sensor adapter. Previously, none of Holley's throttle body injection (TBI) systems, such as the Terminator EFI were USCG approved (even though the HP and Dominaor ECU's themselves are.) I've been building a TBI system from GM parts to use on a 1987 Wellcraft with the Mercruiser 4 cylinder engine. Or maybe I could just use a piece of spare/junk exhaust tubing, and bolt it to the manifolds and add a weldless O2 bung to it. Holley EFI Oxygen Sensor. From there, our highly trained factory refurbish technicians flow the original fuel injectors. This is the 02 sensor adapter I used. THen you have to determine if you want 02 readings from one cylinder, or in the case you just mentioned mostly one cylinder, average of 4 cylinders on one bank or the other, or average of all 8 cylinders. Sniper EFI 4bbl Marine. Part# 554-155. holley efi. Q3. So please, If you have problems registering or can't log into your account, please. I have searched thru the forum as much as I can, with not much luck. Get fast, Free Standard Shipping on orders over Summit Racing Equipment from $99 -- no shipping, handling, or rural fees! Seemed to be getting too much fuel on hot starts and flooding out, could get it to go by putting it to the floor while cranking as Action mentioned. Your BluePrint Engine will be equipped with a Holley model 550-510, or 550-511 (identical except for finish color) on 4150 flanged intake manifolds. He had one there that was run on a dyno then the fuel map was set and shipped back. By bypassing the built in pressure regulator in the fuel module(allowing full flow and pressure), using 3/8 hard lines to/from the sniper to meet CG rules( no soft lines on the engine block)using the snipers fuel pressure regulator, This is as close as I can come to safe. Advertising . Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . Right now I'm just using the AEM Wideband sensor to monitor Air/Fuel ratio but hope to use it in an EFI system soon. The throttle body has a built in fuel pressure regulator set at 58.5 psi. Waiting for spring to put back together. Does an yone have a pic of the O2 sensor in their exhaust? If this is a first time effort, find a tuner in your area with marine experience. Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. Car runs perfect . Without Headers Steamers location (above) is perfect, up close to the engine where you have not lost much heat. After discussing it in this thread and talking with Holley's tech support, I decided . Oops, after that it cranked right up.Idle was set to 950rpm so after the vid was cut off I lowered it to 820rpm and it was purring like a kitten.EFI for dummies. For now I have a genuine bosch O2 and Standard Automotive TPS installed. Replaced and gapped to .45 all spark plugs. Price Point: $$$. Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. All I can say is it made a completely different motor out of the 460, 39 degrees out and starts within 2 revolutions power is super smooth throughout the rpm range (idle to 4100rpms 212 Hamilton with 4.0 turbo impeller) has about 6 hrs of learn time. They are the only ones got me a holley usb to can cable fast. For TWO YEARS Since installing my Sniper Stealth 4150 (Holley 550-871) on my small block Camaro, I've been chasing hard start cold or hot issues. Copyright 2022 Holley Performance Products, Inc. All right reserved. Hopefully this one lasts longer than the original. Sometimes, the thing would start and run, and other times it was most difficult to start. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Plug into the coolant temperature sensor. I am a competent mechanic and I have checked all the usual suspect items. It needs the tip pointed down at least 10 degrees from horizontal and at least 15 degrees from vertical I prefer about a 45 degree angle from horizontal. I also capped off the regulated return line with a hose, clamps, and chamfering bit. Do you offer a USCG fuel pump kit? Holley Sniper EFI Self-Tuning Kit - Shiny Finish, Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish, Holley Sniper EFI Self-Tuning Kit - Classic Gold Finish, Holley Sniper EFI 2300 Self-Tuning Kit - Shiny Finish, Holley Sniper EFI 2300 Self-Tuning Kit - Black Ceramic Finish, Holley Sniper EFI 2300 Self-Tuning Kit - Classic Gold Finish. I will keep the replacements as spares. One comes in the form of a Marine O2 Sensor Adapter from the folks at Howell EFI. All times are GMT-6. Then if you are do you just wire the o2 sensors in parallel or do these EFI kits have inputs for more than one sensor. Once you have those points set, the rest of the map doesn't really matter, just make it look smooth/pretty and everything will be fine. A third option would be to run your EFI system without an O2 sensor at all. It flows 850 cfm and can support up to 650 horsepower. Use a return fuel line. For a better experience, please enable JavaScript in your browser before proceeding. As far as warranty goes, Holley products are covered by a 90-day warranty against defect in material or workmanship. I have a 74 bronco, 302, mild cam. p.s. It appears that its a tuning issue. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Just a rumor. Are you running the latest software? 3. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. In order for it to work as designed the O2 sensor has to be installed in a dry exhaust system and needs to be placed 1-10in from the collector in the headers. This motor would probably turn the berk to 6 grand and blow it out from a stop.Motor dyno'd on a carb @389 hp @ 4700rpm and 497 tq @3500. AFR was 19 area. This really applies to any O2 sensor regardless of EFI system. Not always the case with a boat. It just means that if you are thinking you'll install this, crank it, and pull away from the dock with complete success you might be in for some disappointment. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. (If I am incorrect I heartily invite your comment at the bottom of this article!) I'm having new headers with an O2 sensor bung installed in my car ('79 Vette) soon, to prepare for a Holley Sniper EFI TBI install this winter. Ran about 5 seconds and died. The spark must be manually tuned. Yellow Cold! In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. Is this a good upgrade? The following vehicles are considered Racing Use Only Vehicles: Holley is the new standard in EFI! Full product line and accessories at excellent pricing. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. It does not look like anything particularly superior in concept. RPM going up and down , miss firing and backfiring. I have a 74 bronco, 302, mild cam. . As far as spark control, the Sniper will let you tune those 4 points, nothing else will. The original Holley Sniper instructions are available on the Holley website if you have misplaced them. . Marc, you don't mention which system you installed but the Holley systems are fully configurable. Find a lower price anywhere and we'll beat it by 5%! test the sensor.. for a basic pass/fail of the sensor. If it's working to prolong the life of the sensor in the AEM Wideband kit then there is no reason to believe it wouldn't work with any other sensor. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. Holley Oxygen Sensor O2 Bung Weld-In Style; Larger Image. Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery. you don't want to read that loss. Holley EFI Oxygen Sensor. Stock manifolds? Did you use the Holley fuel pump and have you had any issues with it? Jun 7, 2021. You shouldn't feel too bad about that lack of knowledge, because many boat owners either don't realize that the moisture present in their wet exhaust manifold will kill the wideband O2 sensor required by an EFI system. There are five significant plug connections to make from the throttle body: Plug into the oxygen sensor. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Your talking flames at that point, and it will definitely have an effect on the reading. pull the sensor out of the exhaust. Holley sent him a new one for free. It turns out that the loading generated a propeller in the water is significantly different than wheels on pavement, so much so that the map has to be tuned differently. Sensors: Fitting: Threaded O2 . Below are the most common sensor usages in a Holley EFI system, however pressure transducers can be applied to any form of pressure in an automotive system, from oil pressure, to exhaust back pressure, and the data gathering usages in racing can get quite creative. Thinking about this I think this will work very fine! 3. You'll also notice that the firing order is 1-6-5-4-3-2. And who can blame them? Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Wondering how you are progressing with this? George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Only show this user. Good luck to all. What I don't want to do is spend more money on the headers than on the fuel injection upgrade and new propeller set. You must log in or register to reply here. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. Initially I was looking for the upgrade to a 4V holley 4175 carb, but this option has peaked my interest. Capability Range: Professional With the sniper as long as you locate the o2 sensor where it gets good feedback and stays dry long enough to get a good tune you could lock it so even if the o2s get wet it still runs good. Everything is included to completely plumb your fuel system including; 20 feet of 3/8" EFI Hose, in-line fuel pump, post and pre fuel filters, return bulkhead, and all of the necessary fittings and hardware. OT pipes may be out of the question, but with the water dumps put in at the transom, ala Gil or Rewarder OT pipes, you could get dry readings with bungs a little above where they bolt onto the logs, I would think. Q2. I am just now ready to do the tuning this weekend. As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. And the relay and fuse were mounted along the firewall. $102.95. After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. The test run was great, they have never run so well even when they were new with carbs. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Since your existing low-pressure fuel system is not going to work with the Sniper EFI System this puts you in the unenviable position of choosing between USCG compliance or EFI. Can anyone share their experiences with this type of setup? Specs. 29. EFI Systems based on Holley's world-class Dominator and HP ECU's. Master ASE tech since 91. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. The problem occurs when an excessive amount of oxygen makes its way from the intake port directly into the exhaust at idle and low engine speeds because of overlap. The engines are rated at 170 hp each. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a "criss-cross" pattern (60-80 in.lbs.). Specs. quick fuel. EFI System Pro had everything I needed for my EFI upgrade. I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. Also some tips on preventing O2 sensor damage The wide band O2 sensor is required for initial running and calibration. Free ground shipping regardless of order size! The new throttle response was significant,fuel saving and gave me a turn key cold start.Still I can't have an idle speed under load and a turn key warm start. I have tried several different settings to get it going, no luck. Has anyone run an O2 sensor in an EFI on a marine engine? If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. It looks like another season has come and passed by without the answer you wanted on this.I am impressed that you made the leap into marine fuel injection but you have experienced the same problem that everyone else who has tried this has faced. Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. Tune the delay relay timing to just miss the prime shot.For cold starts, a simple push-button or switch "choke" override to power the relay during prime would provide it. I recommend popping for the Master . Much of the system is encased right inside the throttle bodyand that includes the ECU. i thought about it, but after $3400 on an EFI alone and an entirely new rigged boat Im having a hard time forking out another 2000 for an exhaust when I may just do an open loop My buddy machined up a set of spacers I sketched out for him. Holley sniper issue on newly rebuilt motor, Holley Sniper with Duraspark and timing control. The very front would be the safest place. Innovate Motorsports HBX-1 Bung Extender. I want to register an account for free right now! I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? The spark must be manually tuned. Super helpful and knowledgeable. This Video Shows Ideal O2 Sensor Placement! Oxygen sensor: It's perfectly OK to share narrow band oxygen sensors with the stock ECU. #1. It works great where its at. Add To Cart. I will keep the in-line pump for a spare. I think I could run more boost but it's a real hand full right now. Without the engine running, AFR will read 35.6 The fuel pump will run off a relay in the sniper harness (blue wire) pink wire gets switch/run power to the relay. I am looking for a TBI with full sensors, mainly atmospheric for Sept and Oct and a Idle Air sensor for warm starts.I welcome your thoughts.Regards, You have to angle it to help the throttle cable get around the booster. To those who have installed the Sniper EFI units, please post up some photos of where you tapped the exhaust line to install the Oxygen Sensor's weld bung. Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. I'm using the NTK sensor. Register now for free!) Find a lower price anywhere and we'll beat it by 5%! I installed the adapter and elbow so it's at an angle above the entry point. I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. The reason I say this is that nowhere in this discussion is the fact that none of these systems are are handling the timing on the fly. Fuel economy went from 12.5 to 13.5 gph to 10 gph. For the most part, the small harness is plug-and-play. Anti-Seize pre-applied to sensor threads. This fixed the high throttle position sensor reading (TPS) of above 1% that likely caused my idle issues. 10 min read Video. Taipei has dozens of world-class restaurants where gourmets can sample the most authentic Chinese cuisines. Hi all, i'm contemplating doing a sniper quadrajet swap onto my volvo penta 5.7 GL 2bbl holley motor in my 1997 cobalt 200 with the DP-S outdrive. But for just over $10 and two simple configuration changes you can switch to a progressive linkage that opens only the two primary barrels at first and then brings in the secondary barrels at a later point. So much it could be. I had questions on the suggested "Marine O2 Sensor Adapter" from Howell EFI (https://howellefi.com/product/adaptor-o2-sensor-for-marine-use/), but when I look to the pictures, I understand how it will work. If you're not running one (or if you are and the water has killed it) then it is not surprising that you are running rich. PRO's: Wideband O2 sensor harness is longer, allowing easier connection and routing. Most water jacketed header manufacturers (Lightning, CMI, etc) will install 02 bungs in their headers for extra money. functioning controller during engine operation. I didn't read all this, but yes, the EFI system can be run without a WBO2 sensor. CUSTOM ART FOR CUSTOM NEEDS. I will be calling around to see if I can find someone to help that has experience. Sniper EFI 2300 Marine. It may not be enough to cause problems with the way the engine runs aor even make into the cylinders, but it is enough of a mist to take out a O2 sensor. But you still risk a little water running back at low Rs. But this also makes me wonder what you did for the O2 sensor. I've dunked mine lots of times. 5. In Stock. Stay up to date with the latest releases, events, promotions and more. Sniper EFI Installation Guide. Affiliate. Description. This doesn't mean it can't be done. Homemade body parts replace the originals as they rot away but it's a 40 on the inside. By Joshua C on August 10, 2021 | Verified Owner, Worked right out of the box. The Fora platform includes forum software by XenForo. I would send an Email to Chris at EFIsystempro. USCG approval is certainly worth careful consideration, as being on a boat that catches on fire is even more serious than being in a car that catches on fire. . Still trying to find more info on electronic conversion, only found Pertronix replacement for points so far.. What TBI, fuel pump, sensors and ECM computer are you using? Greatest struggle is the shift interrupt. Emissions. Powering the Sniper, There are three wires that need to be connected to power on the Sniper, Red and Black main power wires, these need to be run directly to the battery and have a solid connection. Increasing efficiency is always a good idea. While this is extremely unlikely if you are having immediate, back-to-back O2 sensor failures you should make the effort to rule this out. Part# 554-155. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. A 90-degree V-6 has three shared crankpins set 120 degrees apart. . Part # 554-155. QFI-500 Oxygen Sensor. 534-199. Newer ECMs have all the options to configure these functions. Brand: Holley EFI Emission Code: 5: Material: . YES! If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. No one cares about your buddies old antiquated garden hose technology. I've installed several of these adaptive EFI's on cars with great success. For this you need a system that can be fully programmed to the extent of the Holley ECU's capability. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. For a better experience, please enable JavaScript in your browser before proceeding. I did--- Save your money and piece a fuel it together. The Holley Sniper EFI Quadrajet is a self-contained throttle-body injection system that's a direct replacement for spreadbore Quadrajet carburetors found on many classic GM vehicles. - You are currently viewing the forums as a GUEST.
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