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. Followed all the instructions to the letter. 29. Seems to LEARN much faster than the Fitech did. I will get a new 02 sensor before I swap back to the orange box. Still needs a EFI pump and return line. The target A/F value based on load or MAF cfm, and engine speed. I installed a holley sniper kit. Sort. In the. I do agree if he can get it tuned prior to fouling he can lock that tune and run in open loop. If the indicator reads "LOW Err" double check the connection to the CTS. I have searched thru the forum as much as I can, with not much luck. Without the engine running, AFR will read 35.6 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. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. The fuel pump will run off a relay in the sniper harness (blue wire) pink wire gets switch/run power to the relay. This is great information that can only get you closer to an ideal solution. A straight-forward setup process is detailed in the full installation manual. Car runs perfect . One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . Dec 28, 2016. Featured Products EFI - Fuel Injection $3.86 - $1115.95 1970 Products Sensors $3.92 - $441.95 I think mercruiser does this on there mfi's 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. 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 I bet I won't get that lucky. Being near the highest point of the header and not any reversion issues, the O2 will work just fine in these apps. It works fine. Turn the key to the run positon without starting . Held finger over IAC and it ran better, the thing was just wide open all the time and had nothing to suck. PLENTY of wire to hook up ANY engine. When buying the Holley Sniper EFI kit, you've got two basic options. Wideband Oxygen Sensor Extension Cable. With a bad TPS you will have to manually prime to try and get it . PRO's: Wideband O2 sensor harness is longer, allowing easier connection and routing. Sniper EFI 4bbl Marine. Jan 20, 2019. Miami, FL. Much of the system is encased right inside the throttle bodyand that includes the ECU. Next, the new unit was installed onto the manifold. Did a test startup on my new sniper by running the power wire to battery + and not using the o2 sensor. 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. LED PC Text Gauge Text Description None Disabld Signifies that sensor channel is not enabled. Other? I took my time soldered every wire connection and routed all the wires carefully to avoid any emt issues. I did--- Save your money and piece a fuel it together. Part# 554-155. holley efi. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. Location. Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. Oxygen Sensor is sold separately.Adaptor should be installed in a flat area of riser at least 6 before water blends with exhaust. Ran about 5 seconds and died. If you have any exhaust leaks between the combustion chamber and 18-24" after the sensor you are going to have problems. The latest is the new Holley Sniper EFI touted as a true bolt-on self-learning carb replacement. $119.95. I had an o2 sensor fail on a pass yesterday, and flatline at 11.5afr. I also installed the returnless Holley fuel pump that fits in the tank and hyperspark distributor and module. The Sniper EFI Factory refurbish process starts by stripping a used or blemish Sniper EFI throttle body down to the bare casting. There are two ways to go here. . 4. The basic kit comes with the TBI unit, touchscreen controller, water temperature sensor, a wideband oxygen sensor, and all the necessary wiring. with the extension. 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. n DO NOT use old radio or ballast resistor wiring without verifying you have a full 12V in CRANK, ON, and RUN. Part Number: 510-554-155. Conditions when closed loop o2 should be turned off. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle . Sniper EFI Quadrajet Marine. The Ford 2300 engine uses a Holley carburetor, but it is in fact a licensed copy of a 32/36 Weber. I recently installed the sniper setup on my stock 71 duster 340 4 speed. 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! Pay close attention to the instructions on O2 sensor placement. Flange Style. 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. You can purchase the V6 EFI in tank fuel pump, but Holley will advise that the stock pump will not provide enough volume. It should be pretty straight forward what each of these values do. I am a competent mechanic and I have checked all the usual suspect items. Found out that it was due to rfi/emi. One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . Seems like the longer I wait the more options. I recommend popping for the Master . 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 . Yellow Cold! It's there now . Went with around .525 lift, 270 duration on a 114 LSA and the car was sucking vacuum like a new hoover. 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 sensor Holley sniper requires is their brand or the Bosch. AFR was 19 area. . Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. With a cold engine it should read similar to the MAT sensor. 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. It will not fit on round or oval risers without a suitable flat area. 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. Wideband Oxygen Sensor Status Shows status of wideband oxygen sensors. 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. May 1, 2018 They want you to angle it to keep it from fouling. Use a return fuel line. Holley EFI Oxygen Sensor. It flows 850 cfm and can support up to 650 horsepower. And the relay and fuse were mounted along the firewall. Doesn't look like it will have an O2 sensor. This one came in with black clouds and 100% fuel Learn on the handheld barely running, with the WBO2 reading at 35:1 AFR. Now the lower cost Holley Sniper advertised for March 31 2016. Much of the system is encased right inside the throttle bodyand that includes the ECU. This step is only for those installing their Super Sniper EFI on top of a draw-through or Roots-style blower. No . Will Holley keep the MSD Atomic now that they own MSD? Dec 5, 2021. $102.95. Holley 2300 is their nomenclature for a 2-bbl generic fitment carburetor. Sniper throttle body linkage opens all four barrels evenly when you depress the throttle. EFI EFI kit electronic fuel injection. Note the sensor is being heated and the condensation can thermally shock it. . Pink switched power wire, this needs to be connected to a point that is 12V in run and while cranking. When we got word that Muscle Car Restorations in Chippewa Falls, Wisconsin, was about to bolt . . But MAP sensors are very easy to physically implement and are inexpensive. 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. Good news is the car will run and drive without the O2 and TPS. You have to be really meticulous when trouble shooting it. In Stock. Sniper EFI Installation Guide. After discussing it in this thread and talking with Holley's tech support, I decided . My spare "Bosch O2 Sensor" came from eBay & was half the price of anywhere else I found. . Air-Fuel Ratio (AFR) - The most common reference term used for mixtures in internal combustion engines. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. Sniper EFI 4bbl Marine. From there, our highly trained factory refurbish technicians flow the original fuel injectors. 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.). Holley has a pump almost identical in size to the OEM pump and it's not difficult to change. Put an end to cold start issues, hesitations, vapor . 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. Who knows. 3. 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. Aftermarket headers are pretty much the only safe way to run an O2 sensor. . Oxygen (O2) Sensor - Is an electronic device that measures the proportion of oxygen (O2) in the exhaust gas. Initial Calibration in Basic Configuration. Staff Writer. Vega$69. 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. You have to angle it to help the throttle cable get around the booster. Look no further. Sniper EFI 4500 Marine. The first option is to just buy the injector body and the controller with the wiring harness and sensors. 5. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. 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. Also, with Headers you loose 600 to 700 degrees between Head and bottom collector, you don't want to read that loss. This completes the basic installation of the Holley Sniper EFI 4150 Super Sniper 1250/650 kit. 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. #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 also capped off the regulated return line with a hose, clamps, and chamfering bit. I am happy with Holleys no hassle replacement of the parts. 92 YJ 4.0, AX-15 5spd, np231, dana 30 front, dana 35 rear. The Sniper needs a "clean" 12V wire that is hot in Start and Run. Quote Reply Topic: Holley Sniper Posted: Jan/05/2022 at 2:01pm . AFR (Oxygen Sensor) - Initially should show "Heating". RPM going up and down , miss firing and backfiring. #3. Only show this user. Apr 13, 2017. Certain ECU's allow for more or less tuning of this parameter. Sort. 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.. Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. 10 min read. In Stock. 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. George . Holley recommends a 3/8" fuel supply line. 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. 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 . Now that it's installed and working fine, I picked up . 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. Jun 7, 2021. 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. And had no issues after the new o2 sensor. Video. Holley Sniper EFI Wideband Oxygen Sensor. This minimizes installation time and packages really well on a diverse group of engine applications. Sent unit back to Holley. Sniper EFI 2300 Marine. This really applies to any O2 sensor regardless of EFI system. It does not look like anything particularly superior in concept. Displayed so quickly you likely do not see this. Is the advantages of the O2 sensor worth the $1000-$1200 price difference? CTS (Coolant Temperature Sensor) - Reads engine temperature. Top 10 Holley Sniper EFI Tech Tips Holley Technical Training Manager Tom Kise's top ten "suggestions" for Holley Sniper EFI System installation issues. QFI-500 Oxygen Sensor. This is great information that can only get you closer to an ideal solution. Categories. Replaced O2 sensor but continued to have AFR issues running too rich. Caballero Joe. The right side o2 was obviously reporting a fat 10.3 afr as a result, but the car still went 139mph, LOL. Brass adaptor designed to install heated oxygen sensor in water-cooled marine exhaust risers. I have a 74 bronco, 302, mild cam. The engine RPM when closed loop o2 will begin. Purely coincidence about the '2300' number. So I bought the progressive linkage but you then have . In a horizontal or if pointed upwards it can collect exhaust condensation liquids upon start up. (Image/Wayne Scraba) The throttle body is a bolt-on replacement for a carburetor. Categories. The Sniper EFI throttle-body drops in place of your . Part# 534-199. quick fuel. 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. It is the ratio between the mass of air and the mass of fuel in the air-fuel mix at any given moment. 02/25/2020. If you have long tube headers, mount the sensor approximately 6-10" after the collector. Flange Style. The gasket under the old carb had a little matterial missong between the large holes, so I used a little gasket maker to seal it up a bit. #1. 3. The sniper will run fine without timing control with your existing HEI and in fact Holley recommends getting the sniper up and running on your existing setup before you switch to timing control to eliminate problems. As posted earlier you will need a fuel pump rated at delivering adequate pressure to the throttle body. The sniper fit perfectly on the intake. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. I happen to have a box of them here, as I use them on the dyno for tuning. Much smother throttle response off the bottom. Holley sent him a new one for free. 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. This would be slightly after all the cylinders merge. #1. Install the throttle linkage to the Sniper EFI throttle body. $125.95. Two common causes of poor idle are: 1) improper O2 sensor placement; 2) trying to run close . B/c what it sometimes perceives as a lean spike is actually raw fuel with no oxygen. If any injectors fail to meet our flow standards they are replaced with good injectors. 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. Had to use the Holley SRK-4000 bracket to run throttle cable to the back of the Sniper. Comes VERY complete.throttle cable bracket, kickdown bracket, base plate studs & nuts, heat shrink type connectors, and pretty decent instructions as well. Yellow Init In First shown for an instant when the system is powered on. You should then have at least 18-24" of pipe after the sensor. Holley's self learning system is a blessing and a curse. Parts List: 1) Holley Sniper 2300 EFI Kit (Do not buy the kit with fuel lines and pump etc. I bought a new holley sniper , dual sync dist., coil, and holley in tank fuel pump, When engine got hot it would go crazy. 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. The truck started fine after install, and ran down the road ok. I know from some of the other posts, there have been WBO2 sensor issues. My Lightnings have a bung welded through the water and into the dry exhaust area at the collector. All sensors are tested to ensure they accurately report critical engine data to the . I had the car running before with the orange box and the Sniper combo. I received my replacement TPS and O2 sensor. They are $80-$125 each. 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. EFI is the wave of the future. 89 YJ 4.2L 258, AX-15 5spd, NP231, dana 30 front, dana 35 rear with posi, gears unknown. . 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. When either of these operating temperature ranges is exceeded, the sensor can no longer be . 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. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to . In one of the other posts someone said they used the Bosch 17025 LSU4.9 sensor. Also the progressive link. May 19, 2021. the engine not running. It encompasses 350, 500, and 625 cfm 2-bbls. Yellow Heating HO Sensor is heating. Sniper EFI 4500 Marine. Locate a position for the oxygen sensor as close to the engine as possible. It flows 850 cfm and can support up to 650 horsepower. The wiring was a bit of a mess. The Sniper EFI could very well be one of the easiest to set-up fuel injections systems ever. 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 Part# 50-5009QFT. Sniper EFI Quadrajet Marine. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. Holley Sniper Installation Supplement Please note, a Holley Sniper instruction manual, as well as some small parts that come with the . #24. 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? Sniper EFI 2300 Marine. The first sniper I installed for my friend the 02 sensor went out within a week. I will keep the replacements as spares. The oxygen sensor should be mounted at a point where it can read a good average of all the cylinders on one bank. For now I have a genuine bosch O2 and Standard Automotive TPS installed. Sniper EFI Releases new Stealth 4150 . The throttle body has a built in fuel pressure regulator set at 58.5 psi. So the ecm adds fuel only making the situation worse. . Product Q&A . The Holley Super Sniper High Performance EFI kit comes with a coolant temperature sensor and an O2 sensor, both of which must be used for the EFI to work properly. 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 I left the stock temp sensor in the front of the passenger head. Items 1 - 21 of 21 Items. Items 1 - 21 of 21 Items. The in tank pump is quieter, will normally run cooler and should last longer. The Sniper EFI master kit contains the most complete EFI fuel system on the market.