Sort. And the relay and fuse were mounted along the firewall. CTS (Coolant Temperature Sensor) - Reads engine temperature. The ones in the Bosch box come without warranty. Yes! Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. When it did keep running, the headers all started to smoke. The original Holley Sniper instructions are available on the Holley website if you have misplaced them. One example of a direction could be an adjustable timed delay-on injector-power relay in the injector power feed wire, delaying 1-second after key-on or whatever is necessary to bypass the prime shot time, only. Some of the landlubbers who are reading this may not realize that many inboard engines utilize what is called a wet exhaust, pushing the water from the engine block into the exhaust and then back into the lake/river/sea on which they float. In the case of the car, you can generally get out and walk (run?) running holley sniper without o2 sensor - plural.works Installing MegaSquirt in Parallel With the Stock ECU Is Holley working on a complete marine package or planning to in the future? excessively rich mixtures), Mechanical shock (e.g. non biased Shelby Cobra related site! Please consult the Holley Sniper full manual and use this guide for supplemental clarification. With a bad TPS you will have to manually prime to try and get it . Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? No one cares about your buddies old antiquated garden hose technology. Everyone raving about customer service is telling the truth! 3. Do you offer a USCG fuel pump kit? Add to Cart . Had to replace the oxygen sensor on my car for the terminator x after the original one failed and this fixed all my problems. Thanks. Could show a lean condition when in fact it really isn't. JavaScript is disabled. Holley EFI Usb/Can Harness, Sniper Tbi. 92 YJ 4.0, AX-15 5spd, np231, dana 30 front, dana 35 rear. Any exhaust down at engine level or lower will definitely get at LEAST some steam. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . Price Point: $$$. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. Well an update on the Sniper install. Taipei has dozens of world-class restaurants where gourmets can sample the most authentic Chinese cuisines. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. Now the lower cost Holley Sniper advertised for March 31 2016. Stock manifolds? Holley sniper help!!!! | ClassicBroncos.com Forum Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. Ran about 5 seconds and died. $119.95. No worse than taking the reading in the intake manifold cross over. Wideband Realities: The Truth About Oxygen Sensors - EngineLabs My spare "Bosch O2 Sensor" came from eBay & was half the price of anywhere else I found. Holley EFI 554-155 Holley EFI Oxygen Sensor HP comes from torque and rpm and rpm breaks things and increases wear. Sent unit back to Holley. This combines the Sniper EFI Self Learning Throttle Body, with an easy to install In-Tank Retrofit Returnless Module, 20 ft of Earl's Vapor Guard Fuel Hose, and the required fittings. Also the progressive link. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Ordered another dominator Bosch from Holley and it matches perfect. That is defacto step one in trouble shooting fuel injection systems. I installed one also on mercruiser 260 hp. 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. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. 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. How To Properly Place and Install an O2 Sensor - Holley About your only location is in that short area from the log to the port face. Got a picture? Do you recommend in-tank or external fuel pump? 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, Incense-veiled temples with exquisite carvings and paintings dating back to dynastic times blend seamlessly in streets of the modern city. A replacement clamp on would be an easy change out. Holley Sniper first start No o2 sensor - YouTube Are you holding your RPMs back with the MSD for some reason? So far so good. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . you don't want to read that loss. 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 was mocking it up at the time. Followed all the instructions to the letter. Holley part number 554-155. Plug-And-Play Compatible with Holley Sniper EFI System, Only for applications that use a Bosch LSU 4.9 0 258 017 025 (17025) Wideband O2 Sensor, Particulates, carbon (e.g. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Staff Writer. From time to time we receive phone calls from individuals who are interested in converting their carbureted boat motor to fuel injection. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? Part # 554-155. By Joshua C on August 10, 2021 | Verified Owner, Worked right out of the box. Replaced and gapped to .45 all spark plugs. He also explains how to properly install them. 10 min read Video. Capability Range: Professional . But this also makes me wonder what you did for the O2 sensor. The Sniper EFI master kit contains the most complete EFI fuel system on the market. May 19, 2021. Part# 550-511. Engine Startup Tuning for Sniper and Terminator X Stealth Owners Capability Range: Advanced However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. 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. Advanced throttle body injection systems capable of transmission control and more. Part Number: 510-554-155. An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. Stay up to date with the latest releases, events, promotions and more. Q1. 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. Have engine apart and head checked and cleaned at machine shop. 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 not had it on the dyno with the sniper, but would guess probably about 400 to 410 hp and well over 500 tq.I did use the holley pump that came with the sniper. 100% identical. I installed the adapter and elbow so it's at an angle above the entry point. 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. Super helpful and knowledgeable. But you've found the right one for your Holley Sniper EFI System OR your Terminator X EFI System. I am just now ready to do the tuning this weekend. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. $132.95. I have searched thru the forum as much as I can, with not much luck. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. Stay up to date with the latest releases, events, promotions and more. RPM going up and down , miss firing and backfiring. Replaced O2 sensor but continued to have AFR issues running too rich. . PDF Holley Sniper Installation Supplement It does this every time..when you start a warmed up engine, its too rich and starts poorly without throttle. Holley Sniper EFI Oxygen Sensors 554-155 - Summit Racing Equipment This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. It works great where its at. The wiring was a bit of a mess. Capability Range: Advanced Holley sniper issues - 1969-70 Technical Forum - 69stang.com and Sensors: Fitting: Threaded O2 . In this case, the prime shot is good for cold, but too much for warm. Holley EFI Oxygen Sensor. I will let you know what happens. Maybe this one has a shorter cable? *Possible delays due to Covid-19 click for more information. EFI EFI kit electronic fuel injection. Full time feedback from the sensor is what the computer uses to refine the fuel table. https://www.efisystempro.com/efi-pro-hangout/sniper-installation-tips-holley-tom-kise, https://www.efisystempro.com/efi-prng-engine-startup-sniper-terminator-x-stealth. But you have to get it tuned. Is this a good upgrade? I've seen O2 sensors in water jacketed headers that have worked fine for years. Hooker BlackHeart Oxygen Sensor O2 Bung 2.25" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 2.5" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 3.0" Clamp-On Style, Holley Oxygen Sensor O2 Bung Weld-In Style. He had one there that was run on a dyno then the fuel map was set and shipped back. Bolt on 4150 Flange Carburetor Replacement. You'll also notice that the firing order is 1-6-5-4-3-2. That's great--we look forward to your results! 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. 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. Still needs a EFI pump and return line. 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. This runs in the area of $1000 and has everything you need for a basic install on almost any vehicle equipped with a four barrel carb. -- I particularly like the Daytona Sensors Approach to the Ignition Curve.- Are you pursuing Coast Guard Certification for the Sniper_EFi? There are drawbacks to that (as your tuner can explain in more detail) but it is doable, provided the system is correctly tuned initially. This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. suspect bad o2 sensor with Holley efi | Yellow Bullet Forums Also some tips on preventing O2 sensor damage Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: 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. Everyone else was backordered several months. (probably with the edelbrock marine 2506 intake). Restore | Make | Philosophize | Eat | Drink | Be Happy | Let's Go Brandon! Price Point: $$$. To take advantage of all the site features, please take a moment to register. Sniper EFI Quadrajet Marine. WBO2 Sensor 17025 Bosch 554-155 Holley - EFISystemPro.com I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. Some logs have water up to just short of the port.