running holley sniper without o2 sensor

It appears that its a tuning issue. My boat is still in winter storage. On my system, I machined in the O2 sensor right between the snail and the manifold of a . Other? Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. I installed a Holley sniper system on my car and I've been fighting it for 2 weeks now. 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. My hand is holding the connector to the sensor. Runs like a champ now. 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. A forum community dedicated to performance boat owners and enthusiasts. This doesn't mean it can't be done. Capability Range: Advanced 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. Features: . As far as spark control, the Sniper will let you tune those 4 points, nothing else will. The O2 sensor burned out immediately. Holley Sniper EFI Oxygen Sensors 554-155 Holley sniper issue on newly rebuilt motor, Holley Sniper with Duraspark and timing control. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. 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. Some logs have water up to just short of the port. Bolt on 4150 Flange Carburetor Replacement. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . quick fuel. To take advantage of all the site features, please take a moment to register. I am happy with Holleys no hassle replacement of the parts. In the case of the car, you can generally get out and walk (run?) I think I could run more boost but it's a real hand full right now. EFI EFI kit electronic fuel injection. Yellow Init In First shown for an instant when the system is powered on. I've seen O2 sensors in water jacketed headers that have worked fine for years. Precisely Adam. These often don't work with stock ECUs, so your best bet is to weld in a second bung for the wideband sensor. YES! Price Point: $$$. 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. O2 Sensor Mounting: The O2 needs to be mounted 6-8" after the merge in the header collector. Capability Range: Moderate Thanks again for writing! The sniper fit perfectly on the intake. Is Holley working on a complete marine package or planning to in the future? Can more detail be provided? . Car runs perfect . Plug into the coolant temperature sensor. running holley sniper without o2 sensorplymouth township mi police scanner. $5 Off Your $100 Mobile App Purchase . Spray a rag down pretty good with brake cleaner. Advertising . Follow USCG rules about materials and fittings. Staff Writer. I was mocking it up at the time. Is the O2 sensor on the dyno must have a very long pipe extending past where it is positioned or backwash from the room air will violate the readings as well as any header leaks. Installed the sniper/MSD combo on my mildly built 460 KEM. 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? 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. 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. I will get a new 02 sensor before I swap back to the orange box. (If I am incorrect I heartily invite your comment at the bottom of this article!) 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. Anti-Seize pre-applied to sensor threads. Customer Rating: 4.3 out of 5 stars: 4.5 out of 5 stars: Fortunately, it turns out there are some options. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Holley sent him a new one for free. Holley EFI has the solutions you need to get your project up and running better than ever! Good luck! (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). non biased Shelby Cobra related site! Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. PS, Once someone has a good 270/350 tune, everyone can use it. Full time feedback from the sensor is what the computer uses to refine the fuel table. Thanks. 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 worse than taking the reading in the intake manifold cross over. However, advanced tuning software is available for the Sniper EFI System that allow them to be tuned by a competent professional with experience tuning marine applications. We may earn a small commission from affiliate links and paid advertisements. It could be an instant fix. Super helpful and knowledgeable. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Sep 14, 2021. Powering the Sniper, There are three wires that need to be connected to power on the Sniper, Red and Black main power wires, these need to be run directly to the battery and have a solid connection. One comes in the form of a Marine O2 Sensor Adapter from the folks at Howell EFI. This is the 02 sensor adapter I used. It is possible for the ECU to have an internal failure that can kill O2 sensors. Great Article. HP comes from torque and rpm and rpm breaks things and increases wear. I recommend popping for the Master . Search for the cheapest hotel deal for O2 Hotel Taipei Main Station in Taipei City. Visit their website for more details. Installed a Lokar throttle linkage bracket custom made for the Sniper, removing the old one that had been on my Holley 750. Specs. I found this in the instruction manual for the older commander 950 system. I am a competent mechanic and I have checked all the usual suspect items. Sniper EFI Releases new Stealth 4150 Models! 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? After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. Restore | Make | Philosophize | Eat | Drink | Be Happy | Let's Go Brandon! the motor has the following mods, Aluminum heads, Performer intake, Sniper and MSD ignition module. 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. Maybe this one has a shorter cable? replaced my original terminator x sensor that was mounted in an exhaust that took on some water and killed the original sensor. It does not look like anything particularly superior in concept. CTS (Coolant Temperature Sensor) - Reads engine temperature. Wherever you go, the cultural kaleidoscope of Taipei showcases exhilarating diversity. Could show a lean condition when in fact it really isn't. Phil is right. Sort. I have searched thru the forum as much as I can, with not much luck. Holley's self learning system is a blessing and a curse. As far as warranty goes, Holley products are covered by a 90-day warranty against defect in material or workmanship. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. The Fora platform includes forum software by XenForo. What Is Pinion Offset, And How Does That Affect You? 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. Add to Cart . I will let you know what happens. 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. It only runs rich on start up for a second due to the prime, after start it runs great. If this is a first time effort, find a tuner in your area with marine experience. Install the throttle linkage to the Sniper EFI throttle body. Other countries likely have simmilar approval processes for marine engines. Replaced and gapped to .45 all spark plugs. Posted By : / actual instructions in flowcharting are represented in /; Under :nose exercise before and afternose exercise before and after (probably with the edelbrock marine 2506 intake). 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. I have also installed a sniper system on a 350 Mercruiser and was wondering if you have done any tuning on yours yet? The engine floods and it is embarrassing when leaving a lock. The fuel pump question is the tough one. A replacement clamp on would be an easy change out. While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. But it is going to be a little tricky. 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. Maybe going all the way to the front is the way to go? Capability Range: Moderate . Register now for free!) Part # 554-155. The Sniper EFI throttle-body drops in place of your . 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. For a better experience, please enable JavaScript in your browser before proceeding. Good luck to all. Are you running the latest software? This fixed the high throttle position sensor reading (TPS) of above 1% that likely caused my idle issues. That's great--we look forward to your results! The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. Add to Cart . 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. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. 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. Sniper EFI 4bbl Marine. Ran about 5 seconds and died. For the most part, the small harness is plug-and-play. You are using an out of date browser. 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. The plan is to 'learn' a fuel\Timing curve with a closed loop. For a better experience, please enable JavaScript in your browser before proceeding. Add to Cart . You must log in or register to reply here. 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. A third option would be to run your EFI system without an O2 sensor at all. I was thinking aluminum heads would run it up closer to 5,000 rpm. Ive got a set of bassett headers for a BBC, ill see if they can fit under the transom. Thanks guys. Replacement Sniper and Terminator X O2 Sensor. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. You have to angle it to help the throttle cable get around the booster. Thanks for the compliment--we look forward to your feedback! 1985 fj60 (sold back to Toyota), 1997 fzj80, 1971 fj40 with 75 2F. : For registered members this ad will NOT show. Everyone else was backordered several months. Howell indicates that this adapter was designed for the Chevy type Mercruiser manifold but that it should work on any similar marine wet manifold. . Otherwise I have to check for a place in my gasoline tank to put the lines in. Have you visually verified that all your injectors are spraying? That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery. If you let it cool down again, does it start up fine? Miami, FL. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. Introducing Sniper EFI Master Kits, with a Returnless Retrofit Fuel Module. JavaScript is disabled. 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. Maybe my manifolds leaked the inside between the snail and the log?? Sorry for the late reply. Was in marine engineering for years. 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. 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. Not sure how well the sensor likes being that close to the port. On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. The wiring was a bit of a mess. I did--- Save your money and piece a fuel it together. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. With a bad TPS you will have to manually prime to try and get it . Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. Specs. Categories. Register now for free! This was for MPFI. 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. Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. Brand: Holley EFI Emission Code: 4 . 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. . Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. 100% identical. 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. Bosch 17025 Oxygen Sensor #1 Best Seller . 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. 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. Just a rumor. This page was generated at 08:35 AM. So far so good. After discussing it in this thread and talking with Holley's tech support, I decided . I have a 74 bronco, 302, mild cam. So I bought the progressive linkage but you then have . Categories. Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. If you've done some automotive fuel map tuning before, you can likely overcome this challenge. QFI-500 Oxygen Sensor. Stay up to date with the latest releases, events, promotions and more. May 19, 2021. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. Initial Calibration in Basic Configuration. I have installed the Holley hp efi MPFI on my twin inboard mercruiser 350ci 270 hp. The ones in the Bosch box come without warranty. Thanks for that, Danny. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. I just installed a Sniper on a 67 GTO and it was pretty straightforward, the end result was a much better starting/smother running car, than can adapt to elevation changes better, But we also installed the Holley Dual sync distributor for a complete system that adjusts timing as well. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. Use a return fuel line. Also in Tools, Shop Equipment & Chemicals, Cataclean - Fuel and Exhaust System Cleaner, Cataclean Diesel - Fuel and Exhaust System Cleaner, Distribution Blocks, Filters, Adapters and Fittings, Microswitch and Solenoid Mounting Brackets, Holley EFI CAN to USB Dongle - Communication Cable, Hooker BlackHeart Oxygen Sensor O2 Bung 2.5" Clamp-On Style, Holley EFI Terminator X Wideband Adapter Harness, Earl's Oxygen Sensor Weld Fitting (Weld Bung) - Steel. Pay close attention to the instructions on O2 sensor placement. The following vehicles are considered Racing Use Only Vehicles: Holley is the new standard in EFI! Prime cannot be adjusted on this old unit. 2 Reviews. 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. Add To Cart. I'm about to embark on the same type of project. We can hear the initial fuel spray into the body, but it appears that its not enough to start the engine while hot. 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. The first option is to just buy the injector body and the controller with the wiring harness and sensors. Capability Range: Professional I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. Without the engine running, AFR will read 35.6 The fuel pump will run off a relay in the sniper harness (blue wire) pink wire gets switch/run power to the relay. 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. 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. The engines are rated at 170 hp each. In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. Then they had it repaired and back to me in 5 business days. Holley EFI Oxygen Sensor. Yellow Cold! The Sniper will do that. You can selectively provide your consent below to allow such third party embeds. So there is at least some probability of success. - You are currently viewing the forums as a GUEST. What is your fuel pressure at the carb during crank? EFI is the wave of the future. This is great information that can only get you closer to an ideal solution. You really want a bigger engine. In Stock. I have also picked up another .5 gallons per hr to about 9.25 gph. I'm guessing by snail, that's another name for the riser? . Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. There is no problem getting this tuned and then running open loop. USCG approval is certainly worth careful consideration, as being on a boat that catches on fire is even more serious than being in a car that catches on fire. away. I will keep the replacements as spares. Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. Part# 550-511. A 90-degree V-6 has three shared crankpins set 120 degrees apart. I installed the adapter and elbow so it's at an angle above the entry point. Part# 50-5009QFT. Add to Cart . . If the indicator reads "LOW Err" double check the connection to the CTS. Found out that it was due to rfi/emi. . 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. 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. It has about 18 hrs to date and is working great. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. http://s621.photobucket.com/albums/tt291/Mark11530/?action=view¤t=MAH05771.mp4, http://www.holley.com/data/Products/Technical/199R10226.pdf. Holley EFI Oxygen Sensor. I've dunked mine lots of times. If there's anyone willing to read a bit and offer advice about what to do when doing a top-end swap (when you may be in a scenario with a new top-end that's the EFI isn't calibrated for AND you can't have an WBO2 sensor connected), please let me know. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. 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.

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