i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. 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? It's fast, simple and absolutely free. In a horizontal or if pointed upwards it can collect exhaust condensation liquids upon start up. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. I had a blue wire coming out of the firewall that met this need, but it was already hooked-up to the + side of the coil and the Duraspark box. Initial Calibration in Basic Configuration. 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. Sniper EFI 2300 Marine. Don't know about HP increase, with the QFT 750 it would turn a 212/4.0 combo to about 3950 to 4000, the Sniper turns it to 4000 to 4100. Note the temperature sensor mounted on the back of the driver side head in the above photo. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. Then if that doesn't work call the tech line they are great! The in tank pump is quieter, will normally run cooler and should last longer. But it is going to be a little tricky. : For registered members this ad will NOT show. When the Sniper EFI System received USCG approval at the end of 2018 this presented some hope for boat owners. Just a rumor. Is this a good upgrade? Replaced O2 sensor but continued to have AFR issues running too rich. All of the wiring begins at the throttle body and connects outward from there. The spark must be manually tuned. 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. Have engine apart and head checked and cleaned at machine shop. Wideband Oxygen Sensor Extension Cable. 10 min read Video. I will change and be using an in-tank pump when I install the new 120 gallon tank this winter. It does this every time..when you start a warmed up engine, its too rich and starts poorly without throttle. I am a competent mechanic and I have checked all the usual suspect items. Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? John 1:5, 1969 FJ40 2F with Holley Sniper EFI, Power Disk Brakes Front & Rear, Downey, Your post has peaked my curiosity. May God's grace bless you in the Lord Jesus Christ. Are you holding your RPMs back with the MSD for some reason? Q2. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. 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 first option is to just buy the injector body and the controller with the wiring harness and sensors. . Fuel economy went from 12.5 to 13.5 gph to 10 gph. My hand is holding the connector to the sensor. Can anyone share their experiences with this type of setup? Marc, you don't mention which system you installed but the Holley systems are fully configurable. 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. It doesn't even mean that you can't do it. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. I have tried several different settings to get it going, no luck. Full time feedback from the sensor is what the computer uses to refine the fuel table. You are using an out of date browser. As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . The engines are rated at 170 hp each. See Details. This really applies to any O2 sensor regardless of EFI system. I recently installed the sniper setup on my stock 71 duster 340 4 speed. 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. It does not work with the Sniper EFI oxygen sensor. Description. $132.95. I have searched thru the forum as much as I can, with not much luck. Yes, this is an old thread, but it's an old unit. Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. But for just over $10 and two simple configuration changes you can switch to a progressive linkage that opens only the two primary barrels at first and then brings in the secondary barrels at a later point. 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. Next, the new unit was installed onto the manifold. So please, If you have problems registering or can't log into your account, please. 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. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. The bottom line is that trying to run EFI on a marine engine is not something you can do as an afterthought. I know from some of the other posts, there have been WBO2 sensor issues. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. If you're not running one (or if you are and the water has killed it) then it is not surprising that you are running rich. 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. Sniper EFI 4500 Marine. Adam. Running? You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. For a better experience, please enable JavaScript in your browser before proceeding. It only runs rich on start up for a second due to the prime, after start it runs great. The World's largest The first thing to consider here (if you are in the USA) is US Coast Guard (USCG) Safety Approval. Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever! The throttle body has a built in fuel pressure regulator set at 58.5 psi. According to AEM Electronics, a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: Additionally, if an Sniper or Terminator X EFI System has repeated O2 sensor failures and none of the above-listed suggestions seem likely then contact Holley and arrange to have the unit tested. All times are GMT-6. Tech Resources. 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. My bet based on longer pump run, to make pressure, you have a leaking injector. It flows 850 cfm and can support up to 650 horsepower. All sensors are tested to ensure they accurately report critical engine data to the . Holley EFI Usb/Can Harness, Sniper Tbi. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas. I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. Phil is right. 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. PS, Once someone has a good 270/350 tune, everyone can use it. Oxygen Sensor, Replacement, Sniper EFI, Terminator X, 3-wire, Thread-in, Each See More Specifications | Check the Fit. Maybe this one has a shorter cable? Innovate Motorsports HBX-1 Bung Extender. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. 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. Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. Q1. I installed a holley sniper kit. 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. There is no problem getting this tuned and then running open loop. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. The spark must be manually tuned. No, use only one 02 sensor, mounted close to exhaust manifold, or high up on a Header collector, not into a single Header pipe that merely gets a exhaust pulsation. 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. I found this in the instruction manual for the older commander 950 system. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. Super helpful and knowledgeable. I was mocking it up at the time. Holley EFI has the solutions you need to get your project up and running better than ever! If you have a manual tranny starting off without squealing the tires can be tricky because all four barrels open up at the same time. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. Currently has 2 bbl carburetor and mechanical distributor, mechanical fuel pump for 165hp. (If I am incorrect I heartily invite your comment at the bottom of this article!) 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. AFR was 19 area. From time to time we receive phone calls from individuals who are interested in converting their carbureted boat motor to fuel injection. Mine is right where Steamers is, and works well with my AFI TBI. Those "flames" are still consuming O2 that would otherwise not be read by a sensor in the correct location. I was thinking aluminum heads would run it up closer to 5,000 rpm. (probably with the edelbrock marine 2506 intake). Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. 5. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. A replacement clamp on would be an easy change out. Sorry for the late reply. Some parts are not legal for use in California or other states with similar regulations. They are the only ones got me a holley usb to can cable fast. Followed all the instructions to the letter. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! When it did keep running, the headers all started to smoke. If this could be disabled it would be much better. For a better experience, please enable JavaScript in your browser before proceeding. Holley Sniper O2 sensor replacement. 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. Now the lower cost Holley Sniper advertised for March 31 2016. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. Sep 14, 2021. Installed a Lokar throttle linkage bracket custom made for the Sniper, removing the old one that had been on my Holley 750. Part# 534-199. Welcome to ClassicBroncos! Yes! HP comes from torque and rpm and rpm breaks things and increases wear. Holley recommends a 3/8" fuel supply line. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Please consult the Holley Sniper full manual and use this guide for supplemental clarification. Here is one on start up tuning. Got a picture? They have been working out well for a few years now. If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. Holley EFI Oxygen Sensor. WARNING: It is against the law to install this part on an Emissions Controlled Vehicle, By Corey A on June 4, 2021 | Verified Owner. The clamp-on that came with mine wasnt a good fit on my 2" pipe. Car runs perfect . non biased Shelby Cobra related site! As far as a sensor goes, absolutely nothing. The truck started fine after install, and ran down the road ok. Seems to have more low end tq and is much smoother power through out the rpm range. Find a lower price anywhere and we'll beat it by 5%! On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. There are five significant plug connections to make from the throttle body: Plug into the oxygen sensor. 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. p.s. Howell indicates that this adapter was designed for the Chevy type Mercruiser manifold but that it should work on any similar marine wet manifold. Followed all the instructions to the letter. Prime cannot be adjusted on this old unit. As far as warranty goes, Holley products are covered by a 90-day warranty against defect in material or workmanship. Thanks guys. MAP Sensors. 02 sensors are very heat sensitive, and can detect an exhaust pulsation in a single Header tube, that's why we always wanted to position the sensor into at least 2 opposite firing tubes we running Headers. Restore or update your Holley Sniper EFI System with this WBO2 Sensor 17025 Bosch 554-155 Holley. Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. I also capped off the regulated return line with a hose, clamps, and chamfering bit. 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. Add To Cart. I wanted to let you all know, I have modified a mercruiser Cool Fuel Gen 3 module(mounted on the engine) to provide fuel to a sniper. You are using an out of date browser. What is your fuel pressure at the carb during crank? We may earn a small commission from affiliate links and paid advertisements. 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. Are you running the latest software? 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. . Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. So there is at least some probability of success. #1. No prime, but a second later it's ready to crank 'normally'. Advertising . Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. And who can blame them? Is this a viable upgrade for my boat? Looking for some advice pertaining to Holley Sniper and Tire Size upgrades. And the relay and fuse were mounted along the firewall. Doesn't look like it will have an O2 sensor. Thanks for the heads up. EFI System Pro also has a good bit of tech info on their website. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. 2. Bolt-on carburetor style EFI for your classic car or truck. It may not display this or other websites correctly. Without Headers Steamers location (above) is perfect, up close to the engine where you . 29. That is defacto step one in trouble shooting fuel injection systems. Systems that were already designed for marine efi. 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 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. Finally, do you also recognize that the self-tuning feature of the Sniper EFI may not result in an acceptable configuration for your boat and, as such, may require you to seek professional tuning?

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