Aftermarket headers are pretty much the only safe way to run an O2 sensor. Holley EFI Oxygen Sensor. I wanted to let you all know, I have modified a mercruiser Cool Fuel Gen 3 module(mounted on the engine) to provide fuel to a sniper. I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. 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. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. Similarly, no multi-point fuel injection (MPFI) systems existed that were USCG approved. Everything about the fuel prime shot can be adjusted. Yes! Good luck! When buying the Holley Sniper EFI kit, you've got two basic options. holley sniper efi Holley Sniper EFI Self-Tuning Master Kit - Black Ceramic Finish $1,475.95 Part# 550-511K holley efi 100 PSI Stainless Pressure Sensor $155.95 Part# 554-102 Are you waiting to convert your carbureted vehicle to Sniper EFI, but don't like the idea of mounting an external fuel pump? Conditions when closed loop o2 should be turned off. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . pull the sensor out of the exhaust. All sensors are tested to ensure they accurately report critical engine data to the . I will change and be using an in-tank pump when I install the new 120 gallon tank this winter. CUSTOM ART FOR CUSTOM NEEDS. 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. Add to Cart . Marc, you don't mention which system you installed but the Holley systems are fully configurable. 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. 10 min read Video. 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. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Prime cannot be adjusted on this old unit. Tune the delay relay timing to just miss the prime shot.For cold starts, a simple push-button or switch "choke" override to power the relay during prime would provide it. No, use only one 02 sensor, mounted close to exhaust manifold, or high up on a Header collector, not into a single Header pipe that merely gets a exhaust pulsation. Brand: Holley EFI Emission Code: 5: Material: . Part # HM206. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. It does not look like anything particularly superior in concept. I've got the Howell EFI adapter installed in the riser of some standard Inboard Manifolds and it works great. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. Let him re-jet the carb (a wee bit on the fat side for safety) and reset the timing and try again. If this could be disabled it would be much better. Still needs a EFI pump and return line. Welcome to ClassicBroncos! . The truck started fine after install, and ran down the road ok. Most of Holley's EFI systems provide a Setup Wizard that builds a base configuration file that allows you to start the engine and operate the vehicle. But you have to get it tuned. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Capability Range: Moderate I have a boat with twin 3.7 Mercruisers. I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. Other? This requires a considerable additional investment but as long as you're doing things you're not going to do them half-way, right? Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. 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. Sniper EFI 2300 Marine. Sensors that are installed in an exhaust must be connected to a properly Who knows. This page was generated at 08:35 AM. 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. Look at the bottom.. Holley Sniper EFI Oxygen Sensors 554-155 Note that this is a different sensor than Holley uses for their Dominator/HP/Terminator/Avenger series. You'll also notice that the firing order is 1-6-5-4-3-2. Holley sent him a new one for free. 3. For a better experience, please enable JavaScript in your browser before proceeding. Search for the cheapest hotel deal for O2 Hotel Taipei Main Station in Taipei City. $43 per night (Latest starting price for this hotel). The problem is with the Holley computer when you turn on the keyit squirts a prime for a split second. so far so good love the smooth power and easy starts. so simple check first, whats the fuel pressure? Much of the system is encased right inside the throttle bodyand that includes the ECU. I have a 74 bronco, 302, mild cam. 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. $5 Off Your $100 Mobile App Purchase . Thanks for the compliment--we look forward to your feedback! Holley EFI Oxygen Sensor. Once you have those points set, the rest of the map doesn't really matter, just make it look smooth/pretty and everything will be fine. Are you running the latest software? I had the pink ecu signal wire connected to a bullet connector on the passenger side . Next, the new unit was installed onto the manifold. check out the. They have been working out well for a few years now. Are you running the entire system? You must log in or register to reply here. Does an yone have a pic of the O2 sensor in their exhaust? 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. The Sniper EFI throttle-body drops in place of your . 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. Fuel economy went from 12.5 to 13.5 gph to 10 gph. Ideally I'd want the power plant running as efficiently as possible, but I'd sure like the benefit of EFI over carb. Free ground shipping regardless of order size! Advanced throttle body injection systems capable of transmission control and more. The fuel module is self contained with water jacket cooling and contains the low and high pressure pumps. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . 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. The adapter will be fastened in both metal parts so that no water will reach the 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. . I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. i thought about it, but after $3400 on an EFI alone and an entirely new rigged boat Im having a hard time forking out another 2000 for an exhaust when I may just do an open loop My buddy machined up a set of spacers I sketched out for him. Holley sniper issue on newly rebuilt motor, Holley Sniper with Duraspark and timing control. 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. I am a competent mechanic and I have checked all the usual suspect items. KAYAK searches hundreds of travel sites to help you find and book the hotel deal at O2 Hotel Taipei Main Station that suits you best. Holley Sniper O2 sensor replacement. Replaced and gapped to .45 all spark plugs. Never tried it myself or know anyone fwho has, but Little kids play hooky . big kids play. Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. Phil is right. It works great where its at. After discussing it in this thread and talking with Holley's tech support, I decided . 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? There was a 1.5 point difference in afr between banks. Pay close attention to the instructions on O2 sensor placement. These types of adjustable on-delay timer relays are on sites like Amazon for less than $10 up to $15. watch the values in the software for the o2.. once is is done "Heating" and starts to show AFR, wrap the rag round it. We use cookies to enhance your experience while using our website. It just means that if you are thinking you'll install this, crank it, and pull away from the dock with complete success you might be in for some disappointment. But this also makes me wonder what you did for the O2 sensor. New 100 owner, long time cruiserhead - https://forum.ih8mud.com/threads/new-100-owner-long-time-cruiserhead.1300238/. . 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. The very front would be the safest place. It will crank and run great for 2-15 seconds then die. It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. No one cares about your buddies old antiquated garden hose technology. It appears that its a tuning issue. 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. 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. View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. I'm looking for some more practical and scenario-specific advice; that's one small piece of it. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. Greatest struggle is the shift interrupt. Holley Sniper EFI Wideband Oxygen Sensor Part Number: 510-554-155 Click image to zoom $125.99 More than 10 available Lowest Price Guarantee Sniper EFI Wideband Oxygen Sensor Replacement Part for Holley Sniper EFI and Terminator X Systems Bosch LSU 4.9 See more product details Free Shipping - Ships Today QTY Add To Cart Add to Wish List The Sniper needs a "clean" 12V wire that is hot in Start and Run. Holley recommends a 3/8" fuel supply line. 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. I will get a new 02 sensor before I swap back to the orange box. HP comes from torque and rpm and rpm breaks things and increases wear. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. 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. My first install was on a stock manifold and I installed it in about the same spot Steamer (above) did, except 180 degrees the other way, facing towards the front of the vehicle. 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? 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. Find a lower price anywhere and we'll beat it by 5%! I tried holley tech support, no answer and put on hold for hours. Part# 554-155. On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. Search for O2 Hotel Taipei Main Station discounts in Taipei City with KAYAK. Holley EFI has the solutions you need to get your project up and running better than ever! Part Number: 510-554-155. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). Sniper EFI Quadrajet Marine. Find a lower price anywhere and we'll beat it by 5%! the engine not running. - You are currently viewing the forums as a GUEST. I have searched thru the forum as much as I can, with not much luck.