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Any exhaust down at engine level or lower will definitely get at LEAST some steam. I would send an Email to Chris at EFIsystempro. Sorry for the late reply. Also in Tools, Shop Equipment & Chemicals, Cataclean - Fuel and Exhaust System Cleaner, Cataclean Diesel - Fuel and Exhaust System Cleaner, Distribution Blocks, Filters, Adapters and Fittings, Microswitch and Solenoid Mounting Brackets, Holley EFI CAN to USB Dongle - Communication Cable, Hooker BlackHeart Oxygen Sensor O2 Bung 2.5" Clamp-On Style, Holley EFI Terminator X Wideband Adapter Harness, Earl's Oxygen Sensor Weld Fitting (Weld Bung) - Steel. Aug 17, 2013. Get fast, Free Standard Shipping on orders over Summit Racing Equipment from $99 -- no shipping, handling, or rural fees! By Joshua C on August 10, 2021 | Verified Owner, Worked right out of the box. Found out that it was due to rfi/emi. 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. YES! Yes, this is going to be an added expense, however, it will help guarantee your success. After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. What I installed on the motors was the Holley HP 19lb Holley Injectors the Holley 522-198 duel sync distributors with the MSD Digital 6A and the MSD Blaster 2 coils. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . Holley Sniper EFI System is Easy, Budget-Friendly Path to Fuel WBO2 Sensor 17025 Bosch 554-155 Holley - EFISystemPro.com Oxygen Sensor, Replacement, Sniper EFI, Terminator X, 3-wire, Thread-in, Each See More Specifications | Check the Fit. $5 Off Your $100 Mobile App Purchase . I'm 3" down from the bottom of the flange to center of bung. Fortunately, it turns out there are some options. When the Sniper EFI System received USCG approval at the end of 2018 this presented some hope for boat owners. Staff Writer. Part# 50-5009QFT. so simple check first, whats the fuel pressure? Part# 554-155. This really applies to any O2 sensor regardless of EFI system. A forum community dedicated to performance boat owners and enthusiasts. The spark must be manually tuned. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. You have to angle it to help the throttle cable get around the booster. I have a boat with twin 3.7 Mercruisers. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . the engine not running. Thanks for that, Danny. #1. It is possible for the ECU to have an internal failure that can kill O2 sensors. Anti-Seize pre-applied to sensor threads. Welding in an O2 Sensor Bung for a Holley Sniper EFI System I have a 74 bronco, 302, mild cam. When either of these operating temperature ranges is exceeded, the sensor can no longer be . These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. Maybe my manifolds leaked the inside between the snail and the log?? On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. I had an injector fail after a month of running and called the tech line who helped me figure that out. It flows 850 cfm and can support up to 650 horsepower. May God's grace bless you in the Lord Jesus Christ. Full product line and accessories at excellent pricing. Sep 14, 2021. To simplify . Also the progressive link. You need to intimately know the system you are using, its capabilities and limitations, install it correctly and have it tuned with someone with experience specific to marine applications. Howell indicates that this adapter was designed for the Chevy type Mercruiser manifold but that it should work on any similar marine wet manifold. Sniper EFI Installation Guide. You really want a bigger engine. When problem-solving this type of issue, consider when and how you could use a work-around. I wouldn't say "never", but the last time I asked that specific question I was told it wasn't anywhere on the horizon. 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. Some logs have water up to just short of the port. Thanks guys. Well an update on the Sniper install. Each engine has the Holley marine 2 barrel carburetor. 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. Then dialed back the cranking fuel quite a bit and that seemed to help some, but still having ongoing issues. Taipei has dozens of world-class restaurants where gourmets can sample the most authentic Chinese cuisines. 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. It could be an instant fix. I have searched thru the forum as much as I can, with not much luck. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . Do you recommend in-tank or external fuel pump? With over the transoms you might get away with it if the water is introduced at the very very end, and the O2 is mounted right at the log. While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. $108.95. The new Exhaust manifolds will have wideband O2 bungs for tuning. May 19, 2021. O2 sensor placement is critical for getting your engine to read the oxygen in the exhaust correctly and can directly impact the performance of your new EFI installation. It should be pretty straight forward what each of these values do. What I don't want to do is spend more money on the headers than on the fuel injection upgrade and new propeller set. When buying the Holley Sniper EFI kit, you've got two basic options. Followed all the instructions to the letter. Is the O2 sensor on the dyno must have a very long pipe extending past where it is positioned or backwash from the room air will violate the readings as well as any header leaks. 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. Thanks. John 1:5, 1969 FJ40 2F with Holley Sniper EFI, Power Disk Brakes Front & Rear, Downey, Your post has peaked my curiosity. YES! In the event you decided earlier that you are going with the Sniper EFI System you will not have the requisite tuning capability by simply using the included handheld tuner. Installed the sniper/MSD combo on my mildly built 460 KEM. The adapter plate installs in between the exhaust manifold and the riser/elbow allowing for the water jackets to still be in place and an o2 sensor to be installed in the still dry exhaust gasses. The throttle body has a built in fuel pressure regulator set at 58.5 psi. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. #HM206 - ADAPTOR, O2 SENSOR for Marine use - Howell EFI Conversion 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. This Video Shows Ideal O2 Sensor Placement! Super helpful and knowledgeable. EFI Systems based on Holley's world-class Dominator and HP ECU's. Oxygen sensor: It's perfectly OK to share narrow band oxygen sensors with the stock ECU. I installed it without O2 sensor, adjust on the fly. Welcome to ClassicBroncos! Aftermarket headers are pretty much the only safe way to run an O2 sensor. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! It would cost considerably more but a second option that would have added performance benefits would be to switch to a dry manifld such as the headers available from Custom Marine, Inc. When it did keep running, the headers all started to smoke. Holley Sniper O2 sensor replacement - Club Cobra Bolt-on carburetor style EFI for your classic car or truck. Q3. The Sniper EFI throttle-body drops in place of your . 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. Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. My spare "Bosch O2 Sensor" came from eBay & was half the price of anywhere else I found. Has anyone run an O2 sensor in an EFI on a marine engine? Stock manifolds? Douglas Cline. #3. The clamp-on that came with mine wasnt a good fit on my 2" pipe. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. Yes! . Conditions when closed loop o2 should be turned off. Advertising . EFI System Pro had everything I needed for my EFI upgrade. I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. Next, the new unit was installed onto the manifold. If you find that please let us know. 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. You'll also notice that the firing order is 1-6-5-4-3-2. Posted By : / actual instructions in flowcharting are represented in /; Under :nose exercise before and afternose exercise before and after Menu. Parts List: 1) Holley Sniper 2300 EFI Kit (Do not buy the kit with fuel lines and pump etc. Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. The Holley Super Sniper High Performance EFI kit comes with a coolant temperature sensor and an O2 sensor, both of which must be used for the EFI to work properly. Thinking about this I think this will work very fine! In Stock. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. JavaScript is disabled. -- I particularly like the Daytona Sensors Approach to the Ignition Curve.- Are you pursuing Coast Guard Certification for the Sniper_EFi? I stopped by Bergeron on my way back to the lake, and he said they have never found a good way to run O2 sensors in a marine exhaust. In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. Sniper EFI Quadrajet Marine. The in tank pump is quieter, will normally run cooler and should last longer. Find a lower price anywhere and we'll beat it by 5%! My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. I am a competent mechanic and I have checked all the usual suspect items. The fuel module is self contained with water jacket cooling and contains the low and high pressure pumps. Is this a viable upgrade for my boat? In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! Initial Calibration in Basic Configuration. 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. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. 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.).