non biased Shelby Cobra related site! In the case of the car, you can generally get out and walk (run?) While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. In Stock. O2 sensor failure on a Holley Sniper EFI - YouTube While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. I mounted it here attempting to protect it from the deep water I play in and from lots of branches I encounter. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. Holley EFI 554-155 Holley EFI Oxygen Sensor One comes in the form of a Marine O2 Sensor Adapter from the folks at Howell EFI. RPM going up and down , miss firing and backfiring. Otherwise I have to check for a place in my gasoline tank to put the lines in. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. I would prefer to run this brand new Holley EFI system in a closed loop, not set the fuel map, and use the O2 sensor as only a sensor. You should then have at least 18-24" of pipe after the sensor. You need to intimately know the system you are using, its capabilities and limitations, install it correctly and have it tuned with someone with experience specific to marine applications. 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. Joe, where did you end up installing the o2 sensor on your setup? This really applies to any O2 sensor regardless of EFI system. -- I particularly like the Daytona Sensors Approach to the Ignition Curve.- Are you pursuing Coast Guard Certification for the Sniper_EFi? Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. Holley Sniper O2 sensor replacement. The adapter plate installs in between the exhaust manifold and the riser/elbow allowing for the water jackets to still be in place and an o2 sensor to be installed in the still dry exhaust gasses. Everyone else was backordered several months. Sort. Visit their website for more details. If you are not running the latest software stop guessing and go download it. Go to the web site and it will explain the installation it is very simple and works well.As for the rpm you are comparing to completely different animals (pumps). I want to register an account for free right now! But this also makes me wonder what you did for the O2 sensor. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. 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. Holley Sniper O2 sensor replacement - Club Cobra Holley sent him a new one for free. You can selectively provide your consent below to allow such third party embeds. *Possible delays due to Covid-19 click for more information. If the indicator reads "LOW Err" double check the connection to the CTS. It may not display this or other websites correctly. I found this in the instruction manual for the older commander 950 system. Add To Cart. Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. 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. Part # HM206. One of the benefits of using any Holley EFI system is that it self learns and tunes on its own. It only runs rich on start up for a second due to the prime, after start it runs great. away. I've seen O2 sensors in water jacketed headers that have worked fine for years. The Tech Tips and discussions are also great! 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. You really want a bigger engine. $132.95. 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. Other countries likely have simmilar approval processes for marine engines. #1. Attempted to make a parts run in my 1990 Third gen Chevy Camaro with a small block chevy 350 with flowmaster mufflers.I believed the issue in this video to b. Use a return fuel line. Since your existing low-pressure fuel system is not going to work with the Sniper EFI System this puts you in the unenviable position of choosing between USCG compliance or EFI. I have also picked up another .5 gallons per hr to about 9.25 gph. Part# 534-199. 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. 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 hos. 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? A forum community dedicated to performance boat owners and enthusiasts. 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). MAP Sensors. ), 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 not yet got it figured out. 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. Great Article. Similarly, no multi-point fuel injection (MPFI) systems existed that were USCG approved. Good luck! May 19, 2021. Capability Range: Advanced Holley EFI Oxygen Sensor. I will keep the in-line pump for a spare. #HM206 - ADAPTOR, O2 SENSOR for Marine use - Howell EFI Conversion The wiring was a bit of a mess. 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. I think installing a wide band O2 sensor in the manifold(s) is a great idea. I had an injector fail after a month of running and called the tech line who helped me figure that out. The O2 sensor burned out immediately. And the relay and fuse were mounted along the firewall. I do believe that the Holley EFI ECU's have the capability to be programmed to work in this application, but have not yet found anyone who has tackled this task and been fully successful.If you (or anyone else) does make some progress on this, please reply here and let us know what works. 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. Price Point: $$$. Oxygen Sensor, Replacement, Sniper EFI, Terminator X, 3-wire, Thread-in, Each See More Specifications | Check the Fit. Restore | Make | Philosophize | Eat | Drink | Be Happy | Let's Go Brandon! watch the values in the software for the o2.. once is is done "Heating" and starts to show AFR, wrap the rag round it. http://forums.holley.com/showthread.ension-Harness, http://forums.holley.com/showthread.4388#post54388, If this is your first visit, be sure to This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. Sniper EFI Quadrajet Marine. They are about 4 inches long, in-line between the log and manifold. Holley's self learning system is a blessing and a curse. Other? CUSTOM ART FOR CUSTOM NEEDS. 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. What is your fuel pressure at the carb during crank? A replacement clamp on would be an easy change out. Stock manifolds? Everyone raving about customer service is telling the truth! I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. 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 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. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. 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. Affiliate. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. What I installed on the motors was the Holley HP 19lb Holley Injectors the Holley 522-198 duel sync distributors with the MSD Digital 6A and the MSD Blaster 2 coils. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. That's great--we look forward to your results! The truck started fine after install, and ran down the road ok. After some time, the truck will not start after it comes to operating temperature. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. Can anyone share their experiences with this type of setup? I am concerned about the O2 sensor consideration, but in the end isn't the carburetor situation open loop? They are the only ones got me a holley usb to can cable fast. Installing Holley Sniper EFI on a daunting, odd-fire V-6: Part 1 If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. Explained: Holley EFI Sensors and What They Do Running? You'll also notice that the firing order is 1-6-5-4-3-2. It's a compact HP pump and cooler assembly. Free ground shipping regardless of order size! Items 1 - 21 of 21 Items. Waiting for spring to put back together. 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. Apr 13, 2017. with the extension. Thanks for the feedback on this adapter, Donald. Part# 554-155. holley efi. CTS (Coolant Temperature Sensor) - Reads engine temperature. Product Q&A . On my system, I machined in the O2 sensor right between the snail and the manifold of a . 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. Shop Oxygen Sensors at Summit Racing. It will flood itself out and won't start back, just crank and crank. I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. PDF Holley Sniper Installation Supplement 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. Bolt-on carburetor style EFI for your classic car or truck. 4. O2 Hotel Taipei Main Station - KAYAK Part # 554-155. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Just a rumor. It turns out that the loading generated a propeller in the water is significantly different than wheels on pavement, so much so that the map has to be tuned differently. 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. The first option is to just buy the injector body and the controller with the wiring harness and sensors. I know from some of the other posts, there have been WBO2 sensor issues. Sorry for the late reply, Douglas. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. 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. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . To take advantage of all the site features, please take a moment to register. Q2. Stay up to date with the latest releases, events, promotions and more. Are you holding your RPMs back with the MSD for some reason? Sensors that are installed in an exhaust must be connected to a properly You have to angle it to help the throttle cable get around the booster. 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. It may not be enough to cause problems with the way the engine runs aor even make into the cylinders, but it is enough of a mist to take out a O2 sensor. B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. As far as packaging goes, one comes in a Bosch box, the other in a Holley package. 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. Jan 20, 2019. I installed a holley sniper kit. 02/25/2020. Without Headers Steamers location (above) is perfect, up close to the engine where you have not lost much heat. Installing MegaSquirt in Parallel With the Stock ECU Look at the bottom.. I received my replacement TPS and O2 sensor. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). Thanks for the compliment--we look forward to your feedback! This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. This was for MPFI. The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. Seems to LEARN much faster than the Fitech did. This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. Who knows. I am a competent mechanic and I have checked all the usual suspect items. The following vehicles are considered Racing Use Only Vehicles: Holley is the new standard in EFI! The truck started fine after install, and ran down the road ok. This requires a considerable additional investment but as long as you're doing things you're not going to do them half-way, right? running holley sniper without o2 sensor - dowdcreative.com EFI System Pro also has a good bit of tech info on their website. 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. O2 Sensor Mounting: The O2 needs to be mounted 6-8" after the merge in the header collector. #3. For the most part, the small harness is plug-and-play. For this you need a system that can be fully programmed to the extent of the Holley ECU's capability. so far so good love the smooth power and easy starts. Staff Writer. Converting Marine Engines to EFI | EFI Pro Hangout | General Studies As far as warranty goes, Holley products are covered by a 90-day warranty against defect in material or workmanship. 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. excessively rich mixtures), Mechanical shock (e.g. Holley 2300 is their nomenclature for a 2-bbl generic fitment carburetor. This Video Shows Ideal O2 Sensor Placement! you don't want to read that loss. I am in the middle of a repower of twin BBC 481, mild cam which will need to be recarbureted. 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. I have a 74 bronco, 302, mild cam. 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! I tried holley tech support, no answer and put on hold for hours. Has anyone run an O2 sensor in an EFI on a marine engine? Holley 554-100 NTK Wideband Oxygen Sensor. temporarily running without WBO2 sensor? - Holley Could show a lean condition when in fact it really isn't. And who can blame them? Car runs perfect . This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Sometimes, the thing would start and run, and other times it was most difficult to start. Add to Cart . Please consult the Holley Sniper full manual and use this guide for supplemental clarification. Install the throttle linkage to the Sniper EFI throttle body. Precisely Adam. If it's working to prolong the life of the sensor in the AEM Wideband kit then there is no reason to believe it wouldn't work with any other sensor. When problem-solving this type of issue, consider when and how you could use a work-around. As a follow up, I ended up using an eBay type anti fouler elbow for the O2 sensor to try and get it out of the water in the manifolds. Wideband Realities: The Truth About Oxygen Sensors - EngineLabs Thanks for the heads up. Initially I was looking for the upgrade to a 4V holley 4175 carb, but this option has peaked my interest. . That sounds like one solution. Oxygen sensor: It's perfectly OK to share narrow band oxygen sensors with the stock ECU. 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. Was told by holley tech support to make adjustments to the fuel prime percent and multiplier settings, played with those with no major improvement. I thought about adding some sort of extra protection but never did. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! I upgraded from terminator x Maxx to dominator.. bought a 2nd o2 sensor kit with Bosch sensor and used an off the shelf Bosch I had been using with terminator. I purchased the Holley HP MPFI system and went to the lake with it. Marine O2 Sensor Adapter Plate - Affordable Fuel Injection To those who have installed the Sniper EFI units, please post up some photos of where you tapped the exhaust line to install the Oxygen Sensor's weld bung. Wiring the Holley Sniper EFI system is equally easy. When the Sniper EFI System received USCG approval at the end of 2018 this presented some hope for boat owners. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! Will I be able to control my ignition timing with the Sniper? Got a picture? Maybe going all the way to the front is the way to go? Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. I will be calling around to see if I can find someone to help that has experience. AFR was 19 area. I think I could run more boost but it's a real hand full right now. 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. Menu. Capability Range: Moderate Advertising . 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. Systems that were already designed for marine efi. It should be pretty straight forward what each of these values do. Plug into the coolant temperature sensor. - Do you know of a Carburetor Builder who has addressed the Coast Guard certification issues with the Sniper EFI? quick fuel. Anyone have a good place to find a genuine Bosch O2 replacement sensor without paying $110? 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. The World's largest Idle and off-idle performance (particularly as the engine goes into gear.) It is possible for the ECU to have an internal failure that can kill O2 sensors. Staff Writer. I have a 74 bronco, 302, mild cam. Price Point: $$$. I've installed several of these adaptive EFI's on cars with great success. Holley Sniper - Oxygen Sensor Location Thread starter GA Architect; . 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. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. Make sure to put anti seize on the threads. Depending on how fast you want one, there are plenty out there: The Cross ref numbers on the Holley forums and the Net is a Bosch 17025. So I bought the progressive linkage but you then have . Thanks again for writing! Anyone ever converted a 1987 3.7L 4cyl Mercruiser engine to EFI. . Sniper EFI Installation Guide. Holley Sniper EFI - Page 3 - Offshoreonly.com Douglas Cline. Holley Sniper - Oxygen Sensor Location | IH8MUD Forum Much of the system is encased right inside the throttle bodyand that includes the ECU. EFI Systems based on Holley's world-class Dominator and HP ECU's. One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . YES! Holley Oxygen Sensor O2 Bung Weld-In Style; Larger Image. The engine floods and it is embarrassing when leaving a lock. I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. Howell indicates that this adapter was designed for the Chevy type Mercruiser manifold but that it should work on any similar marine wet manifold. 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. As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. From there, the idea is that it will self-tune to the requirements of the engine. As always, your results may vary and batteries not included. The Sniper EFI master kit contains the most complete EFI fuel system on the market. What you are able to accomplish with a Sniper is done exclusively through the setup wizard application on the 3.5-inch handheld.The Temrinator is designed to be set up with it's own setup wizard on the same 3.5-inch handheld display--but since it has a stand-alone ECU, it can also be fully programmed via the Holley laptop software. 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.