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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. I thought about adding some sort of extra protection but never did. Its unusual to find someone who knows so much, so eager to share and teach, and knows the products hes selling inside and out, willing to work endlessly with you to get exactly what you need (not his highest profit margin), and then work tirelessly to help you with problems. Part# 550-511. Taking a look at the holley manual I am thinking about drilling and tapping the front exhaust port on the log for the O2 sensor. Some parts are not legal for use in California or other states with similar regulations. Runs like a champ now. #1. The ones in the Bosch box come without warranty. test the sensor.. for a basic pass/fail of the sensor. I purchased the Holley HP MPFI system and went to the lake with it. YES! When it did keep running, the headers all started to smoke. I have not gone back in to try to fine tune them. THen you have to determine if you want 02 readings from one cylinder, or in the case you just mentioned mostly one cylinder, average of 4 cylinders on one bank or the other, or average of all 8 cylinders. What is your fuel pressure at the carb during crank? In Stock. The truck started fine after install, and ran down the road ok. Any exhaust down at engine level or lower will definitely get at LEAST some steam. Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. 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. There are five significant plug connections to make from the throttle body: Plug into the oxygen sensor. - Do you know of a Carburetor Builder who has addressed the Coast Guard certification issues with the Sniper EFI? My question is concerning what happens a year later, when I have a top-end swap . This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. I installed a holley sniper kit. For this you need a system that can be fully programmed to the extent of the Holley ECU's capability. My bet based on longer pump run, to make pressure, you have a leaking injector. Please consult the Holley Sniper full manual and use this guide for supplemental clarification. Advanced throttle body injection systems capable of transmission control and more. I installed a holley sniper kit. 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. 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. An O2 sensor is used when converting an engine to fuel injection and wanting to move from an "open loop" system to a "closed loop" system. Your talking flames at that point, and it will definitely have an effect on the reading. Fine tuned the timing to 12-15 degrees. It has about 18 hrs to date and is working great. 3. Part# 554-155. holley efi. We can hear the initial fuel spray into the body, but it appears that its not enough to start the engine while hot. Holley Sniper EFI Wideband Oxygen Sensor. Not sure how well the sensor likes being that close to the port. 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. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. One comes in the form of a Marine O2 Sensor Adapter from the folks at Howell EFI. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. Yes! Plug into the coolant temperature sensor. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. Holley EFI Oxygen Sensor. Maybe my manifolds leaked the inside between the snail and the log?? 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. *Possible delays due to Covid-19 click for more information. . Tech Resources. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. Boats don't cruise at 60mph up and down hills. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! The in tank pump is quieter, will normally run cooler and should last longer. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. 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. All of the wiring begins at the throttle body and connects outward from there. I think installing a wide band O2 sensor in the manifold(s) is a great idea. Thinking about this I think this will work very fine! 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. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. Most water jacketed header manufacturers (Lightning, CMI, etc) will install 02 bungs in their headers for extra money. I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. I had an injector fail after a month of running and called the tech line who helped me figure that out. What exhausts are the best? What Is Pinion Offset, And How Does That Affect You? We also use content and scripts from third parties that may use tracking technologies. EFI Systems based on Holley's world-class Dominator and HP ECU's. Introducing Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. you don't want to read that loss. In this case, the prime shot is good for cold, but too much for warm. I have searched thru the forum as much as I can, with not much luck. Holley recommends a 3/8" fuel supply line. Bolt-on carburetor style EFI for your classic car or truck. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. It may not display this or other websites correctly. Holley Sniper EFI Oxygen Sensors 554-155 The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. Add to Cart . That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Marc, you don't mention which system you installed but the Holley systems are fully configurable. I am a competent mechanic and I have checked all the usual suspect items. The very basic fuel and spark tables are the limiting aspect, Holley does offer advanced software for more precise tuning. Then dialed back the cranking fuel quite a bit and that seemed to help some, but still having ongoing issues. Staff Writer. For now I have a genuine bosch O2 and Standard Automotive TPS installed. 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. well I have installed the Sniper on my 460 KEM (Ford) marine motor. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. I am concerned about the O2 sensor consideration, but in the end isn't the carburetor situation open loop? Hopefully this one lasts longer than the original. You should then have at least 18-24" of pipe after the sensor. Add To Cart. The engine RPM when closed loop o2 will begin. Do you recommend in-tank or external fuel pump? In order for it to work as designed the O2 sensor has to be installed in a dry exhaust system and needs to be placed 1-10in from the collector in the headers. 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. But this also makes me wonder what you did for the O2 sensor. 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. And the relay and fuse were mounted along the firewall. From there, our highly trained factory refurbish technicians flow the original fuel injectors. On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Stay up to date with the latest releases, events, promotions and more. For a better experience, please enable JavaScript in your browser before proceeding. 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. Oxygen Sensor, Replacement, Sniper EFI, Terminator X, 3-wire, Thread-in, Each See More Specifications | Check the Fit. The Sniper EFI master kit contains the most complete EFI fuel system on the market. Will I be able to control my ignition timing with the Sniper? 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. Great Article. I really dont want any issues on the whitewater lol I don't have enough experience with marine applications to know exactly what it will take to solve this. While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. Fortunately, it turns out there are some options. It should be pretty straight forward what each of these values do. Late to the party but here's where mine are installed. Master ASE tech since 91. Did you use the Holley fuel pump and have you had any issues with it? Sniper EFI Releases new Stealth 4150 Models! I'm having new headers with an O2 sensor bung installed in my car ('79 Vette) soon, to prepare for a Holley Sniper EFI TBI install this winter. Sniper EFI Releases new Stealth 4150 Models! Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? I also capped off the regulated return line with a hose, clamps, and chamfering bit. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. Advertising . What motor is this on? We use cookies to enhance your experience while using our website. 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. Just a rumor. But you've found the right one for your Holley Sniper EFI System OR your Terminator X EFI System. 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. If you let it cool down again, does it start up fine? Free ground shipping regardless of order size! I've been building a TBI system from GM parts to use on a 1987 Wellcraft with the Mercruiser 4 cylinder engine. The O2 sensor burned out immediately. Welcome to ClassicBroncos! Since the Sniper install, I encountered my second O2 sensor failure so I thought I would try the "Innovate Bung Extender" recommended by a few folks here. I installed a Holley sniper system on my car and I've been fighting it for 2 weeks now. I will keep the replacements as spares. 2 Reviews. 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. 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. Thanks for the compliment--we look forward to your feedback! 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. . One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . Wherever you go, the cultural kaleidoscope of Taipei showcases exhilarating diversity. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. 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. Oxygen sensor: It's perfectly OK to share narrow band oxygen sensors with the stock ECU. Tips on how to measure the correct location and other considerations when welding in an O2 sensor bung. 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. I installed the adapter and elbow so it's at an angle above the entry point. In Stock. Stay up to date with the latest releases, events, promotions and more. Jun 7, 2021. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. I want to register an account for free right now! So I bought the progressive linkage but you then have . As far as packaging goes, one comes in a Bosch box, the other in a Holley package. 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. You'll also notice that the firing order is 1-6-5-4-3-2. Seems to LEARN much faster than the Fitech did. George Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Yellow Cold! Purely coincidence about the '2300' number. Doesn't look like it will have an O2 sensor. #1. Maybe going all the way to the front is the way to go? This was for MPFI. I didn't read all this, but yes, the EFI system can be run without a WBO2 sensor. ), 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. Holley sent him a new one for free. I received my replacement TPS and O2 sensor. If you have long tube headers, mount the sensor approximately 6-10" after the collector. Waiting for spring to put back together. There can be leftover debris from manufacturing that have been washed down and are now clogging one. $119.95. 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. Everything about the fuel prime shot can be adjusted. Without Headers Steamers location (above) is perfect, up close to the engine where you . Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. Only show this user. -- I particularly like the Daytona Sensors Approach to the Ignition Curve.- Are you pursuing Coast Guard Certification for the Sniper_EFi? A forum community dedicated to performance boat owners and enthusiasts. John 1:5, 1969 FJ40 2F with Holley Sniper EFI, Power Disk Brakes Front & Rear, Downey, Your post has peaked my curiosity. Incense-veiled temples with exquisite carvings and paintings dating back to dynastic times blend seamlessly in streets of the modern city. 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. Innovate Motorsports HBX-1 Bung Extender. You will need an O2 sensor to measure fuel needs, but it could be tuned manually like in the old days. The Sniper EFI throttle-body drops in place of your . I'm 3" down from the bottom of the flange to center of bung. 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 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. Your BluePrint Engine will be equipped with a Holley model 550-510, or 550-511 (identical except for finish color) on 4150 flanged intake manifolds. QFI-500 Oxygen Sensor. 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. EFI EFI kit electronic fuel injection. Only a few hours on the motor but so far so good. 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 Installation Guide. Add to Cart . It works fine. Im almost at your exact same setup on a Redline 460/Berkeley pump but waiting to pull the trigger on the Sniper until I can pinpoint exactly where I can install the o2 sensor without the wet exhaust damaging it. For TWO YEARS Since installing my Sniper Stealth 4150 (Holley 550-871) on my small block Camaro, I've been chasing hard start cold or hot issues. $108.95. Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Thanks for the heads up. JavaScript is disabled. But you still risk a little water running back at low Rs. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . I've dunked mine lots of times. 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. - You are currently viewing the forums as a GUEST. So there is at least some probability of success. Categories. You will still get some water on the engine side of the snails, mainly at low Rs. Replacement Sniper and Terminator X O2 Sensor, This part is legal for sale or use on Racing Use Only Vehicles. I hope that the next F/2F header is more O2 sensor friendly. If the indicator reads "LOW Err" double check the connection to the CTS. 29. In order to do this, it heavily relies on proper O2 sensor placement. 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. It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. (If I am incorrect I heartily invite your comment at the bottom of this article!) Sensors that are installed in an exhaust must be connected to a properly functioning controller during engine operation 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. Capability Range: Advanced If this could be disabled it would be much better. Thanks for that, Danny. You really want a bigger engine. 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. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. EFI EFI kit electronic fuel injection. However, there's a good chance you will want to add a wideband O2 sensor at some point, in order to give the MegaSquirt more tuning information. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. This is the 02 sensor adapter I used. dropping a sensor on the ground), Extreme exhaust temperatures (Greater than 930 degC/1700 degF), Unheated sensor in exhaust stream. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Capability Range: Moderate Welcome to Club Cobra! Holley EFI Oxygen Sensor. 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. Idle and off-idle performance (particularly as the engine goes into gear.) Followed all the instructions to the letter. I am happy with Holleys no hassle replacement of the parts. The engine floods and it is embarrassing when leaving a lock. YES! About your only location is in that short area from the log to the port face. Is Holley working on a complete marine package or planning to in the future? Find a lower price anywhere and we'll beat it by 5%! 534-199. And it is timing that is equally critical to best performance and fuel economy. It's a compact HP pump and cooler assembly. 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. When the Sniper EFI System received USCG approval at the end of 2018 this presented some hope for boat owners. I will let you know what happens. Q1. Those "flames" are still consuming O2 that would otherwise not be read by a sensor in the correct location. Much of the system is encased right inside the throttle bodyand that includes the ECU. JavaScript is disabled. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. See Details. Part# 554-155. Anti-Seize pre-applied to sensor threads. 4. Not always the case with a boat. 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. Other? Put an end to cold start issues, hesitations, vapor . As always, your results may vary and batteries not included. Can more detail be provided? Anybody got a good 270hp 350 tune yet?I installed sniper efi on my boat runs good but feel like the wot should be better need to get the sniper controlling spark is my thoughts the old thunderbolt is either not great or timing wasn't right when I bought the boat but she runs great I just think this engine has more in it then I'm getting out of it at this time any tuning and timing advice would be great considering I'm awesome with carb n hei diet but new to efi and boat timing curve but not an idiot so I say. 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. Use a return fuel line. There was a 1.5 point difference in afr between banks. Replaced O2 sensor but continued to have AFR issues running too rich. They are the only ones got me a holley usb to can cable fast. 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. $102.95. Jan 20, 2019. 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. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. I will change and be using an in-tank pump when I install the new 120 gallon tank this winter. Free ground shipping regardless of order size! He had one there that was run on a dyno then the fuel map was set and shipped back. It flows 850 cfm and can support up to 650 horsepower. No prime, but a second later it's ready to crank 'normally'. . Also the progressive link. Increasing efficiency is always a good idea. check out the. Capability Range: Advanced It's fast, simple and absolutely free. non biased Shelby Cobra related site! 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: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. blue doberman puppies. The truck started fine after install, and ran down the road ok. I will get a new 02 sensor before I swap back to the orange box. 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.