Sniper EFI 4500 Marine. I installed a Holley sniper system on my car and I've been fighting it for 2 weeks now. It will flood itself out and won't start back, just crank and crank. I've seen O2 sensors in water jacketed headers that have worked fine for years. 5. Great Article. Sniper EFI 4bbl Marine. There is no problem getting this tuned and then running open loop. . Q2. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. Ive got a set of bassett headers for a BBC, ill see if they can fit under the transom. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. Wondering how you are progressing with this? The original Holley Sniper instructions are available on the Holley website if you have misplaced them. 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? My tune is coincidentally set at 11.5 desired afr, with the failed side as the leanest bank, but the ecu added 15% fuel anyways. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). The truck started fine after install, and ran down the road ok. Similarly, no multi-point fuel injection (MPFI) systems existed that were USCG approved. Good luck to all. 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. O2 sensor failure on a Holley Sniper EFI - YouTube Fortunately, it turns out there are some options. Categories. Wiring the Holley Sniper EFI system is equally easy. Holley EFI. The in tank pump is quieter, will normally run cooler and should last longer. While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. 3. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). I hope that the next F/2F header is more O2 sensor friendly. YES! 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. Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. Your talking flames at that point, and it will definitely have an effect on the reading. Part # 554-155. Yellow Cold! Installing MegaSquirt in Parallel With the Stock ECU I want to register an account for free right now! I am a competent mechanic and I have checked all the usual suspect items. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. Note, that is not a crack in the exhaust manifold, just a shadow from a casting flaw. That is defacto step one in trouble shooting fuel injection systems. Add to Cart . 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. You will still get some water on the engine side of the snails, mainly at low Rs. Holley EFI requires several pressure inputs in order to run an engine. Holley EFI Oxygen Sensor. O2 Hotel Taipei Main Station - KAYAK Pink switched power wire, this needs to be connected to a point that is 12V in run and while cranking. Holley Sniper - Oxygen Sensor Location | IH8MUD Forum Adam. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. It's a compact HP pump and cooler assembly. Has anyone run an O2 sensor in an EFI on a marine engine? Oxygen sensor: It's perfectly OK to share narrow band oxygen sensors with the stock ECU. 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)? Sniper EFI Releases new Stealth 4150 Models! 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. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. 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. 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. Explained: Holley EFI Sensors and What They Do I put mine after the collector only because I have a new exhaust and muffler going in and Ill use a weld in bung and placement will be different. 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. Yellow Init In First shown for an instant when the system is powered on. When problem-solving this type of issue, consider when and how you could use a work-around. Tech Resources. I recommend popping for the Master . I am just now ready to do the tuning this weekend. Copyright 2022 Holley Performance Products, Inc. All right reserved. Note that this is a different sensor than Holley uses for their Dominator/HP/Terminator/Avenger series. Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. #1. I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. $108.95. It does not look like anything particularly superior in concept. This is great information that can only get you closer to an ideal solution. Then operate open loop with a fuel map\Timing curve.I am interested in the capabilities of the Sniper product (4 injector) in a Marine application.. 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 thought about adding some sort of extra protection but never did. While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. 4. 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. . 29. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. 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. Holley Sniper O2 sensor replacement. I've dunked mine lots of times. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. 5. 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. If you let it cool down again, does it start up fine? I really dont want any issues on the whitewater lol Holley Sniper EFI Wideband Oxygen Sensor. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. Mine is right where Steamers is, and works well with my AFI TBI. 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.). Full time feedback from the sensor is what the computer uses to refine the fuel table. Wideband Oxygen Sensor Extension Cable. 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. Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. YES! Register now for free!) #3. EFI System Pro also has a good bit of tech info on their website. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. . Newer ECMs have all the options to configure these functions. But you still risk a little water running back at low Rs. A 90-degree V-6 has three shared crankpins set 120 degrees apart. 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. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. Even if you are the sort to sort of shrug off safety regulation, consider that if there is an accident that results in a loss and an investigation, failure to follow applicable USCG regulation could result in either financial or legal liability, not to mention the rejection of insurance claims. 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. Hello Chris,Ontario's boating season is about to launch for another year.Do you have any good news to add to your above article, any new marine friendly TBI products?In '08,I installed a Holley 21-700 TBI with the o2 mounted in the manifold to Holly specs. FWIW, I called Holley to confirm the part number and they say the Bosch part number if 17212 (also available on Amazon for $64.78). Staff Writer. JavaScript is disabled. A replacement clamp on would be an easy change out. Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. Waiting for spring to put back together. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. Holley EFI 554-155 Holley EFI Oxygen Sensor Part# 50-5009QFT. 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. I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. 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. 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. I know from some of the other posts, there have been WBO2 sensor issues. 100% identical. Introducing Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. 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. running holley sniper without o2 sensorplymouth township mi police scanner. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. This page was generated at 08:35 AM. Sniper EFI 4bbl Marine. No one cares about your buddies old antiquated garden hose technology. EFI EFI kit electronic fuel injection. Precisely Adam. Sniper EFI 2300 Marine. Get fast, Free Standard Shipping on orders over Summit Racing Equipment from $99 -- no shipping, handling, or rural fees! 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. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. Bolt-on carburetor style EFI for your classic car or truck. but I'm finding when running engines with holley sniper kits the the engines are very eratic ,the air fuel numbers are always changing drastically from one pull to . Douglas Cline. You must log in or register to reply here. I think installing a wide band O2 sensor in the manifold(s) is a great 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. non biased Shelby Cobra related site! Then turn the engine off and "lock in" the tune in a non-feedback loop mode, and quickly remove the headers and wash them off to prevent damage and then swap to the manifolds, but that would honestly be a huge PITA. WARNING: It is against the law to install this part on an Emissions Controlled Vehicle, By Corey A on June 4, 2021 | Verified Owner. I will get a new 02 sensor before I swap back to the orange box. 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. You can selectively provide your consent below to allow such third party embeds. Search for O2 Hotel Taipei Main Station discounts in Taipei City with KAYAK. He also explains how to properly install them. 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. Holley EFI has the solutions you need to get your project up and running better than ever! I installed a holley sniper kit. Other countries likely have simmilar approval processes for marine engines. I will keep the in-line pump for a spare. There can be leftover debris from manufacturing that have been washed down and are now clogging one. The spark must be manually tuned. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. In the case of the car, you can generally get out and walk (run?) He had one there that was run on a dyno then the fuel map was set and shipped back. This is the 02 sensor adapter I used. I have installed the Holley hp efi MPFI on my twin inboard mercruiser 350ci 270 hp. After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. Throttle body mounted ECU - no extra boxes to mount. 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. 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 either of these operating temperature ranges is exceeded, the sensor can no longer be . 92 YJ 4.0, AX-15 5spd, np231, dana 30 front, dana 35 rear. Shop Oxygen Sensors at Summit Racing. Specs. If you have long tube headers, mount the sensor approximately 6-10" after the collector. 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. Part # HM206. 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 would back-burner the ignition control questions until you get the fuel injection working. You should then have at least 18-24" of pipe after the sensor. #1. This requires a considerable additional investment but as long as you're doing things you're not going to do them half-way, right? Do you recommend in-tank or external fuel pump? If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. 3. Specs. 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. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Look at the bottom.. I just installed a Sniper on a 67 GTO and it was pretty straightforward, the end result was a much better starting/smother running car, than can adapt to elevation changes better, But we also installed the Holley Dual sync distributor for a complete system that adjusts timing as well. But MAP sensors are very easy to physically implement and are inexpensive. Part# 554-155. Any exhaust down at engine level or lower will definitely get at LEAST some steam. 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. the engine not running. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. I will be calling around to see if I can find someone to help that has experience. What exhausts are the best? So there is at least some probability of success. 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.
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