If you are 100% sure the spark is weak, the next step would be to volt drop the live to the coil pack (with engine cranking or running) if ok, check the ECU earths and lives.
Blackened plugs could be the engine running rich, if it is a Renault, the coolant sensors can fail and show a minus temperature all the time this may not show as a fault code, if temperature is within possible engine temperatures, this when you need a code reader with live data, this would read -28°c for example.
The check engine light has not come on at any stage during the problem and investigation. Checked the dash warning light symbols by pressing the left stalk button and switching on, they all illuminated. Got a new coil pack and plugs, no improvement. Removed new plugs after 3 starts, totally blackened all plugs, checked spark strength, very weak. As the coil and plugs are good, I checked the crank position sensor as per ask the mechanic video, 225 ohms, where should I look next?
Have a Clio 2 2003 1.2 16 valve dynamique. Problems started with 50% reduced power, max rpm 3500. Suspected air leak or fuel pressure .I have removed manifold and checked all pipes, no leak. Checked fuel tank filter, clear and good fuel pressure. Engine hardly starts now, only runs badly for a minute and stops. Checked the system for faults with expensive Snap-On computer, just showed that I had unplugged various items so cleared these. more to follow
hi, i'm testing a Ford F-150 crankshaft sensor, for this one what should be the resistance and voltage values? i'm suspecting of the crankshaft sensor because the plugs doesn't have spark and coils are ok. thanks
Yes if it is a two wire (may have third earth shield) inductive type sensor, some very late cars may have three wire hall type sensor, which case follow my cam sensor video.
If you have access to code reader that can do live data just check for rpm when cranking.
i hve a k20a ep3 type r honda, p0341 code was found after engine rebuilt , and i had already bought a new cam sensor replace it but engine light still goes on, what would that be ? engine code still the same.
Has the engine still got the same camshaft? If it has been changed, does the sensor match the camshaft? Or is the reluctor wheel damaged. Maybe there is more than one sensor available. Also check wiring and connector for damage.
Honda’s have a built in diagnostics, they have a 2 pin (not 3 pin) data link under the glove box, if you bridge this, it will then flash the MIL lamp (the codes are on the internet), this would help diagnose the crankshaft sensor etc.
To test the fuel pump, when the car is working ok, turn the ignition on you should hear the fuel pump prime, do the same when it cuts out, if you can’t hear it there is a problem with the pump, relay or wiring.
I have a '96 Acura TL 2.5 that cold starts fine, but if I drive it for a short distance, park it, turn it off, and then try to restart it will turn-over, but it will not start until I allow it to sit for 20-30 minutes. Had a mechanic check it & he told me that it could be the Ignition Control Module, Crankshaft Position Module, Camshaft Position Module, or fuel pump. I don't have $ for all of test all of these possibilities so I'm hoping that you can help me pinpoint the problem. Please help!
The resistance for XJ6 should be 400-1200 ohms so you are ok there and it is producing voltage on cranking but this maybe slightly low for this model I have a spec of 2 volts minimum listed. I am assuming you have now spark or injector click, if you have it can’t be the crank shaft sensor .
Hi, i did those test on a Jaguar 90 xj6 and the result were .667 ohms with the key on and 1.120 vac trying to strating it.
Does this mean that my problem is definitely the crank sensor? because the part its a lil expensive for me and I would like sure before i buy it. Thanks in advance!!!
Hi, it is unlikely to be the crankshaft sensor, sounds more like incorrect fuel mixture, this could be an air leak, or possibly a problem with the Warm Up Regulator, this may not be getting any voltage, as you say it is idling high, and the Auxiliary Air Valve is also connected to the same live and earth and would stay open if it also has no voltage.
1988 VW Cabriolet (1.8L CIS K-Jetronick) idles pretty high, 1500 RMP however when the gas pedal is pressed to the floor, the RPM won't go over 2900... when going uphill, the car hardly makes it at 1km/h (again gas pedal to the floor).
When the car is cold, it's a bit better but when it warms up - complete hell. Changed the fuel pump relay and the fuel pump inside the tank, it didn't help.
Can crankshaft sensor be a problem? Other ideas? THANK YOU!
Hi P0115 is coolant sensor, you really need to use a good scan tool that can read live data, I suspect the coolant sensor is reading very low at times (maybe minus 40°C) or not at all open circuit, the ECU then defaults to limp home and sets idle speed high. You could check with ohm meter, see testing coolant sensor video. Most Hyundai Santa Fe crankshaft sensors (CPS) are on flywheel on top of the gearbox bell housing.
Hi, how did you charge the battery, it is possibly to damage the module/ECU with a boost/charger, or the problem could be you have an aftermarket alarm/immobilizer problem, that has switch on when the battery went flat. To answer your question the crank sensor sends an ac pulse to the module/ECU and that switches the coil on and off at the correct time, check my website for nonstart problems.
I've been having some trouble with my truck and hope someone can help.. To make it short and sweet, The batt went dead, so i charged it up. But now when i try to start the truck, the coil has no spark.. I put a new coil on the engine. Someone told me the crank sensor is the problem.. Does the Crank sensor work the coil or just the control module? Also my coil has 12v power on it even when the ign is turned off. Someone help with info plz
althoug this is one way to check the crank sensor this is not best way. Using a scope is the accurate and straight to the point which makes it the best way. Also by looking at the cam and crank sensor you can tell if a vehicle is whithin time or not instead of removing parts.
If you are 100% sure the spark is weak, the next step would be to volt drop the live to the coil pack (with engine cranking or running) if ok, check the ECU earths and lives.
Blackened plugs could be the engine running rich, if it is a Renault, the coolant sensors can fail and show a minus temperature all the time this may not show as a fault code, if temperature is within possible engine temperatures, this when you need a code reader with live data, this would read -28°c for example.
AskTheMechanicCoUk 1 month ago
The check engine light has not come on at any stage during the problem and investigation. Checked the dash warning light symbols by pressing the left stalk button and switching on, they all illuminated. Got a new coil pack and plugs, no improvement. Removed new plugs after 3 starts, totally blackened all plugs, checked spark strength, very weak. As the coil and plugs are good, I checked the crank position sensor as per ask the mechanic video, 225 ohms, where should I look next?
MrAiden50 1 month ago
Have a Clio 2 2003 1.2 16 valve dynamique. Problems started with 50% reduced power, max rpm 3500. Suspected air leak or fuel pressure .I have removed manifold and checked all pipes, no leak. Checked fuel tank filter, clear and good fuel pressure. Engine hardly starts now, only runs badly for a minute and stops. Checked the system for faults with expensive Snap-On computer, just showed that I had unplugged various items so cleared these. more to follow
MrAiden50 1 month ago
You need to plug the code reader back in and see if the air flow meter etc are working in live data
AskTheMechanicCoUk 1 month ago
hi, i'm testing a Ford F-150 crankshaft sensor, for this one what should be the resistance and voltage values? i'm suspecting of the crankshaft sensor because the plugs doesn't have spark and coils are ok. thanks
dehivi22 1 month ago
Hi sorry working in the UK I don’t have the values for that vehicle.
AskTheMechanicCoUk 1 month ago
thank a lot!!!
lyciferakos 2 months ago
Yes if it is a two wire (may have third earth shield) inductive type sensor, some very late cars may have three wire hall type sensor, which case follow my cam sensor video.
If you have access to code reader that can do live data just check for rpm when cranking.
AskTheMechanicCoUk 2 months ago
is this test step for all vehicles
hp11208 2 months ago
hi, mec
i hve a k20a ep3 type r honda, p0341 code was found after engine rebuilt , and i had already bought a new cam sensor replace it but engine light still goes on, what would that be ? engine code still the same.
thx for your help
ckcyk 2 months ago
Has the engine still got the same camshaft? If it has been changed, does the sensor match the camshaft? Or is the reluctor wheel damaged. Maybe there is more than one sensor available. Also check wiring and connector for damage.
AskTheMechanicCoUk 2 months ago
Honda’s have a built in diagnostics, they have a 2 pin (not 3 pin) data link under the glove box, if you bridge this, it will then flash the MIL lamp (the codes are on the internet), this would help diagnose the crankshaft sensor etc.
To test the fuel pump, when the car is working ok, turn the ignition on you should hear the fuel pump prime, do the same when it cuts out, if you can’t hear it there is a problem with the pump, relay or wiring.
AskTheMechanicCoUk 5 months ago
I have a '96 Acura TL 2.5 that cold starts fine, but if I drive it for a short distance, park it, turn it off, and then try to restart it will turn-over, but it will not start until I allow it to sit for 20-30 minutes. Had a mechanic check it & he told me that it could be the Ignition Control Module, Crankshaft Position Module, Camshaft Position Module, or fuel pump. I don't have $ for all of test all of these possibilities so I'm hoping that you can help me pinpoint the problem. Please help!
triggb71 5 months ago
The resistance for XJ6 should be 400-1200 ohms so you are ok there and it is producing voltage on cranking but this maybe slightly low for this model I have a spec of 2 volts minimum listed. I am assuming you have now spark or injector click, if you have it can’t be the crank shaft sensor .
AskTheMechanicCoUk 6 months ago
Hi, i did those test on a Jaguar 90 xj6 and the result were .667 ohms with the key on and 1.120 vac trying to strating it.
Does this mean that my problem is definitely the crank sensor? because the part its a lil expensive for me and I would like sure before i buy it. Thanks in advance!!!
RayZeroSix06 6 months ago
Hi, it is unlikely to be the crankshaft sensor, sounds more like incorrect fuel mixture, this could be an air leak, or possibly a problem with the Warm Up Regulator, this may not be getting any voltage, as you say it is idling high, and the Auxiliary Air Valve is also connected to the same live and earth and would stay open if it also has no voltage.
AskTheMechanicCoUk 6 months ago
Hello, AskTheMechanic!
1988 VW Cabriolet (1.8L CIS K-Jetronick) idles pretty high, 1500 RMP however when the gas pedal is pressed to the floor, the RPM won't go over 2900... when going uphill, the car hardly makes it at 1km/h (again gas pedal to the floor).
When the car is cold, it's a bit better but when it warms up - complete hell. Changed the fuel pump relay and the fuel pump inside the tank, it didn't help.
Can crankshaft sensor be a problem? Other ideas? THANK YOU!
514films 6 months ago
cool
hp11208 1 year ago
2004 Hyundai Santa Fe 4cy
idle high on start up and sometimes when i put it in Park or N (3-4rpm)
lately at times the engine sometimes will roll but wont start
i'm getting 2 codes: P0115 and a code for the crank position sensor.
it doesnt stall when start it just dont start at times and the engine idel real high at start up and at times when in park or N
where is the crankshaft position sensor on my santa Fe
vision323 1 year ago
Hi P0115 is coolant sensor, you really need to use a good scan tool that can read live data, I suspect the coolant sensor is reading very low at times (maybe minus 40°C) or not at all open circuit, the ECU then defaults to limp home and sets idle speed high. You could check with ohm meter, see testing coolant sensor video. Most Hyundai Santa Fe crankshaft sensors (CPS) are on flywheel on top of the gearbox bell housing.
AskTheMechanicCoUk 1 year ago
Where is the crankshaft position sensor on a 2003 Jeep Grand Cherokee
delery528 1 year ago
Jeep Grand Cherokee ZJ, WJ and WG bolt on to the gearbox bell housing. At rear of engine.
AskTheMechanicCoUk 1 year ago
Hi, how did you charge the battery, it is possibly to damage the module/ECU with a boost/charger, or the problem could be you have an aftermarket alarm/immobilizer problem, that has switch on when the battery went flat. To answer your question the crank sensor sends an ac pulse to the module/ECU and that switches the coil on and off at the correct time, check my website for nonstart problems.
AskTheMechanicCoUk 1 year ago
I've been having some trouble with my truck and hope someone can help.. To make it short and sweet, The batt went dead, so i charged it up. But now when i try to start the truck, the coil has no spark.. I put a new coil on the engine. Someone told me the crank sensor is the problem.. Does the Crank sensor work the coil or just the control module? Also my coil has 12v power on it even when the ign is turned off. Someone help with info plz
DolittleMccoy 1 year ago
@DolittleMccoy check fuses man. if the only thing was ur battery went dead....
kfafnis 1 year ago
good vid
BC21DOR 1 year ago
althoug this is one way to check the crank sensor this is not best way. Using a scope is the accurate and straight to the point which makes it the best way. Also by looking at the cam and crank sensor you can tell if a vehicle is whithin time or not instead of removing parts.
maycor1076 2 years ago
Hi, that's right but I made the video for my DIY car site.
AskTheMechanicCoUk 2 years ago
excellent, thanks a lot for this.
itsracktime 2 years ago