Holley® Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . Since the Sniper install, I encountered my second O2 sensor failure so I thought I would try the "Innovate Bung Extender" recommended by a few folks here. Holley recommends a 3/8" fuel supply line. #24. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. . May 19, 2021. With a cold engine it should read similar to the MAT sensor. Had to use the Holley SRK-4000 bracket to run throttle cable to the back of the Sniper. Is the advantages of the O2 sensor worth the $1000-$1200 price difference? And had no issues after the new o2 sensor. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Sniper EFI 4500 Marine. Much of the system is encased right inside the throttle body—and that includes the ECU. The in tank pump is quieter, will normally run cooler and should last longer. 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 received my replacement TPS and O2 sensor. Other? With a bad TPS you will have to manually prime to try and get it . Dec 5, 2021. No . PRO's: Wideband O2 sensor harness is longer, allowing easier connection and routing. One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . In Stock. Everything is included to completely plumb your fuel system including; 20 feet of 3/8" EFI Hose, in-line fuel pump, post and pre fuel filters, return bulkhead, and all of the necessary fittings and hardware. For now I have a genuine bosch O2 and Standard Automotive TPS installed. Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. This minimizes installation time and packages really well on a diverse group of engine applications. . I left the stock temp sensor in the front of the passenger head. Staff Writer. This really applies to any O2 sensor regardless of EFI system. Part# 554-155. holley efi. The truck started fine after install, and ran down the road ok. . Sniper EFI 2300 Marine. Will Holley keep the MSD Atomic now that they own MSD? This would be slightly after all the cylinders merge. Yellow Init… In First shown for an instant when the system is powered on. Items 1 - 21 of 21 Items. Use a return fuel line. n DO NOT use old radio or ballast resistor wiring without verifying you have a full 12V in CRANK, ON, and RUN. The Sniper needs a "clean" 12V wire that is hot in Start and Run. Yellow Heating HO Sensor is heating. Without the engine running, AFR will read 35.6 Wideband Oxygen Sensor Extension Cable. You have to angle it to help the throttle cable get around the booster. George Sniper EFI 4bbl Marine. It flows 850 cfm and can support up to 650 horsepower. 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. The Sniper EFI throttle-body drops in place of your . Part# 50-5009QFT. Car runs perfect . Jan 20, 2019. 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. 29. Did a test startup on my new sniper by running the power wire to battery + and not using the o2 sensor. Doesn't look like it will have an O2 sensor. Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. Part Number: 510-554-155. . When buying the Holley Sniper EFI kit, you've got two basic options. Part# 534-199. quick fuel. Flange Style. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. The fuel pump will run off a relay in the sniper harness (blue wire) pink wire gets switch/run power to the relay. $102.95. 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. The Sniper EFI master kit contains the most complete EFI fuel system on the market. Only show this user. . The latest is the new Holley Sniper EFI — touted as a true bolt-on self-learning carb replacement. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. In Stock. Now the lower cost Holley Sniper advertised for March 31 2016. I bet I won't get that lucky. I recently installed the sniper setup on my stock 71 duster 340 4 speed. This is great information that can only get you closer to an ideal solution. Being near the highest point of the header and not any reversion issues, the O2 will work just fine in these apps. Note the temperature sensor mounted on the back of the driver side head in the above photo. When it did keep running, the headers all started to smoke. Now that it's installed and working fine, I picked up . B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. 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. Location. The sensor Holley sniper requires is their brand or the Bosch. Sniper EFI 4bbl Marine. It will not fit on round or oval risers without a suitable flat area. It works fine. Certain ECU's allow for more or less tuning of this parameter. It should be pretty straight forward what each of these values do. You can purchase the V6 EFI in tank fuel pump, but Holley will advise that the stock pump will not provide enough volume. 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.). My spare "Bosch O2 Sensor" came from eBay & was half the price of anywhere else I found. Look no further. If you have long tube headers, mount the sensor approximately 6-10" after the collector. Much smother throttle response off the bottom. The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. 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. Followed all the instructions to the letter. Sent unit back to Holley. The first option is to just buy the injector body and the controller with the wiring harness and sensors. Sniper EFI 2300 Marine. Parts List: 1) Holley Sniper 2300 EFI Kit (Do not buy the kit with fuel lines and pump etc. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. The throttle body has a built in fuel pressure regulator set at 58.5 psi. In one of the other posts someone said they used the Bosch 17025 LSU4.9 sensor. Quote Reply Topic: Holley Sniper Posted: Jan/05/2022 at 2:01pm . Holley's self learning system is a blessing and a curse. . I also capped off the regulated return line with a hose, clamps, and chamfering bit. EFI is the wave of the future. 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. Categories. But MAP sensors are very easy to physically implement and are inexpensive. 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. Still needs a EFI pump and return line. holley sniper unit = 999.95 intake gasket set good gaskets felpro = 40 bucks msd ready to run dist NOT for sniper control = 350.00 coil for ignition msd blaster 2 & bracket mount = 55.00 new coolant temp sensor for there known defective item they sell you = 20.00 make my own throttle arm spacer 1 hr or buy one and wit 3-5 days @ = 20.00 02 sensors are very heat sensitive, and can detect an exhaust pulsation in a single Header tube, that's why we always wanted to position the sensor into at least 2 opposite firing tubes we running Headers. There are two ways to go here. 4. 89 YJ 4.2L 258, AX-15 5spd, NP231, dana 30 front, dana 35 rear with posi, gears unknown. 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. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. As posted earlier you will need a fuel pump rated at delivering adequate pressure to the throttle body. Found out that it was due to rfi/emi. Pink switched power wire, this needs to be connected to a point that is 12V in run and while cranking. Sniper EFI Releases new Stealth 4150 . 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 Much of the system is encased right inside the throttle body—and that includes the ECU. This is made by Innovate, the guy that runs the Holley EFI forum HIGHLY recomends AND uses them himself, I use them, my o2 on my wideband Innovate, kept going bad, a 4.2 Bosch o2, put this on both my Holley HP NTK sensor & the wide band, been 2 years now & lots of driving, all good, Heat-Sink Bung Extender (HBX-1) - P/N: 37290 Conditions when closed loop o2 should be turned off. Securely install the Oxygen sensor and route the wires to keep away from the exhaust and pinch points to connect the O2 sensor connector from the EFI. Sort. Displayed so quickly you likely do not see this. I also installed the returnless Holley fuel pump that fits in the tank and hyperspark distributor and module. Ran about 5 seconds and died. The Sniper EFI Factory refurbish process starts by stripping a used or blemish Sniper EFI throttle body down to the bare casting. Seems to LEARN much faster than the Fitech did. It encompasses 350, 500, and 625 cfm 2-bbls. 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. 3. QFI-500 Oxygen Sensor. #26. cglax6 said: Unfortunately, if a sender/sensor goes bad that gives the Sniper information, you're going to have worse issues than just a fan not turning on when you want it to. I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop.
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