But MAP sensors are very easy to physically implement and are inexpensive. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. This really applies to any O2 sensor regardless of EFI system. Part Number: 510-554-155. Certain ECU's allow for more or less tuning of this parameter. . The Sniper needs a "clean" 12V wire that is hot in Start and Run. 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. The first sniper I installed for my friend the 02 sensor went out within a week. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . Displayed so quickly you likely do not see this. 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. Wideband Oxygen Sensor Status Shows status of wideband oxygen sensors. 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. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. When buying the Holley Sniper EFI kit, you've got two basic options. Categories. I also capped off the regulated return line with a hose, clamps, and chamfering bit. In Stock. Two common causes of poor idle are: 1) improper O2 sensor placement; 2) trying to run close . Video. I installed a holley sniper kit. 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. My spare "Bosch O2 Sensor" came from eBay & was half the price of anywhere else I found. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. 89 YJ 4.2L 258, AX-15 5spd, NP231, dana 30 front, dana 35 rear with posi, gears unknown. 5. The throttle body has a built in fuel pressure regulator set at 58.5 psi. In the. Much of the system is encased right inside the throttle body—and that includes the ECU. This would be slightly after all the cylinders merge. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . In a horizontal or if pointed upwards it can collect exhaust condensation liquids upon start up. 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 no-hassle way to get the most performance out of your vehicle without the use of a laptop computer; all you need to do is hook it up and drive! . n DO NOT use old radio or ballast resistor wiring without verifying you have a full 12V in CRANK, ON, and RUN. Items 1 - 21 of 21 Items. 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. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. In one of the other posts someone said they used the Bosch 17025 LSU4.9 sensor. AFR (Oxygen Sensor) - Initially should show "Heating". One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . It encompasses 350, 500, and 625 cfm 2-bbls. Pay close attention to the instructions on O2 sensor placement. Who knows. The Sniper EFI Factory refurbish process starts by stripping a used or blemish Sniper EFI throttle body down to the bare casting. I did--- Save your money and piece a fuel it together. Locate a position for the oxygen sensor as close to the engine as possible. EFI is the wave of the future. Product Q&A . There are two ways to go here. I will get a new 02 sensor before I swap back to the orange box. EFI EFI kit electronic fuel injection. From there, our highly trained factory refurbish technicians flow the original fuel injectors. Parts List: 1) Holley Sniper 2300 EFI Kit (Do not buy the kit with fuel lines and pump etc. 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. 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. Will Holley keep the MSD Atomic now that they own MSD? May 19, 2021. I also installed the returnless Holley fuel pump that fits in the tank and hyperspark distributor and module. No . This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. Staff Writer. If you have long tube headers, mount the sensor approximately 6-10" after the collector. This is great information that can only get you closer to an ideal solution. . Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. Also the progressive link. I bet I won't get that lucky. As posted earlier you will need a fuel pump rated at delivering adequate pressure to the throttle body. Seems to LEARN much faster than the Fitech did. 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. It's there now . Followed all the instructions to the letter. 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. The truck started fine after install, and ran down the road ok. Flange Style. Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. Conditions when closed loop o2 should be turned off. Did a test startup on my new sniper by running the power wire to battery + and not using the o2 sensor. PRO's: Wideband O2 sensor harness is longer, allowing easier connection and routing. The target A/F value based on load or MAF cfm, and engine speed. Sniper EFI Quadrajet Marine. Jan 20, 2019. I am a competent mechanic and I have checked all the usual suspect items. If the indicator reads "LOW Err" double check the connection to the CTS. 4. 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. You can purchase the V6 EFI in tank fuel pump, but Holley will advise that the stock pump will not provide enough volume. Without the engine running, AFR will read 35.6 Sniper EFI 4500 Marine. 10 min read. Part# 534-199. quick fuel. When either of these operating temperature ranges is exceeded, the sensor can no longer be . Holley's self learning system is a blessing and a curse. In Stock. Part# 554-155. holley efi. You have to angle it to help the throttle cable get around the booster. 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 . If any injectors fail to meet our flow standards they are replaced with good injectors. Flange Style. Holley recommends a 3/8" fuel supply line. . Apr 13, 2017. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. The latest is the new Holley Sniper EFI — touted as a true bolt-on self-learning carb replacement. 29. Holley Sniper EFI Wideband Oxygen Sensor. $102.95. I have a 74 bronco, 302, mild cam. Ran about 5 seconds and died. Replaced O2 sensor but continued to have AFR issues running too rich. 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. Aftermarket headers are pretty much the only safe way to run an O2 sensor. #24. It should be pretty straight forward what each of these values do. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Car runs perfect . Sniper EFI 4bbl Marine. Holley EFI Oxygen Sensor. Note the temperature sensor mounted on the back of the driver side head in the above photo. Much smother throttle response off the bottom. Sniper EFI Releases new Stealth 4150 . I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. 3. This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. And had no issues after the new o2 sensor. Went with around .525 lift, 270 duration on a 114 LSA and the car was sucking vacuum like a new hoover. 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.. Now the lower cost Holley Sniper advertised for March 31 2016. 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. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. Put an end to cold start issues, hesitations, vapor . And the relay and fuse were mounted along the firewall. Jun 7, 2021. With a cold engine it should read similar to the MAT sensor. 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.). Being near the highest point of the header and not any reversion issues, the O2 will work just fine in these apps. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. LED PC Text Gauge Text Description None Disabld … Signifies that sensor channel is not enabled. Dec 28, 2016. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . ¬Turn the key to the run positon without starting . #1. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. All sensors are tested to ensure they accurately report critical engine data to the . Sniper EFI 2300 Marine. Vega$69. I happen to have a box of them here, as I use them on the dyno for tuning. I received my replacement TPS and O2 sensor. For now I have a genuine bosch O2 and Standard Automotive TPS installed. I recently installed the sniper setup on my stock 71 duster 340 4 speed. Purely coincidence about the '2300' number. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6″ before water blends with exhaust. Had to use the Holley SRK-4000 bracket to run throttle cable to the back of the Sniper. This minimizes installation time and packages really well on a diverse group of engine applications. #1. . Holley® Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the .