running holley sniper without o2 sensor

I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. You should then have at least 18-24" of pipe after the sensor. I am just now ready to do the tuning this weekend. After discussing it in this thread and talking with Holley's tech support, I decided . Part# 554-155. holley efi. Holley EFI Oxygen Sensor. This is the 02 sensor adapter I used. 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. excessively rich mixtures), Mechanical shock (e.g. This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. Next, the new unit was installed onto the manifold. O2 Sensor Mounting: The O2 needs to be mounted 6-8" after the merge in the header collector. Thanks for the compliment--we look forward to your feedback! 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. Not sure how well the sensor likes being that close to the port. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. Great Article. My hand is holding the connector to the sensor. I'm 3" down from the bottom of the flange to center of bung. Bosch 17025 Oxygen Sensor #1 Best Seller . "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. Is this a viable upgrade for my boat? And the relay and fuse were mounted along the firewall. Will I be able to run both systems off of one fuel pump? 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. I have not yet got it figured out. Well an update on the Sniper install. Pay close attention to the instructions on O2 sensor placement. test the sensor.. for a basic pass/fail of the sensor. One example of a direction could be an adjustable timed delay-on injector-power relay in the injector power feed wire, delaying 1-second after key-on or whatever is necessary to bypass the prime shot time, only. As I have since added above, the Sniper simply isn't going to be the system to use to tackle this problem. The Tech Tips and discussions are also great! p.s. *Possible delays due to Covid-19 click for more information. I have a boat with twin 3.7 Mercruisers. 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. Marine O2 Sensor Adapter Plate - Affordable Fuel Injection Then if you are do you just wire the o2 sensors in parallel or do these EFI kits have inputs for more than one sensor. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. This doesn't mean it can't be done. Phil said water would still get up over the snail and knock out the sensor. A third option would be to run your EFI system without an O2 sensor at all. Follow USCG rules about materials and fittings. This Video Shows Ideal O2 Sensor Placement! Holley recommends a 3/8" fuel supply line. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. Description. 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. We can hear the initial fuel spray into the body, but it appears that its not enough to start the engine while hot. Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. 29. Good luck to all. The O2 sensor burned out immediately. It will not fit on round or oval risers without a suitable flat area. I have also picked up another .5 gallons per hr to about 9.25 gph. He is a wizard, might be able to give you some pointers, will ask you what version of the software you are on, whether you're running the progressive adjustable linkage, etc. 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). No matter what I do, it will not start. I was thinking aluminum heads would run it up closer to 5,000 rpm. 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. The Sniper EFI throttle-body drops in place of your . 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. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. That is defacto step one in trouble shooting fuel injection systems. Still needs a EFI pump and return line. Search for O2 Hotel Taipei Main Station discounts in Taipei City with KAYAK. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. CTS (Coolant Temperature Sensor) - Reads engine temperature. The ones in the Bosch box come without warranty. suspect bad o2 sensor with Holley efi | Yellow Bullet Forums EFI System Pro had everything I needed for my EFI upgrade. The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. I will change and be using an in-tank pump when I install the new 120 gallon tank this winter. . I would back-burner the ignition control questions until you get the fuel injection working. The engine floods and it is embarrassing when leaving a lock. - Do you know of a Carburetor Builder who has addressed the Coast Guard certification issues with the Sniper EFI? Doesn't look like it will have an O2 sensor. 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. Emissions. Can anyone share their experiences with this type of setup? . I wouldn't say "never", but the last time I asked that specific question I was told it wasn't anywhere on the horizon. Some logs have water up to just short of the port. I have a 74 bronco, 302, mild cam. 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). Holley Sniper Marine EFI | Bloodydecks The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. Then dialed back the cranking fuel quite a bit and that seemed to help some, but still having ongoing issues. Bolt-on carburetor style EFI for your classic car or truck. 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. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. Comes VERY complete.throttle cable bracket, kickdown bracket, base plate studs & nuts, heat shrink type connectors, and pretty decent instructions as well. Part # HM206. Explained: Holley EFI Sensors and What They Do Wideband Oxygen Sensor Extension Cable. :-), I started using OMC and Volvo Penta pumps for my conversion. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. The fuel pump question is the tough one. We use cookies to enhance your experience while using our website. The throttle body has a built in fuel pressure regulator set at 58.5 psi. Just a rumor. It's fast, simple and absolutely free. 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. I've dunked mine lots of times. My bet based on longer pump run, to make pressure, you have a leaking injector. This was for MPFI. pull the sensor out of the exhaust. : For registered members this ad will NOT show. Late to the party but here's where mine are installed. I installed one also on mercruiser 260 hp. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. 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. Replacement Sniper and Terminator X O2 Sensor. You are using an out of date browser. Mine is right where Steamers is, and works well with my AFI TBI. This doesn't apply to race boats. So I bought the progressive linkage but you then have . Holley Sniper - Oxygen Sensor Location | IH8MUD Forum O2 Sensor in a boat exhaust | Performance Boats Forum But you have to get it tuned. To take advantage of all the site features, please take a moment to register. I installed the adapter and elbow so it's at an angle above the entry point. Put an end to cold start issues, hesitations, vapor . I tried holley tech support, no answer and put on hold for hours. 10 min read Video. It is possible for the ECU to have an internal failure that can kill O2 sensors. It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. Ran about 5 seconds and died. replaced my original terminator x sensor that was mounted in an exhaust that took on some water and killed the original sensor. Sniper EFI Releases new Stealth 4150 Models! Look at the bottom.. Incense-veiled temples with exquisite carvings and paintings dating back to dynastic times blend seamlessly in streets of the modern city. I think installing a wide band O2 sensor in the manifold(s) is a great idea. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. Register now for free!) What motor is this on? 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. Welcome to ClassicBroncos! Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. It does not look like anything particularly superior in concept. 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. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. I have searched thru the forum as much as I can, with not much luck. Holley Sniper Efi - Mean Chicken Jet Boat Forum Search for the cheapest hotel deal for O2 Hotel Taipei Main Station in Taipei City. 2023 Holley Performance Products, Inc. All Rights Reserved. They are about 4 inches long, in-line between the log and manifold. 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. With over the transoms you might get away with it if the water is introduced at the very very end, and the O2 is mounted right at the log. But MAP sensors are very easy to physically implement and are inexpensive. 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. A replacement clamp on would be an easy change out. Distributor and ignition box? Advertising . 74 FJ40 confined to the swamp. I have about 30 hrs on the unit and it just keeps getting smoother with every hr of run time. 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. JavaScript is disabled. Installed the sniper/MSD combo on my mildly built 460 KEM. (If I am incorrect I heartily invite your comment at the bottom of this article!) Then having an experienced tech from a local dyno speed shop ride in the boat as you run the power up and down, making notes. You really want a bigger engine. Holley Sniper O2 sensor replacement - Club Cobra I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. I recognize that it would be an absolutely tremendous investment, but based on the overwhelming response we get to this post I am pretty confident that the market is there. Super helpful and knowledgeable. Register now for free! Sniper EFI 2300 Marine. 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. Holley Sniper EFI Oxygen Sensors 554-155 Restore | Make | Philosophize | Eat | Drink | Be Happy | Let's Go Brandon! Q1. They are the only ones got me a holley usb to can cable fast. Purely coincidence about the '2300' number. In the case of the car, you can generally get out and walk (run?) Price Point: $$$. I had the pink ecu signal wire connected to a bullet connector on the passenger side . An update from Al:After installing them I used the auto tune program on the Holly HP V4 software and they are working great. Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. Converting Marine Engines to EFI | EFI Pro Hangout | General Studies The test run was great, they have never run so well even when they were new with carbs. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). Hooker BlackHeart Oxygen Sensor O2 Bung 2.25" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 2.5" Clamp-On Style, Hooker BlackHeart Oxygen Sensor O2 Bung 3.0" Clamp-On Style, Holley Oxygen Sensor O2 Bung Weld-In Style. . Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. I've installed several of these adaptive EFI's on cars with great success. I installed it without O2 sensor, adjust on the fly. There can be leftover debris from manufacturing that have been washed down and are now clogging one. Add to Cart . 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. Initially I was looking for the upgrade to a 4V holley 4175 carb, but this option has peaked my interest. I will get a new 02 sensor before I swap back to the orange box. I will be starting mine up this month, I hope it goes well, good luck to you. As far as packaging goes, one comes in a Bosch box, the other in a Holley package. If you have long tube headers, mount the sensor approximately 6-10" after the collector. Has anyone run an O2 sensor in an EFI on a marine engine? *Possible delays due to Covid-19 click for more information. 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. - The sales brochure refers to Integrated Ignition Timing Control and Coil Driver. Holley sniper issue on newly rebuilt motor, Holley Sniper with Duraspark and timing control. 5. you don't want to read that loss. Holley Sniper EFI Self-Tuning Kit - Black Ceramic Finish. Yellow Cold! 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. Has been since the 80's. Precisely Adam. This motor would probably turn the berk to 6 grand and blow it out from a stop.Motor dyno'd on a carb @389 hp @ 4700rpm and 497 tq @3500. I will keep the in-line pump for a spare. Be sure to disable autotune and remove the O2 sensor before it dies. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. We Test It: Holley's New Sniper EFI - MotorTrend Add to Cart . Good luck! While these base maps are generally quite good for cars they are going to be pretty far off in the case of marine applications. Initial Calibration in Basic Configuration. As always, your results may vary and batteries not included. 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. Bolt-on carburetor style EFI for your classic car or truck. Found out that it was due to rfi/emi. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Not always the case with a boat. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. Menu. Could show a lean condition when in fact it really isn't. It doesn't even mean that you can't do it. Other countries likely have simmilar approval processes for marine engines. The plan is to 'learn' a fuel\Timing curve with a closed loop. Any word on this? Boats don't cruise at 60mph up and down hills. Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. It's hallmark is its simplicity--but in this case it is also it's shortcoming. Supports up to 650hp with Four 100 Lb/Hr Injectors! I am considering the Daytona Sensors Ignition module. Note the temperature sensor mounted on the back of the driver side head in the above photo. a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: . Bolt-on carburetor style EFI for your classic car or truck. I didn't read all this, but yes, the EFI system can be run without a WBO2 sensor. 2. Are you running the entire system? Thanks guys. From there, our highly trained factory refurbish technicians flow the original fuel injectors. If you're thinking that you've read everything above and are ready to toss the carb on your marine engine then take this handy quiz to make sure! There are drawbacks to that (as your tuner can explain in more detail) but it is doable, provided the system is correctly tuned initially. Tips on how to measure the correct location and other considerations when welding in an O2 sensor bung. is donald smith still alive; julie grant court tv cheerleader I did--- Save your money and piece a fuel it together. While the Sniper has an absolutely outstanding internal ECU, the current model does not offer any laptop programmability. This is made by Innovate, the guy that runs the Holley EFI forum HIGHLY recomends AND uses them himself, I use them, my o2 on my wideband Innovate, kept going bad, a 4.2 Bosch o2, put this on both my Holley HP NTK sensor & the wide band, been 2 years now & lots of driving, all good, Heat-Sink Bung Extender (HBX-1) - P/N: 37290 The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. I just discovered that was the case with my Fitech. Part # 554-155. 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. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. - You are currently viewing the forums as a GUEST. 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. Capability Range: Advanced 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. 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? 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. When either of these operating temperature ranges is exceeded, the sensor can no longer be .
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