EFI System Pro also has a good bit of tech info on their website. Was told by holley tech support to make adjustments to the fuel prime percent and multiplier settings, played with those with no major improvement. You are using an out of date browser. Similarly, no multi-point fuel injection (MPFI) systems existed that were USCG approved. Next, the new unit was installed onto the manifold. Sorry for the late reply, Douglas. Hi all, i'm contemplating doing a sniper quadrajet swap onto my volvo penta 5.7 GL 2bbl holley motor in my 1997 cobalt 200 with the DP-S outdrive. It will crank and run great for 2-15 seconds then die. CTS (Coolant Temperature Sensor) - Reads engine temperature. However, overcoming that whole idle/off-idle transition (mentioned above) is going to be the challenge. Car runs perfect . The opposing pistons share a crankpin the way they do in a V-8, but the fact that there are only three cylinders on each bank means that the plugs fire at 90-150-90-150-90-150 intervals. 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. The sniper fit perfectly on the intake. I would back-burner the ignition control questions until you get the fuel injection working. The adapter will be fastened in both metal parts so that no water will reach the O2 sensor. In a horizontal or if pointed upwards it can collect exhaust condensation liquids upon start up. Had to replace the oxygen sensor on my car for the terminator x after the original one failed and this fixed all my problems. It's a compact HP pump and cooler assembly. Late to the party but here's where mine are installed. What motor is this on? 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. Replacement Bosch Wideband Oxygen sensor for Sniper EFI and Terminator X systems. Since your existing low-pressure fuel system is not going to work with the Sniper EFI System this puts you in the unenviable position of choosing between USCG compliance or EFI. I tried holley tech support, no answer and put on hold for hours. 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. I don't have enough experience with marine applications to know exactly what it will take to solve this. That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. Shop Oxygen Sensors at Summit Racing. Add to Cart . Initially I was looking for the upgrade to a 4V holley 4175 carb, but this option has peaked my interest. 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. This Video Shows Ideal O2 Sensor Placement! Some parts are not legal for use in California or other states with similar regulations. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. 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. Thanks again for writing! And who can blame them? 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 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 . I've dunked mine lots of times. Any word on this? $5 Off Your $100 Mobile App Purchase . In the end I ended up using a Fuel Control cell made by Pleasure Craft Marine for their 351W engines. The included fuel system places a 340LPH fuel pump in the tank, which can easily be . 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. You should then have at least 18-24" of pipe after the sensor. Holley EFI has the solutions you need to get your project up and running better than ever! Free Shipping - Holley Sniper EFI Oxygen Sensors with qualifying orders of $99. I will get a new 02 sensor before I swap back to the orange box. Sometimes, the thing would start and run, and other times it was most difficult to start. What is your fuel pressure at the carb during crank? Holley EFI Oxygen Sensor. Initial Calibration in Basic Configuration. 2014 FJ Cruiser - White - 4X4 - Loaded - . It works great where its at. :-), I started using OMC and Volvo Penta pumps for my conversion. Add to Cart . Tech Resources. See Details. *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Yeah, it may sound hokey to some, but is just one option to solve the issue where you are and with what you have. I have not had it on the dyno with the sniper, but would guess probably about 400 to 410 hp and well over 500 tq.I did use the holley pump that came with the sniper. From there, our highly trained factory refurbish technicians flow the original fuel injectors. Holley Sniper EFI Oxygen Sensors 554-155 Sniper EFI Releases new Stealth 4150 Models! Thanks for the feedback on this adapter, Donald. It does not look like anything particularly superior in concept. Note, that is not a crack in the exhaust manifold, just a shadow from a casting flaw. All sensors are tested to ensure they accurately report critical engine data to the . Not always the case with a boat. You have to one big hole in the riser, then you reach the cooling water, and one little hole in the next part of metal: now you reach the exhaust gasses. But this also makes me wonder what you did for the O2 sensor. It appears that its a tuning issue. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. 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. But it is going to be a little tricky. excessively rich mixtures), Mechanical shock (e.g. Sniper EFI 4bbl Marine. Mike. Does an yone have a pic of the O2 sensor in their exhaust? This really applies to any O2 sensor regardless of EFI system. In order to do this, it heavily relies on proper O2 sensor placement. 5. So I bought the progressive linkage but you then have . i'm not aware of a universal aftermarket EFI fuel pump kit that is USCG approved. The engine floods and it is embarrassing when leaving a lock. 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. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. 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. 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. It should be pretty straight forward what each of these values do. The plan is to 'learn' a fuel\Timing curve with a closed loop. EFI System Pro had everything I needed for my EFI upgrade. It does not work with the Sniper EFI oxygen sensor. Dec 28, 2016. The truck started fine after install, and ran down the road ok. 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. Greatest struggle is the shift interrupt. running holley sniper without o2 sensorplymouth township mi police scanner. The Sniper EFI master kit contains the most complete EFI fuel system on the market. Brand: Holley EFI Emission Code: 5: Material: . So much it could be. Why? That would be for individuals that run the OEM exhaust manifold, as well as individuals that run headers. I will let you know what happens. The spark must be manually tuned. It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. 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. 2 Reviews. 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.) 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. 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. Holley EFI Oxygen Sensor. Bolt-on carburetor style EFI for your classic car or truck. Other countries likely have simmilar approval processes for marine engines. 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. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Bosch 17025 Oxygen Sensor #1 Best Seller . 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. 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. The clamp-on that came with mine wasnt a good fit on my 2" pipe. It may not display this or other websites correctly. May 19, 2021. So far so good. 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. The very front would be the safest place. Stock manifolds? The engine RPM when closed loop o2 will begin. 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. No one cares about your buddies old antiquated garden hose technology. Only a few hours on the motor but so far so good. In this case, the prime shot is good for cold, but too much for warm. This page was generated at 08:35 AM. On my system, I machined in the O2 sensor right between the snail and the manifold of a BBC. Then if that doesn't work call the tech line they are great! Enter The 2023 LS Fest West Trip Sweepstakes Today And Join Us In Las Vegas! Part# 554-155. holley efi. Sniper EFI 4500 Marine. Full time feedback from the sensor is what the computer uses to refine the fuel table. Holley sniper issue on newly rebuilt motor, Holley Sniper with Duraspark and timing control. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Are you running the latest software? Mine is right where Steamers is, and works well with my AFI TBI. 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. Categories. Some logs have water up to just short of the port. (Assuming it actually releases in November and there are enough units for me to purchase and receive one in December). Good luck to all. He had one there that was run on a dyno then the fuel map was set and shipped back. 3. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. 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. The O2 sensor burned out immediately. Wherever you go, the cultural kaleidoscope of Taipei showcases exhilarating diversity. test the sensor.. for a basic pass/fail of the sensor. Follow USCG rules about materials and fittings. You can selectively provide your consent below to allow such third party embeds. All I can say is it made a completely different motor out of the 460, 39 degrees out and starts within 2 revolutions power is super smooth throughout the rpm range (idle to 4100rpms 212 Hamilton with 4.0 turbo impeller) has about 6 hrs of learn time. Menu. 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. you don't want to read that loss. 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. Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. $108.95. The wiring was a bit of a mess. Holley 554-100 NTK Wideband Oxygen Sensor. We may earn a small commission from affiliate links and paid advertisements. Ive got a set of bassett headers for a BBC, ill see if they can fit under the transom. I have a 74 bronco, 302, mild cam. I want to remove the old fuel injected Mercruiser factory EFI on both engines because they have begun to be troublesome. Seems to have more low end tq and is much smoother power through out the rpm range. I've been building a TBI system from GM parts to use on a 1987 Wellcraft with the Mercruiser 4 cylinder engine. So please, If you have problems registering or can't log into your account, please. If you let it cool down again, does it start up fine? As far as warranty goes, Holley products are covered by a 90-day warranty against defect in material or workmanship. 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. $102.95. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. I am a competent mechanic and I have checked all the usual suspect items. Its the Holley Pro Jection TBI mentioned by the above poster. Oxygen Sensor, Replacement, Sniper EFI, Terminator X, 3-wire, Thread-in, Each See More Specifications | Check the Fit. Sponsored Links (REGISTERED USERS DO NOT SEE THIS POST/AD! HP comes from torque and rpm and rpm breaks things and increases wear. 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. I received my replacement TPS and O2 sensor. Plug into the coolant temperature sensor. Joe, where did you end up installing the o2 sensor on your setup? Have you visually verified that all your injectors are spraying? Holley EFI Usb/Can Harness, Sniper Tbi. The throttle body has a built in fuel pressure regulator set at 58.5 psi. 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. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! Advanced throttle body injection systems capable of transmission control and more. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. "Old Yeller" gets Holley EFI Sniper O2 Sensor Installedhttps://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_stealth_4150/sniper_. Also some tips on preventing O2 sensor damage Be sure to disable autotune and remove the O2 sensor before it dies. Note the temperature sensor mounted on the back of the driver side head in the above photo. Bolt-on carburetor style EFI for your classic car or truck. If a cruiser with enclosed engine compartment, not a lot you can do to eliminate water or at least water vapor in the exhaust. a leading manufacturer of aftermarket Wideband O2 sensor kits, the following may damage or destroy oxygen sensors: . Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. 100% identical. I will keep the in-line pump for a spare. Service Oxygen Sensor for Sniper EFI Systems, Service Oxygen Sensor for Terminator X Systems. I'll let you know how it works out. Is Holley working on a complete marine package or planning to in the future? The ones in the Bosch box come without warranty. Assuming that your current ignition works well with the marine carburetors it will continue to work well with the Sniper EFI System. Holley EFI has the solutions you need to get your project up and running better than ever! 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). Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. 92 YJ 4.0, AX-15 5spd, np231, dana 30 front, dana 35 rear. And the relay and fuse were mounted along the firewall. After a few tries by jumping the starter solenoid I then realized the ignition key was in the off position. Put an end to cold start issues, hesitations, vapor . . Essentially, when I push the clutch in and ease on the brakes to coast up to a stop light, the AFR goes lean (18:1 or so) and the engine stalls. Master ASE tech since 91. OP, the Edelbrock system looks to use the same basic sensors as the Holley sniper system: TPS, MAP and O2, plus a few supporting sensors. One of the benefits of using any Holley EFI system is that it self learns and tunes on its own. Once the tune is complete, the O2 sensor can be defeated or . Search for the cheapest hotel deal for O2 Hotel Taipei Main Station in Taipei City. Part # HM206. The truck started fine after install, and ran down the road ok. Howell indicates that this adapter was designed for the Chevy type Mercruiser manifold but that it should work on any similar marine wet manifold. 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. Bolt-on carburetor style EFI for your classic car or truck. Capability Range: Advanced I have a 74 bronco, 302, mild cam. Capability Range: Moderate Sort. Has anyone run an O2 sensor in an EFI on a marine engine? 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? Do you offer a USCG fuel pump kit? Holley EFI Oxygen Sensor. Look at the bottom.. I only have a stick welder and didn't trust myself on the thin pipe so I brazed it in. I have not yet got it figured out. Fine tuned the timing to 12-15 degrees. Bolt on 4150 Flange Carburetor Replacement. Having selecting USCG-approved components, and sourced your O2 sensor adapter, there is but one more challenge--tuning. MAP Sensors. Conditions when closed loop o2 should be turned off. Maybe this one has a shorter cable? turn on the ignition.but do not start the engine. It looks like another season has come and passed by without the answer you wanted on this.I am impressed that you made the leap into marine fuel injection but you have experienced the same problem that everyone else who has tried this has faced. 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. When either of these operating temperature ranges is exceeded, the sensor can no longer be . You must log in or register to reply here. but I'm finding when running engines with holley sniper kits the the engines are very eratic ,the air fuel numbers are always changing drastically from one pull to . Those "flames" are still consuming O2 that would otherwise not be read by a sensor in the correct location. Q3. Items 1 - 21 of 21 Items. Maybe my manifolds leaked the inside between the snail and the log?? I hope that the next F/2F header is more O2 sensor friendly. Adam. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. 02/25/2020. You must log in or register to reply here. - You are currently viewing the forums as a GUEST. Sniper EFI 2300 Marine. Runs like a champ now. The test run was great, they have never run so well even when they were new with carbs. I will be starting mine up this month, I hope it goes well, good luck to you. 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. If the indicator reads "LOW Err" double check the connection to the CTS. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. #1. I upgraded from terminator x Maxx to dominator.. bought a 2nd o2 sensor kit with Bosch sensor and used an off the shelf Bosch I had been using with terminator. . 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. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. 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. 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. What you are able to accomplish with a Sniper is done exclusively through the setup wizard application on the 3.5-inch handheld.The Temrinator is designed to be set up with it's own setup wizard on the same 3.5-inch handheld display--but since it has a stand-alone ECU, it can also be fully programmed via the Holley laptop software. There is no problem getting this tuned and then running open loop. Yellow Cold! If this could be disabled it would be much better. That sounds like one solution. 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? By bypassing the built in pressure regulator in the fuel module(allowing full flow and pressure), using 3/8 hard lines to/from the sniper to meet CG rules( no soft lines on the engine block)using the snipers fuel pressure regulator, This is as close as I can come to safe. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. On EFI systems such as Holley's Sniper, all of the EFI sensors (except for the O2 and coolant temperature sender) are mounted snuggly in the throttle body. Spray a rag down pretty good with brake cleaner. If this is a first time effort, find a tuner in your area with marine experience. Sensors: Fitting: Threaded O2 . Well an update on the Sniper install. functioning controller during engine operation. It would cost considerably more but a second option that would have added performance benefits would be to switch to a dry manifld such as the headers available from Custom Marine, Inc.

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