running holley sniper without o2 sensor

The problem occurs when an excessive amount of oxygen makes its way from the intake port directly into the exhaust at idle and low engine speeds because of overlap. I hope that the next F/2F header is more O2 sensor friendly. I want to register an account for free right now! And the relay and fuse were mounted along the firewall. That sounds like one solution. Has anyone run an O2 sensor in an EFI on a marine engine? Get fast, Free Standard Shipping on orders over Summit Racing Equipment from $99 -- no shipping, handling, or rural fees! I have twin 502 factory fuel injected Mercs and want to go to adaptive EFI. Price Point: $$$. The new Exhaust manifolds will have wideband O2 bungs for tuning. The boat underway acts very much like a water brake dyno I strongly believe that a well broken in engine in good condition can stand a much more critical tune w/o issues and deliver almost the same fuel economy as the proposed EFI conversion. It's hallmark is its simplicity--but in this case it is also it's shortcoming. 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. For complete information about the cookies we use, data we collect and how we process them, please check our, actual instructions in flowcharting are represented in, Why Is Dave Blankenship Not On Oak Island Season 8, rhode island groundwater classification map. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Runs like a champ now. For now I have a genuine bosch O2 and Standard Automotive TPS installed. Or maybe I could just use a piece of spare/junk exhaust tubing, and bolt it to the manifolds and add a weldless O2 bung to it. Newer ECMs have all the options to configure these functions. 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? pull the sensor out of the exhaust. Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. Note that this is a different sensor than Holley uses for their Dominator/HP/Terminator/Avenger series. The plan is to 'learn' a fuel\Timing curve with a closed loop. But it is going to be a little tricky. If you find that please let us know. The World's largest Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. Holley EFI Oxygen Sensor. RPM going up and down , miss firing and backfiring. Categories. Holley part number 554-155. well I have installed the Sniper on my 460 KEM (Ford) marine motor. 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. I know from some of the other posts, there have been WBO2 sensor issues. 74 FJ40 confined to the swamp. (If I am incorrect I heartily invite your comment at the bottom of this article!) The throttle body has a built in fuel pressure regulator set at 58.5 psi. http://s621.photobucket.com/albums/tt291/Mark11530/?action=view¤t=MAH05771.mp4, http://www.holley.com/data/Products/Technical/199R10226.pdf. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. Look at the bottom.. 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. Currently has 2 bbl carburetor and mechanical distributor, mechanical fuel pump for 165hp. 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. 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. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Only a few hours on the motor but so far so good. I am a competent mechanic and I have checked all the usual suspect items. Yellow Init In First shown for an instant when the system is powered on. Specs. Sort. Fortunately, it turns out there are some options. The in tank pump is quieter, will normally run cooler and should last longer. 5. Holley EFI has the solutions you need to get your project up and running better than ever! 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. No prime, but a second later it's ready to crank 'normally'. Specs. Other countries likely have simmilar approval processes for marine engines. Add To Cart. The wiring was a bit of a mess. If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. 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. You'll also notice that the firing order is 1-6-5-4-3-2. I just discovered that was the case with my Fitech. One comes in the form of a Marine O2 Sensor Adapter from the folks at Howell EFI. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. Sniper EFI Installation Guide. I had an injector fail after a month of running and called the tech line who helped me figure that out. The clamp-on that came with mine wasnt a good fit on my 2" pipe. 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. -- I particularly like the Daytona Sensors Approach to the Ignition Curve.- Are you pursuing Coast Guard Certification for the Sniper_EFi? I purchased the Holley HP MPFI system and went to the lake with it. 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. I tried holley tech support, no answer and put on hold for hours. watch the values in the software for the o2.. once is is done "Heating" and starts to show AFR, wrap the rag round it. I installed a Holley sniper system on my car and I've been fighting it for 2 weeks now. Everyone raving about customer service is telling the truth! What I don't want to do is spend more money on the headers than on the fuel injection upgrade and new propeller set. It will not fit on round or oval risers without a suitable flat area. Without Headers Steamers location (above) is perfect, up close to the engine where you have not lost much heat. 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. 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. Free ground shipping regardless of order size! If this could be disabled it would be much better. When either of these operating temperature ranges is exceeded, the sensor can no longer be . Holley EFI requires several pressure inputs in order to run an engine. I have a 74 bronco, 302, mild cam. Running? B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. 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. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. From there, the idea is that it will self-tune to the requirements of the engine. As far as a sensor goes, absolutely nothing. I'm 3" down from the bottom of the flange to center of bung. Wideband Oxygen Sensor Extension Cable. excessively rich mixtures), Mechanical shock (e.g. Add To Cart. May God's grace bless you in the Lord Jesus Christ. Jun 7, 2021. You must log in or register to reply here. Everything about the fuel prime shot can be adjusted. Yes! Jan 20, 2019. We may earn a small commission from affiliate links and paid advertisements. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. Sniper EFI 2300 Marine. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Bosch 17025 Oxygen Sensor #1 Best Seller . I have a local customer with a pair of big blocks in his offshore boat that is eager to get started on this. In Stock. The Sniper will do that. If I am reading your post correctly you are using two separate o2 sensors when using headers ? These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. Doesn't look like it will have an O2 sensor. The light shines in the darkness, and the darkness has not overcome it. For a better experience, please enable JavaScript in your browser before proceeding. Install the throttle linkage to the Sniper EFI throttle body. 2 Reviews. OT pipes may be out of the question, but with the water dumps put in at the transom, ala Gil or Rewarder OT pipes, you could get dry readings with bungs a little above where they bolt onto the logs, I would think. - You are currently viewing the forums as a GUEST. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. 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. To simplify . Staff Writer. Part # 554-155. 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. As always, your results may vary and batteries not included. 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. 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. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a "criss-cross" pattern (60-80 in.lbs.). Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. If the indicator reads "LOW Err" double check the connection to the CTS. Ordered another dominator Bosch from Holley and it matches perfect. $132.95. Aftermarket headers are pretty much the only safe way to run an O2 sensor. 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. GA - As close to the lake as I can afford A powerful, MICRO BlueTooth in dash audio solution! EFI System Pro also has a good bit of tech info on their website. Also the progressive link. Hopefully this one lasts longer than the original. The sniper fit perfectly on the intake. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. You will still get some water on the engine side of the snails, mainly at low Rs. Marc, you don't mention which system you installed but the Holley systems are fully configurable. I will be starting mine up this month, I hope it goes well, good luck to you. The other thing I want to overcome is the fuel return line; my harbor master says that I can connect my fuel return line to my CAV (lucas) gasoline filter, it has 4 connection, now only 2 are used. Note the temperature sensor mounted on the back of the driver side head in the above photo. There can be leftover debris from manufacturing that have been washed down and are now clogging one. Add to Cart . The Holley Sniper system sells for $999.95, installs in under 2 hours, and requires only an O2 sensor, a temp sensor (both included), an electric return-style fuel pump, and four-wires to connect.. Quote Reply Topic: Holley Sniper Posted: Jan/05/2022 at 2:01pm . Got a picture? I have also picked up another .5 gallons per hr to about 9.25 gph. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Conditions when closed loop o2 should be turned off. You are using an out of date browser. Holley 2300 is their nomenclature for a 2-bbl generic fitment carburetor. A forum community dedicated to performance boat owners and enthusiasts. The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. 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. It doesn't even mean that you can't do it. Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. As far as packaging goes, one comes in a Bosch box, the other in a Holley package. When buying the Holley Sniper EFI kit, you've got two basic options. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. Are you holding your RPMs back with the MSD for some reason? It flows 850 cfm and can support up to 650 horsepower. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . Capability Range: Moderate Those "flames" are still consuming O2 that would otherwise not be read by a sensor in the correct location. I installed a holley sniper kit. You are using an out of date browser. 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). I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. Did you use the Holley fuel pump and have you had any issues with it? It will crank and run great for 2-15 seconds then die. I installed it without O2 sensor, adjust on the fly. 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. EFI is the wave of the future. Holley EFI Oxygen Sensor. Plug into the coolant temperature sensor. If you are not running the latest software stop guessing and go download it. My question is concerning what happens a year later, when I have a top-end swap . 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? Welcome to Club Cobra! Was in marine engineering for years. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. What motor is this on? Some logs have water up to just short of the port. replaced my original terminator x sensor that was mounted in an exhaust that took on some water and killed the original sensor. Brand: Holley EFI Emission Code: 4 . I really dont want any issues on the whitewater lol I am happy with Holleys no hassle replacement of the parts. In this video Holley's own Tom Kise explains oxygen sensors and where to place an 02 sensor bung in your exhaust. looking at doing the same. So much it could be. 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. Holley recommends a 3/8" fuel supply line. HP comes from torque and rpm and rpm breaks things and increases wear. May 19, 2021. Then operate open loop with a fuel map\Timing curve.I am interested in the capabilities of the Sniper product (4 injector) in a Marine application.. 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. Thanks. The bottom line is that trying to run EFI on a marine engine is not something you can do as an afterthought. 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. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. 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. Master ASE tech since 91. Add to Cart . i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . 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. John 1:5, 1969 FJ40 2F with Holley Sniper EFI, Power Disk Brakes Front & Rear, Downey, Your post has peaked my curiosity. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Fuel economy went from 12.5 to 13.5 gph to 10 gph. Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. Advertising . 3. . Part# 554-155. Vega$69. Can anyone share their experiences with this type of setup? Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Items 1 - 21 of 21 Items. Next, the new unit was installed onto the manifold. 1985 fj60 (sold back to Toyota), 1997 fzj80, 1971 fj40 with 75 2F. #3. I also capped off the regulated return line with a hose, clamps, and chamfering bit. He had one there that was run on a dyno then the fuel map was set and shipped back. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. The ones in the Bosch box come without warranty. I am interested in upgrading both engines with Pertronix Ignitor or Ignitor II ignition and the Holley Sniper EFI 2300 and the Howell EFI marine O2 sensor adapter. Replacement Sniper and Terminator X O2 Sensor. Follow USCG rules about materials and fittings. . The Sniper EFI master kit contains the most complete EFI fuel system on the market. The fuel pump question is the tough one. 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. #1. Register now for free! 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. Free ground shipping regardless of order size! Holley's self learning system is a blessing and a curse. 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. The spark must be manually tuned. I am a competent mechanic and I have checked all the usual suspect items. For a better experience, please enable JavaScript in your browser before proceeding. The first thing to consider here (if you are in the USA) is US Coast Guard (USCG) Safety Approval. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. I'm using the NTK sensor. PS, Once someone has a good 270/350 tune, everyone can use it. Then if that doesn't work call the tech line they are great! . It works great where its at. Bolt on 4150 Flange Carburetor Replacement. I had questions on the suggested "Marine O2 Sensor Adapter" from Howell EFI (https://howellefi.com/product/adaptor-o2-sensor-for-marine-use/), but when I look to the pictures, I understand how it will work. Staff Writer. EFI EFI kit electronic fuel injection. Fine tuned the timing to 12-15 degrees. Had to replace the oxygen sensor on my car for the terminator x after the original one failed and this fixed all my problems. 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. Other? O2 sensors are water proof. Miami, FL. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. functioning controller during engine operation. 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). 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. 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.) You can selectively provide your consent below to allow such third party embeds. Increasing efficiency is always a good idea. Joe, where did you end up installing the o2 sensor on your setup? Part# 554-155. holley efi. Q1. 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. I installed the adapter and elbow so it's at an angle above the entry point. Copyright 2022 Holley Performance Products, Inc. All right reserved.

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