functioning controller during engine operation. He also explains how to properly install them. Sniper EFI Quadrajet Marine. I installed a holley sniper kit. Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. That is defacto step one in trouble shooting fuel injection systems. You have to one big hole in the riser, then you reach the cooling water, and one little hole in the next part of metal: now you reach the exhaust gasses. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. AFR was 19 area. Bosch 17025 Oxygen Sensor #1 Best Seller . Greatest struggle is the shift interrupt. Otherwise I have to check for a place in my gasoline tank to put the lines in. I am happy with Holleys no hassle replacement of the parts. As far as packaging goes, one comes in a Bosch box, the other in a Holley package. 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. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. Who knows. It flows 850 cfm and can support up to 650 horsepower. 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. From there, our highly trained factory refurbish technicians flow the original fuel injectors. #1. The fuel lines and fittings are 3/8s with 8AN fittings and everything on the 60 requires 5/16 fuel line with 6AN fittings) Holley Sniper EFI 550-849 Holley Sniper EFI 2300 Self-Tuning Kit - Shiny Finish. Not always the case with a boat. Part Number: 510-554-155. so simple check first, whats the fuel pressure? 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. I would back-burner the ignition control questions until you get the fuel injection working. It flows 850 cfm and can support up to 650 horsepower. 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. Sniper EFI Releases new Stealth 4150 Models! Apr 13, 2017. with the extension. George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Affiliate. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . Followed all the instructions to the letter. It will not fit on round or oval risers without a suitable flat area. 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. Brand: Holley EFI Emission Code: 5: Material: . Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. I do believe that the Holley EFI ECU's have the capability to be programmed to work in this application, but have not yet found anyone who has tackled this task and been fully successful.If you (or anyone else) does make some progress on this, please reply here and let us know what works. Capability Range: Moderate What motor is this on? looking at doing the same. CUSTOM ART FOR CUSTOM NEEDS. The O2 sensor burned out immediately. Parts List: 1) Holley Sniper 2300 EFI Kit (Do not buy the kit with fuel lines and pump etc. holley efi. I'm 3" down from the bottom of the flange to center of bung. Yellow Init In First shown for an instant when the system is powered on. p.s. You should then have at least 18-24" of pipe after the sensor. 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. There are drawbacks to that (as your tuner can explain in more detail) but it is doable, provided the system is correctly tuned initially. Have engine apart and head checked and cleaned at machine shop. With a bad TPS you will have to manually prime to try and get it . 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. Found out that it was due to rfi/emi. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? Sorry for the late reply. The fuel pump question is the tough one. Put an end to cold start issues, hesitations, vapor . Did a test startup on my new sniper by running the power wire to battery + and not using the o2 sensor.I also capped off the regulated return line with a hose, clamps, and chamfering bit.In the settings I chose closed loop disabled (set to open loop) and also set learn mode to disabled. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). Advanced throttle body injection systems capable of transmission control and more. Holley EFI has the solutions you need to get your project up and running better than ever! I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. Idle and off-idle performance (particularly as the engine goes into gear.) In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! Look at the bottom.. Holley EFI has the solutions you need to get your project up and running better than ever! Installed a Lokar throttle linkage bracket custom made for the Sniper, removing the old one that had been on my Holley 750. My bet based on longer pump run, to make pressure, you have a leaking injector. Specs. Not sure how well the sensor likes being that close to the port. To take advantage of all the site features, please take a moment to register. - Do you know of a Carburetor Builder who has addressed the Coast Guard certification issues with the Sniper EFI? quick fuel. Everyone else was backordered several months. Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. John 1:5, 1969 FJ40 2F with Holley Sniper EFI, Power Disk Brakes Front & Rear, Downey, Your post has peaked my curiosity. But you've found the right one for your Holley Sniper EFI System OR your Terminator X EFI System. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. Thanks for the compliment--we look forward to your feedback! Initially I was looking for the upgrade to a 4V holley 4175 carb, but this option has peaked my interest. I really dont want any issues on the whitewater lol The very front would be the safest place. RPM going up and down , miss firing and backfiring. Menu. The adapter does require the removal of the manifold and some machining but it allows the O2 sensor to be placed into the exhaust flow but protects it from the water exiting the block. I mounted it here attempting to protect it from the deep water I play in and from lots of branches I encounter. Sep 14, 2021. $132.95. so far so good love the smooth power and easy starts. I'll let you know how it works out. Car runs perfect . 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 doesn't mean it can't be done. Part# 554-155. Innovate Motorsports HBX-1 Bung Extender. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. 3. Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. Throttle body mounted ECU - no extra boxes to mount. Will I be able to run both systems off of one fuel pump? The plan is to 'learn' a fuel\Timing curve with a closed loop. Holley 554-100 NTK Wideband Oxygen Sensor. Everything about the fuel prime shot can be adjusted. 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. Restore or update your Holley Sniper EFI System with this WBO2 Sensor 17025 Bosch 554-155 Holley. Doesn't look like it will have an O2 sensor. 2. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. If you have long tube headers, mount the sensor approximately 6-10" after the collector. 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. 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. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. The original Holley Sniper instructions are available on the Holley website if you have misplaced them. If he wants to run in closed loop and have the system adapting to conditions at all times, the minute he fouls he is dead in the water. Warranty Information. 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. Prime cannot be adjusted on this old unit. I have a 74 bronco, 302, mild cam. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. You have to angle it to help the throttle cable get around the booster. He is a wizard, might be able to give you some pointers, will ask you what version of the software you are on, whether you're running the progressive adjustable linkage, etc. http://s621.photobucket.com/albums/tt291/Mark11530/?action=view¤t=MAH05771.mp4, http://www.holley.com/data/Products/Technical/199R10226.pdf. . The target A/F value based on load or MAF cfm, and engine speed. 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. Most of Holley's EFI systems provide a Setup Wizard that builds a base configuration file that allows you to start the engine and operate the vehicle. My boat is still in winter storage. 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. JavaScript is disabled. 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.) . If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. I wouldn't say "never", but the last time I asked that specific question I was told it wasn't anywhere on the horizon. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Capability Range: Moderate It may not display this or other websites correctly. The Tech Tips and discussions are also great! Do you understand that no USCG-approved aftermarket EFI fuel system (including fuel pump, lines, filters, adapters, and hose ends) exists, that installing unapproved components on a boat will make the boat out-of-compliance with USCG regulation and could result in financial loss and legal liability (and that you release us from any liability by proceeding)? I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. Install the throttle linkage to the Sniper EFI throttle body. Sniper EFI Installation Guide. 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. away. 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. 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. We also use content and scripts from third parties that may use tracking technologies. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. I received my replacement TPS and O2 sensor. In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. Next, the new unit was installed onto the manifold. 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.