This is great information that can only get you closer to an ideal solution. Holley's self learning system is a blessing and a curse. Car runs perfect . If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. The Bosch LSU4.2 wide-band O2 sensor (shipped as part of the LM-1 kit) is rated to operate at an exhaust gas temperature of < 1300 degrees (F), and a sensor housing temperature of < 900 degrees (measured at the bung) for maximum accuracy and control. #24. PLENTY of wire to hook up ANY engine. Holley Sniper EFI Wideband Oxygen Sensor. Seems like the longer I wait the more options. Caballero Joe. The Sniper EFI master kit contains the most complete EFI fuel system on the market. 02/25/2020. . I am happy with Holleys no hassle replacement of the parts. All sensors are tested to ensure they accurately report critical engine data to the . QFI-500 Oxygen Sensor. Holley EFI Oxygen Sensor. And had no issues after the new o2 sensor. I bet I won't get that lucky. Categories. 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. 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. 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. As posted earlier you will need a fuel pump rated at delivering adequate pressure to the throttle body. Ran about 5 seconds and died. So the ecm adds fuel only making the situation worse. Sniper EFI 2300 Marine. Yellow Cold! Also the progressive link. Other? I think mercruiser does this on there mfi's 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. Now the lower cost Holley Sniper advertised for March 31 2016. From there, our highly trained factory refurbish technicians flow the original fuel injectors. This one came in with black clouds and 100% fuel Learn on the handheld barely running, with the WBO2 reading at 35:1 AFR. 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 It does not look like anything particularly superior in concept. Only show this user. 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. 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? The sensor Holley sniper requires is their brand or the Bosch. The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. Note the temperature sensor mounted on the back of the driver side head in the above photo. LED PC Text Gauge Text Description None Disabld Signifies that sensor channel is not enabled. One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . 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. 92 YJ 4.0, AX-15 5spd, np231, dana 30 front, dana 35 rear. Sniper EFI Releases new Stealth 4150 . One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . A straight-forward setup process is detailed in the full installation manual. B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. Sniper EFI Quadrajet Marine. 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. 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. Still needs a EFI pump and return line. If he wants to run in closed loop and have the system adapting to conditions at all times, the minute he fouls he is dead in the water. When it did keep running, the headers all started to smoke. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . with the extension. Apr 13, 2017. I happen to have a box of them here, as I use them on the dyno for tuning. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. . 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! Sniper EFI 4bbl Marine. I received my replacement TPS and O2 sensor. Vega$69. Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. 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 . It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. 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. The first sniper I installed for my friend the 02 sensor went out within a week. When buying the Holley Sniper EFI kit, you've got two basic options. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. . Items 1 - 21 of 21 Items. Replaced O2 sensor but continued to have AFR issues running too rich. Powering the Sniper, There are three wires that need to be connected to power on the Sniper, Red and Black main power wires, these need to be run directly to the battery and have a solid connection. Holley 2300 is their nomenclature for a 2-bbl generic fitment carburetor. Sniper EFI 4500 Marine. I had the car running before with the orange box and the Sniper combo. Sniper EFI Quadrajet Marine. Parts List: 1) Holley Sniper 2300 EFI Kit (Do not buy the kit with fuel lines and pump etc. Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Conditions when closed loop o2 should be turned off. Part# 554-155. holley efi. n DO NOT use old radio or ballast resistor wiring without verifying you have a full 12V in CRANK, ON, and RUN. Sniper EFI 4500 Marine. Wideband Oxygen Sensor Extension Cable. Yellow Init In First shown for an instant when the system is powered on. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. 5. Did a test startup on my new sniper by running the power wire to battery + and not using the o2 sensor. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. You have to be really meticulous when trouble shooting it. Is the advantages of the O2 sensor worth the $1000-$1200 price difference? AFR (Oxygen Sensor) - Initially should show "Heating". Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. EFI is the wave of the future. #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. 3. The first option is to just buy the injector body and the controller with the wiring harness and sensors. 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. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. Flange Style. Found out that it was due to rfi/emi. Holley recommends a 3/8" fuel supply line. Wideband Oxygen Sensor Status Shows status of wideband oxygen sensors. Staff Writer. Sniper EFI 2300 Marine. For now I have a genuine bosch O2 and Standard Automotive TPS installed. You have to angle it to help the throttle cable get around the booster. EFI EFI kit electronic fuel injection. May 1, 2018 They want you to angle it to keep it from fouling. Note the sensor is being heated and the condensation can thermally shock it. 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. Certain ECU's allow for more or less tuning of this parameter. 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. It works fine. Displayed so quickly you likely do not see this. No . Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. I did--- Save your money and piece a fuel it together. The throttle body has a built in fuel pressure regulator set at 58.5 psi. Initial Calibration in Basic Configuration. So I bought the progressive linkage but you then have . Turn the key to the run positon without starting . I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. Much of the system is encased right inside the throttle bodyand that includes the ECU. They are $80-$125 each. Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas. Location. Sniper EFI 4bbl Marine. In the. Yellow Heating HO Sensor is heating. The Sniper EFI Factory refurbish process starts by stripping a used or blemish Sniper EFI throttle body down to the bare casting. Holley sent him a new one for free. You should then have at least 18-24" of pipe after the sensor. . I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. Purely coincidence about the '2300' number. Sort. The truck started fine after install, and ran down the road ok. Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. This runs in the area of $1000 and has everything you need for a basic install on almost any vehicle equipped with a four barrel carb. I recommend popping for the Master . Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. Sent unit back to Holley. 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. Product Q&A . CTS (Coolant Temperature Sensor) - Reads engine temperature. Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. Pay close attention to the instructions on O2 sensor placement. Dec 5, 2021. . Look no further. Part Number: 510-554-155. . $102.95. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. $119.95. The fuel pump will run off a relay in the sniper harness (blue wire) pink wire gets switch/run power to the relay. Next, the new unit was installed onto the manifold. Followed all the instructions to the letter. 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. Will Holley keep the MSD Atomic now that they own MSD? Now that it's installed and working fine, I picked up . Good news is the car will run and drive without the O2 and TPS. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. With a bad TPS you will have to manually prime to try and get it . 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.). 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. This would be slightly after all the cylinders merge. Part# 534-199. quick fuel. 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. 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. 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. Install the throttle linkage to the Sniper EFI throttle body. 29. I left the stock temp sensor in the front of the passenger head. When either of these operating temperature ranges is exceeded, the sensor can no longer be . Video. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. The target A/F value based on load or MAF cfm, and engine speed. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. In one of the other posts someone said they used the Bosch 17025 LSU4.9 sensor. 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..