Holley Sniper Coolant Temp Sensor Problems02-26-2017, 05:07 PM. Depinning the harness - correct, just the downstream connector so that the wiring from the Sniper still goes to the first connector but that the connector that mates to it no longer has a wire for the unused signal. White smoke coming from the exhaust may indicate a bad problem like blown a head gasket or a crack in the block or head. I'm just running the Sniper without ignition timing controls. I planned on starting my car for the first time after the swap tomorrow, but the temp sensor with the 1/2" NPT to 3/8" NPT bushing I needed to adapt it to the hole in the Weiand X-CELerator manifold is too tall and is blocking the upper radiator hose. Install the Coolant Temperature Sensor into a 3/8” NPT coolant passage in either the intake manifold or cylinder head. 99 Available Options Select Brand - + Add to Cart. I have the factory temp gauge (which reads 40* too low) an aftermarket one which is accurate and the Holley Sniper requires one for it's computer management so I am looking for a convenient third location. At high elevations it could read as low as 75kPa. It is best to drain some of the coolant before the sensor is installed. 95 Part# 556-151 Add To Cart Overview Coolant Temperature Sensor for Sniper EFI Systems Features: Comes with pre-applied thread sealant for a leak. The first option is to just buy the injector body and the controller with the wiring harness and sensors. Aug 14, 2022 #1 My Holley Sniper kit has been sitting in the box now for 2 months waiting for the pole barn to get finished…getting close to starting this upgrade so I am mentally reviewing the steps for the install (1975 2F). CTS (Coolant Temperature Sensor) – Reads engine temperature. Holley coolant temperature sensors are designed to work with Holley's Pro-Jection fuel injection systems. The coolant temperature sensor directly communicates the heat in the engine to the ECU. I have a new Holley Sniper FI unit going on my car soon, and it uses its own temp sensor going into the water pump. Have to see if one is compatible. Getting it in the head on the passenger side is a PITA with the AC suitcase and headers. Check the timing and adjust if. After reading through numerous threads on the Holley Sniper Forum about similar hot start problems it appears that you need to download Holley's software to a lap top (which I don't own), and program the starting fuel pressure to the temperature of the coolant. I've never seen the shop I had install my Sniper hook up a lap top to the car. Holley Sniper Coolant Temp Sensor Comparison - Holley Sensor vs. 95 Part# 556-151 Add To Cart Overview Coolant Temperature Sensor for. The first option is to just buy the injector body and the controller with the wiring harness and sensors. With a cold engine it should read similar to the MAT sensor. It comes with its own temp sensor. Make sure the fuel pressure is correct. All you are going to need is thermometer and voltmeter to test the temperature sensor. Next, check the fuel filter to see if it needs to be replaced. Holley Sniper EFI offers the following instructions for fixing backfires: Check for intake leaks and make sure all connections are tight. Depinning the harness - correct, just the downstream connector so that the wiring from the Sniper still goes to the first connector but that the connector that mates to it no longer has a wire for the unused signal. These are globally used for all sensors that have Caution or Warning outputs configured. It has a 180° thermostat and the Auto Meter Gauge reads 185°F. Aug 14, 2022 #1 My Holley Sniper kit has been sitting in the box now for 2 months waiting for the pole barn to get finishedgetting close to starting this upgrade so I am mentally reviewing the steps for the install (1975 2F). To find out you'll have to observe what is physically happening. 5K views 1 year ago Today on Tech Tuesday we're going to cover the importance of coolant temperature sensor installation. They are available for both digital and analog systems and feature a Weatherpack connection that will easily. The Holley Sniper EFI kit comes with a modern style coolant temperature sensor, which threads into the Weiand intake manifold with a small amount of sealant on the threads. You probably have a mechanical failure since that doesn't sound like a Sniper problem. Holley Sniper EFI offers the following instructions for fixing backfires: Check for intake leaks and make sure all connections are tight. The IAC parked position at 88 degrees is approximately 80% (plunger is pulled 80% of the way out of the IAC passage. If you think your throttle position sensor is failing, working some of the time and other times it is registering negative percent, my first suspicion: RF Interference. The Holley Sniper EFI kit comes with a modern style coolant temperature sensor, which threads into the Weiand intake manifold with a small amount of sealant on the threads. MAT (Manifold Air Temperature Sensor) – Should read ambient on a cold engine with the key on and the engine not running. The Sniper sensor must be installed in the manifold. 95 Part# 556-151 Add To Cart Overview Coolant Temperature Sensor for Sniper EFI Systems Features: Comes with pre-applied thread sealant for a leak free installation Operating Range: -40°C to 135°C About Holley EFI Holley is the new standard in EFI!. Danny Cabral Administrator Join Date: Dec 2009 Posts: 32929 Tweet #5 04-25-2023, 03:47 PM. Clean or replace the Mass Air Flow sensor; Check for exhaust leaks. The shop has a heater set at 50°F-55°F temp to keep moisture out and tools halfway warm until I fire off the wood stove. 37 Ohm on 20K scale TBI used #1 = 3. I relocated my factory sensor to the thermostat housing freeing up the original manifold port for the Sniper. If you suspect that your Holley Sniper EFI is having fuel delivery issues, there are a few things you can check. The coolant temperature sensor itself is often quite cheap, and you can often find them for around $40 for a quality one. Coolant Temp Sensor Help. First, make sure that the fuel pump is turned on and working properly. CTS (Coolant Temperature Sensor) – Reads engine temperature. They are available for both digital and analog systems and feature a Weatherpack connection that will easily plug into your Pro-Jection wiring harness. Install the Coolant Temperature Sensor into a 3/8” NPT coolant passage in either the intake manifold or cylinder head. I have the factory temp gauge (which reads 40* too low) an aftermarket one which is accurate and the Holley Sniper requires one for it's computer management so I am looking for a convenient third location. Your instrument cluster gauge will remain low until the thermostat opens, at which time you can watch it climb. 83K subscribers Subscribe 44 Share Save 4. ) Go to the handle (little square box) for the temperature immediately to the left of the current CTS reading and move it all the way down to zero. Specs of testing: Truck outside over night high 20°F - low 30°F snow on vehicle and not started for 12hr before and during this test. The issue started on the very first test drive. Thinking out loud here, I figured there must be a coolant temp sensor that has 3 or 4 wire set up. CTS Sensor: Standard Motor Products TX3 TPS Sensor: Standard Motor Products TH191 IAC Motor: Standard Motor Products AC416 WBO2 Sensor: Bosch 17025, 0258017025 (LINK/LINK/LINK) (The Sniper EFI 2 bar MAP sensor is internal with the ECU. It would seem to hesitate and cut out for a split second. CTS (Coolant Temperature Sensor) - Reads engine temperature. 6K views 1 year ago DISCLAIMER: These. Coolant Temperature Sensor for Holley EFI and commander 950 systems About Holley EFI Holley is the new standard in EFI! Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever! Specs. The factory included CTS from Holley is way off base from actual temp. Question - the water temp sensor for the Sniper, you used the Holley supplied sensor and put it on the manifold? Steve. Applications Questions & Answers Ask a Product Question Ask a Question. Finally, inspect the fuel lines for leaks or blockages. The most common symptoms of a bad coolant temperature sensor include poor mileage, cooling fans not coming on, engine performance issues, an overheating engine, and a check engine light on your dashboard. If you suspect that your Holley Sniper EFI is having fuel delivery issues, there are a few things you can check. All you are going to need is thermometer and voltmeter to test the temperature sensor. With a cold engine it should read similar to the MAT sensor. 12-30-2018, 12:20 PM The factory included CTS from Holley is way off base from actual temp. Coolant temp sensor problems, way off range, 3 sensors tested. In our example, above, the coolant temperature sensor finds the engine at 88 degrees. In our example, above, the coolant temperature sensor finds the engine at 88 degrees. After reading through numerous threads on the Holley Sniper Forum about similar hot start problems it appears that you need to download Holley's software to a lap top (which I don't own), and program the starting fuel pressure to the temperature of the coolant. Coolant temp sensor problems, way off range, 3 sensors tested. Holley Sniper Coolant Temp Sensor Comparison - Holley Sensor vs. Holley Sniper EFI offers the following instructions for fixing backfires: Check for intake leaks and make sure all connections are tight. This is useful for a plethora of tuning reasons, such as cold start where the ECU can detect that the engine is cold and utilize specific maps to help it start easily, warm up quickly, and even be instantly driveable. Warning and Caution Indicator Indicates status of the "Caution" and "Warning" parameters. It fired right up on a rebuilt Ford 302 engine, but I'm having some issues with the coolant temp sensor. This would be the solution here, Thoughts? Never seen a 3-wire temps sensor. The Sniper sensor must be installed in the manifold. My guess is that the IAC is sticking closed, but you'll need to actually go look at it to find out. Coolant temp sensor problems, way off range, 3 sensors tested. Use thread sealer or a small amount of thread tape. MAT (Manifold Air Temperature Sensor) – Should read ambient on a cold engine with the key on and the engine not running. Specs of testing: Truck outside over night high 20°F - low 30°F snow on vehicle and not started for 12hr before and during this test. It's not a good idea to just plug heater lines because that coolant still needs to move. This video shows what I mean on the display. I would drill a small hole in the thermostat and orient it so it's pointed at the sensor. Coolant temp sensor problems, way off range, 3 sensors tested. Can I just install one sensor and tap the wires for the gauges and FI unit or should I install both sensors and run wiring separately?. The average coolant temperature sensor replacement cost is between $50 and $250, depending on the car model and labor costs. 46 Ohm on 20K scale TBI used #2 = 3. Warning and Caution Indicator Indicates status of the “Caution” and “Warning” parameters. 1K views 1 year ago Holley's Sniper EFI kit for the Autolite 1100 is awesome, and we can't wait to get it installed! However, this is a new kit from Holley, and it was originally. It's not a good idea to just plug heater lines because that coolant still needs to move. So I know the 52°F temp would be correct and can be verified with the Raytek IR temp gun also. Do not overtighten or damage to the cylinder head or intake may occur. I have a mechanical gauge about six inches from the TX3 and at operating temperature the TX3 is 8°-12°F lower than the mechanical gauge. Here is a more detailed list of the signs of a bad or failing coolant temperature sensor to look for: 1. Standard Products TX3 mechtrician1 2. Basically before it got to this point, it was climbing to 160° no issues, then at about 164° it went to LOW ERR, then kept. I am also installing the Dakota Digital gauge cluster as well. I have a new Holley Sniper FI unit going on my car soon, and it uses its own temp sensor going into the water pump. MAT (Manifold Air Temperature Sensor) - Should read ambient on a cold engine with the key on and the engine not running. You probably have a mechanical failure since that doesn't sound like a Sniper problem. The pass side port is needed for the heater hose. See more Reply Save Like JD08 · #10 · Mar 31, 2017 1. If you cannot identify the problem yourself. CTS Sensor: Standard Motor Products TX3 TPS Sensor: Standard Motor Products TH191 IAC Motor: Standard Motor Products AC416 WBO2 Sensor: Bosch 17025, 0258017025 (LINK/LINK/LINK) (The Sniper EFI 2 bar MAP sensor is internal with the ECU. You probably have a mechanical failure since that doesn't sound like a Sniper problem. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Coolant Temperature Sensor 543-120 | Ships Free at EFISystemPro. Holley Sniper EFI Sniper EFI HyperSpark CD Ignition Box $315. The only correlation I can see in the data log is that at or around 180*F coolant temp, the timing shoots to 46*, the injector pulse width shoots up, and the engine stalls. These are globally used for all sensors that have Caution or Warning outputs configured. 1K views 1 year ago Holley's Sniper EFI kit for the Autolite 1100 is awesome, and we can't wait to get it installed! However, this is a new kit from Holley, and it was originally designed. If you cannot identify the problem yourself. I'm just running the Sniper without ignition timing controls. Com | Sniper TBI Home Coolant Temperature Sensor, Sniper TBI -10% Click Image for Gallery Coolant Temperature Sensor, Sniper TBI Views: 19102 Brand: Standard Brand Product Code: TX3 | 543-120 $22. 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. You just need to tune around it a little by lowering the temp that temperature enrichment ends, so it'll start Learning and fan-on temps if you are using that functionality. The coolant temperature sensor directly communicates the heat in the engine to the ECU. Use the DVCV port if available. It is best to drain some of the coolant before the sensor is installed. The most common symptoms of a bad coolant temperature sensor include poor mileage, cooling fans not coming on, engine performance issues, an overheating engine, and a check engine light on your dashboard. Coolant Temperature Sensor for Holley EFI and commander 950 systems About Holley EFI Holley is the new standard in EFI! Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever! Specs. The coolant temperature sensor will show different om reading at different temperatures. Some of the key reasons to have the temp sensor in the correct. The Sniper EFI IAT sensor is a circuit board sensor that measures one throttle bore. 1K views 1 year ago Holley's Sniper EFI kit for the Autolite 1100 is awesome, and we can't wait to get it installed! However, this is a new kit from Holley, and it was originally designed. The Sniper sensor must be installed in the manifold. Also, when it just flat out refuses to restart, the AFR goes super lean like the injectors are not spraying any fuel even though there is fuel pressure. At high elevations it could read as low as 75kPa. MAT (Manifold Air Temperature Sensor) – Should read ambient on a cold engine with the key on and the. Install the Coolant Temperature Sensor into a 3/8” NPT coolant passage in either the intake manifold or cylinder head. I noticed the coolant temp reading was fluctuating between 164°-155°F. 1K views 1 year ago Holley's Sniper EFI kit for the Autolite 1100 is awesome, and we can't wait to get it installed! However, this is a new kit from Holley,. Specs of testing: Truck outside over night high 20°F - low 30°F snow on vehicle and not started for 12hr before and during this test. I have a mechanical gauge about six inches from the TX3 and at operating temperature the TX3 is 8°-12°F lower than the mechanical gauge. You just need to tune around it a little by lowering the temp that temperature enrichment ends, so it'll start Learning and fan-on temps if you are using that functionality. I think there is a set temp where it goes closed loop and as long as it gets above that temp I don't see a problem (that's my thought process,) it will just take a little longer in the housing. Came across a common 2-3 wire change for LS swaps on older cars to run a gauge off the third wire. Check the timing and adjust if necessary. I will be testing the CTS sensor Ohms here shortly and report back. 95 Part# 556-151 Add To Cart Overview Coolant Temperature Sensor for Sniper EFI Systems Features: Comes with pre-applied thread sealant for a leak free installation Operating Range: -40°C to 135°C About Holley EFI Holley is the new standard in EFI!. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Question - the water temp sensor for the Sniper, you used the Holley supplied sensor and put it on the manifold? Steve. Holley Technical Support 1801 Russellville Road Bowling Green, KY 42101 Phone: 270-781-9741 www. Thinking out loud here, I figured there must be a coolant temp sensor that has 3 or 4 wire set up. Ohms readings on 20K Ohm scale on digital Fluke meter and all three sensors in the shop and up to shop temp of 70°F tested on the tip of all three to verify the same temp with the IR temp gun. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. I relocated my factory sensor to the thermostat housing freeing up the original manifold port for the Sniper. Warning and Caution Indicator Indicates status of the “Caution” and “Warning” parameters. Holley Sniper EFI Sniper EFI HyperSpark CD Ignition Box $315. I recommend popping for the Master Kit, though. You just need to tune around it a little by lowering the temp that temperature enrichment ends, so it'll start Learning and fan-on temps if you are using that functionality. A coolant temperature sensor costs $30 to $100, and the labor costs $20 to $150. Holley coolant temperature sensors are designed to work with Holley's Pro-Jection fuel injection systems. It fired right up on a rebuilt Ford 302 engine, but I'm having some issues with the coolant temp sensor. Holley Sniper EFI Sniper EFI HyperSpark CD Ignition Box $315.