running holley sniper without o2 sensor

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CUSTOM ART FOR CUSTOM NEEDS. I thought the clamp on style mount was a good idea in case the threads got buggered up when a sensor change might occur, and the threads are rusted up by then. You have to angle it to help the throttle cable get around the booster. Install the throttle linkage to the Sniper EFI throttle body. . Add to Cart . I mounted it here attempting to protect it from the deep water I play in and from lots of branches I encounter. The sniper fit perfectly on the intake. The Sniper EFI master kit contains the most complete EFI fuel system on the market. 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)? A forum community dedicated to performance boat owners and enthusiasts. functioning controller during engine operation. Can more detail be provided? The O2 sensor burned out immediately. It will crank and run great for 2-15 seconds then die. There is no problem getting this tuned and then running open loop. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. I myself will convert my 2 302's (Volvo Penta 5.0 l AQ231A) from carbs to EFI; I must find out everything before I start work on the engines, then I am satisfied to start. 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. A third option would be to run your EFI system without an O2 sensor at all. KAYAK searches hundreds of travel sites to help you find and book the hotel deal at O2 Hotel Taipei Main Station that suits you best. Free ground shipping regardless of order size! Introducing Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. I recommend popping for the Master . Newer ECMs have all the options to configure these functions. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! Everything about the fuel prime shot can be adjusted. When buying the Holley Sniper EFI kit, you've got two basic options. Most water jacketed header manufacturers (Lightning, CMI, etc) will install 02 bungs in their headers for extra money. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. blue doberman puppies. On a side note: Im getting 4200 rpms at 5000 elevation with stock heads. Sort. OP, the Edelbrock system looks to use the same basic sensors as the Holley sniper system: TPS, MAP and O2, plus a few supporting sensors. 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 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. I have a boat with twin 3.7 Mercruisers. Why? Put an end to cold start issues, hesitations, vapor . Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. $132.95. Thanks guys. Jun 7, 2021. looking at doing the same. Waiting for spring to put back together. 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 purchased the Holley HP MPFI system and went to the lake with it. *Possible delays due to Covid-19 click for more information. 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. the engine not running. 1985 fj60 (sold back to Toyota), 1997 fzj80, 1971 fj40 with 75 2F. On EFI systems such as Holley's Sniper, all of the EFI sensors (except for the O2 and coolant temperature sender) are mounted snuggly in the throttle body. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . Dec 28, 2016. The in tank pump is quieter, will normally run cooler and should last longer. non biased Shelby Cobra related site! This fixed the high throttle position sensor reading (TPS) of above 1% that likely caused my idle issues. I installed the adapter and elbow so it's at an angle above the entry point. I want to register an account for free right now! Holley's self learning system is a blessing and a curse. Maybe my manifolds leaked the inside between the snail and the log?? This requires a considerable additional investment but as long as you're doing things you're not going to do them half-way, right? Posted By : / actual instructions in flowcharting are represented in /; Under :nose exercise before and afternose exercise before and after I installed it without O2 sensor, adjust on the fly. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . The boat underway acts very much like a water brake dyno I strongly believe that a well broken in engine in good condition can stand a much more critical tune w/o issues and deliver almost the same fuel economy as the proposed EFI conversion. The new Exhaust manifolds will have wideband O2 bungs for tuning. Ordered another dominator Bosch from Holley and it matches perfect. O2 Sensor Mounting: The O2 needs to be mounted 6-8" after the merge in the header collector. The truck started fine after install, and ran down the road ok. After some time, the truck will not start after it comes to operating temperature. Joe, where did you end up installing the o2 sensor on your setup? If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. 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. Thanks for the compliment--we look forward to your feedback! Register now for free!) Replacement Sniper and Terminator X O2 Sensor, This part is legal for sale or use on Racing Use Only Vehicles. This really applies to any O2 sensor regardless of EFI system. When I went to Holley HP, I found an adapter by Innovate that is designed to draw air out the exhaust stream and away to the O2 sensor. There are five significant plug connections to make from the throttle body: Plug into the oxygen sensor. If the indicator reads "LOW Err" double check the connection to the CTS. Other? One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . Pay close attention to the instructions on O2 sensor placement. 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. Otherwise I have to check for a place in my gasoline tank to put the lines in. Was told by holley tech support to make adjustments to the fuel prime percent and multiplier settings, played with those with no major improvement. The fuel module is self contained with water jacket cooling and contains the low and high pressure pumps. Are you running the entire system? Categories. Thanks for the feedback on this adapter, Donald. 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. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. I didn't read all this, but yes, the EFI system can be run without a WBO2 sensor. See Details. He had one there that was run on a dyno then the fuel map was set and shipped back. Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish. 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. Seems to have more low end tq and is much smoother power through out the rpm range. 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. Just a rumor. George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Be sure to disable autotune and remove the O2 sensor before it dies. I was mocking it up at the time. 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. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. Add to Cart . After discussing it in this thread and talking with Holley's tech support, I decided . Looking for some advice pertaining to Holley Sniper and Tire Size upgrades. so simple check first, whats the fuel pressure? They are about 4 inches long, in-line between the log and manifold. Wiring the Holley Sniper EFI system is equally easy. Can anyone share their experiences with this type of setup? Sniper EFI 4500 Marine. That is defacto step one in trouble shooting fuel injection systems. Let me know how I can be of assistance. I will let you know what happens. Great Article. Distributor and ignition box? Holley EFI Oxygen Sensor. Systems that were already designed for marine efi. I received my replacement TPS and O2 sensor. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. Holley EFI has the solutions you need to get your project up and running better than ever! As far as spark control, the Sniper will let you tune those 4 points, nothing else will. Please consult the Holley Sniper full manual and use this guide for supplemental clarification. In the case of the car, you can generally get out and walk (run?) (If I am incorrect I heartily invite your comment at the bottom of this article!) Tech Resources. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. Increasing efficiency is always a good idea. 2023 Holley Performance Products, Inc. All Rights Reserved. Do you recommend in-tank or external fuel pump? 5. As far as a sensor goes, absolutely nothing. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. 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. Capability Range: Advanced I installed a Holley sniper system on my car and I've been fighting it for 2 weeks now. I have a 74 bronco, 302, mild cam. This free oxygen is picked up by the O 2 sensor and determined to be indicative of a lean AFR condition when, in reality, the engine could potentially be running slightly rich. EFI EFI kit electronic fuel injection. Here is one on start up tuning. An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. so mine has been pretty good but 1 out 20 starts you can hear the fuel pump run longer then normal..when it does that it will light off then diebut if i put my foot to the floor it will start..still working on that 1..timing i am running 12 cranking.20 idle.40 cruze.35 wotstill playing with all of this..Mine is also a sniper stealth. Having the same problem with my sniper as well, intermittent hot (and cold) start issues.

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