There is no problem getting this tuned and then running open loop. 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. check out the. For a better experience, please enable JavaScript in your browser before proceeding. 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. Holley Sniper Efi - Mean Chicken Jet Boat Forum Add To Cart. Any word on this? Has anyone run an O2 sensor in an EFI on a marine engine? quick fuel. The fuel lines and fittings are 3/8s with 8AN fittings and everything on the 60 requires 5/16 fuel line with 6AN fittings) Holley Sniper EFI 550-849 Holley Sniper EFI 2300 Self-Tuning Kit - Shiny Finish. Holley Oxygen Sensor O2 Bung Weld-In Style; Larger Image. Specs. And who can blame them? Holley Sniper EFI Returnless Master Kit - Black Ceramic 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. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). You must log in or register to reply here. Any exhaust down at engine level or lower will definitely get at LEAST some steam. Register now for free!) 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. After discussing it in this thread and talking with Holley's tech support, I decided . Fuel economy went from 12.5 to 13.5 gph to 10 gph. Not always the case with a boat. Installing MegaSquirt in Parallel With the Stock ECU Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. 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. This boat has a non-vortech motor with a 2 bbl gm intake i'll need to replace. Pay close attention to the instructions on O2 sensor placement. Stock manifolds? 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. I recently installed the sniper setup on my stock 71 duster 340 4 speed. Yes, this is an old thread, but it's an old unit. If you are not running the latest software stop guessing and go download it. Other? Similarly, no multi-point fuel injection (MPFI) systems existed that were USCG approved. Warranty Information. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. When problem-solving this type of issue, consider when and how you could use a work-around. Fortunately, it turns out there are some options. O2 Sensor in a boat exhaust | Performance Boats Forum Price Point: $$$. The Sniper EFI throttle-body drops in place of your . 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. Aug 17, 2013. In order to do this, it heavily relies on proper O2 sensor placement. You can selectively provide your consent below to allow such third party embeds. Replacement Sniper and Terminator X O2 Sensor. This product works with Holley EFI wideband oxygen sensors, part numbers 554-100 and 554-101. PDF Holley Sniper Installation Supplement *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. Holley EFI Oxygen Sensor. 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? 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. Brand: Holley EFI Emission Code: 5: Material: . I have a 74 bronco, 302, mild cam. No worse than taking the reading in the intake manifold cross over. Douglas Cline. watch the values in the software for the o2.. once is is done "Heating" and starts to show AFR, wrap the rag round it. 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. . 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. Add To Cart. I did--- Save your money and piece a fuel it together. Was in marine engineering for years. Bolt-on carburetor style EFI for your classic car or truck. Holley 554-100 NTK Wideband Oxygen Sensor. While the Sniper has an absolutely outstanding internal ECU, the current model does not offer any laptop programmability. AFR was 19 area. I installed a holley sniper kit. Newer ECMs have all the options to configure these functions. Is Holley working on a complete marine package or planning to in the future? Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. Holley sent him a new one for free. Pink switched power wire, this needs to be connected to a point that is 12V in run and while cranking. B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. No prime, but a second later it's ready to crank 'normally'. It does not look like anything particularly superior in concept. Are you running the entire system? functioning controller during engine operation. Install the throttle linkage to the Sniper EFI throttle body. Thanks for that, Danny. I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. Items 1 - 21 of 21 Items. Thanks for the heads up. Sniper EFI 4bbl Marine. looking at doing the same. All of the wiring exits below the rear fuel injector cover, for a completely stealth installation. This requires removing the plug with a breaker bar, and using a 1/2 NPT to 3/8 NPT adapter to mount the Sniper sensor. Why? Sort. Note, that is not a crack in the exhaust manifold, just a shadow from a casting flaw. Most water jacketed header manufacturers (Lightning, CMI, etc) will install 02 bungs in their headers for extra money. They are about 4 inches long, in-line between the log and manifold. 534-199. Engine Startup Tuning for Sniper and Terminator X Stealth Owners Holley EFI 554-155 Holley EFI Oxygen Sensor Holley sniper help!!!! | ClassicBroncos.com Forum 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. It works great where its at. 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. So much it could be. Holley part number 554-155. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Conditions when closed loop o2 should be turned off. On a side note: Im getting 4200 rpms at 5000 elevation with stock heads. I've dunked mine lots of times. Sniper EFI 4bbl Marine. For the most part, the small harness is plug-and-play. The spark must be manually tuned. I myself will convert my 2 302's (Volvo Penta 5.0 l AQ231A) from carbs to EFI; I must find out everything before I start work on the engines, then I am satisfied to start. Late to the party but here's where mine are installed. I have tried several different settings to get it going, no luck. O2 sensor placement is critical for getting your engine to read the oxygen in the exhaust correctly and can directly impact the performance of your new EFI installation. Troubleshooting Holley Sniper that hesitates on acceleration (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Top 10 Sniper EFI Installation Tips from Holley's Tom Kise 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? Q1. Mike. All of the wiring begins at the throttle body and connects outward from there. Some parts are not legal for use in California or other states with similar regulations. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Get fast, Free Standard Shipping on orders over Summit Racing Equipment from $99 -- no shipping, handling, or rural fees! Advertising . PS, Once someone has a good 270/350 tune, everyone can use it. Holley EFI Oxygen Sensor. WBO2 Sensor 17025 Bosch 554-155 Holley - EFISystemPro.com blue doberman puppies. 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? For now I have a genuine bosch O2 and Standard Automotive TPS installed. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. Could show a lean condition when in fact it really isn't. This fixed the high throttle position sensor reading (TPS) of above 1% that likely caused my idle issues. You are using an out of date browser. Have engine apart and head checked and cleaned at machine shop. This free oxygen is picked up by the O 2 sensor and determined to be indicative of a lean AFR condition when, in reality, the engine could potentially be running slightly rich. Advanced throttle body injection systems capable of transmission control and more. Holley Sniper EFI Oxygen Sensors 554-155 - Summit Racing Equipment 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. Register now for free! Welding in an O2 Sensor Bung for a Holley Sniper EFI System The Sniper will do that. *Possible delays due to Covid-19 click for more information. I would send an Email to Chris at EFIsystempro. replaced my original terminator x sensor that was mounted in an exhaust that took on some water and killed the original sensor. No one cares about your buddies old antiquated garden hose technology. My spare "Bosch O2 Sensor" came from eBay & was half the price of anywhere else I found. "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. 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. Because the fuel maps are built on a speed-density (ie, engine RPM versus manifold air pressure) fueling strategy. I know from some of the other posts, there have been WBO2 sensor issues. Only a few hours on the motor but so far so good. Holley Sniper EFI Wideband Oxygen Sensor. It does not work with the Sniper EFI oxygen sensor. While those work great on an automobile, you likely won't begin to get these marine installations setup with a handheld. Make sure to put anti seize on the threads. Find a lower price anywhere and we'll beat it by 5%! 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. What is your fuel pressure at the carb during crank? I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. Great Article. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. Will I be able to control my ignition timing with the Sniper? Free ground shipping regardless of order size! Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. Waiting for spring to put back together. Got a picture? But MAP sensors are very easy to physically implement and are inexpensive. Sniper EFI 4500 Marine. This page was generated at 08:35 AM.