One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . This really applies to any O2 sensor regardless of EFI system. Everything about the fuel prime shot can be adjusted. "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. Given the traditionally poor fuel economy of carbureted marine engines, we feel your pain. I installed a holley sniper kit. 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. 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. 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. A 90-degree V-6 has three shared crankpins set 120 degrees apart. 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. Comes VERY complete.throttle cable bracket, kickdown bracket, base plate studs & nuts, heat shrink type connectors, and pretty decent instructions as well. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. 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. Capability Range: Professional Then dialed back the cranking fuel quite a bit and that seemed to help some, but still having ongoing issues. While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. I mounted it here attempting to protect it from the deep water I play in and from lots of branches I encounter. He also explains how to properly install them. That sounds like one solution. Sniper EFI 4bbl Marine. 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. Was in marine engineering for years. 100% identical. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Wideband Oxygen Sensor Extension Cable. The wiring was a bit of a mess. 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. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Replaced and gapped to .45 all spark plugs. Those "flames" are still consuming O2 that would otherwise not be read by a sensor in the correct location. You will still get some water on the engine side of the snails, mainly at low Rs. Innovate Motorsports HBX-1 Bung Extender. The Sniper EFI throttle-body drops in place of your . looking at doing the same. I've installed several of these adaptive EFI's on cars with great success. 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? I'm about to embark on the same type of project. While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. 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. After discussing it in this thread and talking with Holley's tech support, I decided . CUSTOM ART FOR CUSTOM NEEDS. Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. Holley EFI Oxygen Sensor. $119.95. There can be leftover debris from manufacturing that have been washed down and are now clogging one. Late to the party but here's where mine are installed. I wouldn't say "never", but the last time I asked that specific question I was told it wasn't anywhere on the horizon. My hand is holding the connector to the sensor. That's great--we look forward to your results! well I have installed the Sniper on my 460 KEM (Ford) marine motor. i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. It's hallmark is its simplicity--but in this case it is also it's shortcoming. holley efi. Aftermarket headers are pretty much the only safe way to run an O2 sensor. I have also picked up another .5 gallons per hr to about 9.25 gph. What I think a lot of folks are missing is correct tuning of their carburetor engines Most inboard systems I worked on were intentionally set up to run rich with minimal timing (mostly to get through the warranty period). For the most part, the small harness is plug-and-play. Mine is right where Steamers is, and works well with my AFI TBI. I am happy with Holleys no hassle replacement of the parts. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. There are drawbacks to that (as your tuner can explain in more detail) but it is doable, provided the system is correctly tuned initially. Emissions. Add to Cart . Capability Range: Moderate When it did keep running, the headers all started to smoke. May 1, 2018 They want you to angle it to keep it from fouling. 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. 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). Idle and off-idle performance (particularly as the engine goes into gear.) Sniper EFI Releases new Stealth 4150 Models! PS, Once someone has a good 270/350 tune, everyone can use it. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? dropping a sensor on the ground), Extreme exhaust temperatures (Greater than 930 degC/1700 degF), Unheated sensor in exhaust stream. I want to register an account for free right now! Boats don't cruise at 60mph up and down hills. On a side note: Im getting 4200 rpms at 5000 elevation with stock heads. It flows 850 cfm and can support up to 650 horsepower. We can hear the initial fuel spray into the body, but it appears that its not enough to start the engine while hot. An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Jan 20, 2019. This was for MPFI. Essentially, when I push the clutch in and ease on the brakes to coast up to a stop light, the AFR goes lean (18:1 or so) and the engine stalls. Homemade body parts replace the originals as they rot away but it's a 40 on the inside. In a horizontal or if pointed upwards it can collect exhaust condensation liquids upon start up. The light shines in the darkness, and the darkness has not overcome it. I installed the adapter and elbow so it's at an angle above the entry point. I'm guessing by snail, that's another name for the riser? *Possible delays due to Covid-19 click for more information. Doesn't look like it will have an O2 sensor. You must log in or register to reply here. Installed a Lokar throttle linkage bracket custom made for the Sniper, removing the old one that had been on my Holley 750. There was a 1.5 point difference in afr between banks. Thanks for the compliment--we look forward to your feedback! Do you offer a USCG fuel pump kit? 3. Specs. Purely coincidence about the '2300' number. Please consult the Holley Sniper full manual and use this guide for supplemental clarification. It may not display this or other websites correctly. (probably with the edelbrock marine 2506 intake). A replacement clamp on would be an easy change out. I hope that the next F/2F header is more O2 sensor friendly. Even though you now have the USCG-approved Sniper EFI System as an option for your new EFI System you're not quite out of the woods yet. From there, our highly trained factory refurbish technicians flow the original fuel injectors. Without the engine running, AFR will read 35.6 The fuel pump will run off a relay in the sniper harness (blue wire) pink wire gets switch/run power to the relay. Greatest struggle is the shift interrupt. 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. What Is Pinion Offset, And How Does That Affect You? Yes, this is going to be an added expense, however, it will help guarantee your success. The new Exhaust manifolds will have wideband O2 bungs for tuning. I know from some of the other posts, there have been WBO2 sensor issues. 2023 Holley Performance Products, Inc. All Rights Reserved. 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. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. Car runs perfect . Once the tune is complete, the O2 sensor can be defeated or . 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.) Add to Cart . Bolt on 4150 Flange Carburetor Replacement. The first option is to just buy the injector body and the controller with the wiring harness and sensors. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. I am considering the Daytona Sensors Ignition module. Just a rumor. Vega$69. 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. Capability Range: Advanced I am in the middle of a repower of twin BBC 481, mild cam which will need to be recarbureted. Part # HM206. ), https://www.ebay.com/sch/i.html?_froensor&_sacat=0, https://www.amazon.com/Bosch-Automot1296929&sr=8-3, https://www.efisystempro.com/wbo2-seer-tbi-554-155, https://forums.holley.com/showthread2927#post82927. I have a 74 bronco, 302, mild cam. - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. Next, the new unit was installed onto the manifold. I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. I want to register an account for free right now! To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? While the Sniper has an absolutely outstanding internal ECU, the current model does not offer any laptop programmability. You must log in or register to reply here. Do you also recognize that the O2 sensor that is required for closed-loop operation will not survive in the "wet" manifold used by most marine engines, and that to install a device to protect the O2 sensor from this moisture may require the removal, machining, and replacement of the exhaust manifold? It doesn't even mean that you can't do it. I recommend popping for the Master . You are using an out of date browser. 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. JavaScript is disabled. But this also makes me wonder what you did for the O2 sensor. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! $5 Off Your $100 Mobile App Purchase . They have been working out well for a few years now. 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. Any word on this? Pay close attention to the instructions on O2 sensor placement. So far so good. Have you visually verified that all your injectors are spraying? 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. If you let it cool down again, does it start up fine? Fine tuned the timing to 12-15 degrees. 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. Will I be able to run both systems off of one fuel pump? Then they had it repaired and back to me in 5 business days. 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. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. . When either of these operating temperature ranges is exceeded, the sensor can no longer be . Why? About your only location is in that short area from the log to the port face. Add To Cart. is donald smith still alive; julie grant court tv cheerleader Capability Range: Advanced 74 FJ40 confined to the swamp. 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. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. 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. As far as spark control, the Sniper will let you tune those 4 points, nothing else will. 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. It does not work with the Sniper EFI oxygen sensor. These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. But you still risk a little water running back at low Rs. 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. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. Holley EFI. the motor has the following mods, Aluminum heads, Performer intake, Sniper and MSD ignition module. Capability Range: Professional Pink switched power wire, this needs to be connected to a point that is 12V in run and while cranking. Holley Sniper EFI Wideband Oxygen Sensor. Good luck to all. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. I am a competent mechanic and I have checked all the usual suspect items. 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. This doesn't mean it can't be done. And who can blame them? The opposing pistons share a crankpin the way they do in a V-8, but the fact that there are only three cylinders on each bank means that the plugs fire at 90-150-90-150-90-150 intervals. 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. Visit their website for more details. 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 . Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. watch the values in the software for the o2.. once is is done "Heating" and starts to show AFR, wrap the rag round it. Introducing Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. the engine not running. Sensors that are installed in an exhaust must be connected to a properly #1. EFI is the wave of the future. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. What is your fuel pressure at the carb during crank? Who knows. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. The bottom line is that trying to run EFI on a marine engine is not something you can do as an afterthought. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. Not always the case with a boat. Sniper EFI 4bbl Marine. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. It's fast, simple and absolutely free. You are using an out of date browser. Stay up to date with the latest releases, events, promotions and more. Thanks. 92 YJ 4.0, AX-15 5spd, np231, dana 30 front, dana 35 rear. 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. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . I was thinking aluminum heads would run it up closer to 5,000 rpm. I had an injector fail after a month of running and called the tech line who helped me figure that out. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! Much of the system is encased right inside the throttle bodyand that includes the ECU. Phil said water would still get up over the snail and knock out the sensor. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Marc, you don't mention which system you installed but the Holley systems are fully configurable. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. Is this a viable upgrade for my boat? $132.95. The ones in the Bosch box come without warranty.
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