Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
1996 Firebird Trans Am
- nate.nogard
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7 years 7 months ago #20938
by nate.nogard
1996 Firebird Trans Am was created by nate.nogard
Long story short, I have a 1996 Firebird Trans Am with a p0336 trouble code. I have checked the power, ground, and signal coming from the sensor. The sensor has good power and ground going to it, and the sensor is producing a square wave like it should. I was wondering what the next step would be to diagnosing this problem, I am stumped. I have read on forums and some have said this can be due to a distributor fault, but I wasn't sure how to proceed from there. I don't want to rip the front of the engine apart without knowing for sure. So, if you have time in your busy schedule, I would be grateful for any guidance you are able to give... Thanks!
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- Chad
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- I am not a parts changer.
7 years 7 months ago #20949
by Chad
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Replied by Chad on topic 1996 Firebird Trans Am
6 or 8 cylinder?
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
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- nate.nogard
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- Chad
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- I am not a parts changer.
7 years 7 months ago #20952
by Chad
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Replied by Chad on topic 1996 Firebird Trans Am
Copied and pasted:
The Crankshaft Position Sensor is mounted in the engine front cover assembly and works in conjunction with a 4X reluctor wheel on the front of the crankshaft. The Crankshaft Position (CKP) sensor has a B+ power supply, a ground and a signal circuit.
As the crankshaft rotates, the reluctor wheel teeth interrupt a magnetic field produced by a magnet within the sensor. The sensors internal circuitry detects this and produces a signal which is read by the PCM. The PCM uses this signal to accurately measure crankshaft velocity which is a variable used to detect misfire. This sensor is not used for spark or fueling. For this diagnostic the PCM monitors the Crankshaft Position Sensor signal, and the Low Resolution and the High Resolution signals from the distributor. During normal operation, at the falling edge of a Crankshaft Sensor signal pulse (signal voltage transitions to low), the PCM starts counting High Resolution pulses. The counter will increase until the PCM detects the leading edge of the next Low Resolution signal pulse (voltage transitions to high). The PCM monitors the number of High Resolution counts to verify proper CKP sensor operation. The scan tool parameter that displays the results of this calculation is CKP:Lo Resolution Angle. The value displayed is the number of degrees that the camshaft deviates [either advanced (+) or retarded (-)] from its normal alignment with the crankshaft. During normal operation, on a vehicle with little or no timing chain wear, the value displayed would be near 0 Dev.
CONDITIONS FOR SETTING THE DTC
^ Engine Speed between 500 and 4000 RPM (LT1), 675 and 4000 RPM (LT4).
^ Ignition Voltage between 9 and 17 volts.
^ CKP:Lo Res Angle goes outside of the range from -10° Dev to +7° Dev but is still within the range -21° Dev to +51° Dev.
The Crankshaft Position Sensor is mounted in the engine front cover assembly and works in conjunction with a 4X reluctor wheel on the front of the crankshaft. The Crankshaft Position (CKP) sensor has a B+ power supply, a ground and a signal circuit.
As the crankshaft rotates, the reluctor wheel teeth interrupt a magnetic field produced by a magnet within the sensor. The sensors internal circuitry detects this and produces a signal which is read by the PCM. The PCM uses this signal to accurately measure crankshaft velocity which is a variable used to detect misfire. This sensor is not used for spark or fueling. For this diagnostic the PCM monitors the Crankshaft Position Sensor signal, and the Low Resolution and the High Resolution signals from the distributor. During normal operation, at the falling edge of a Crankshaft Sensor signal pulse (signal voltage transitions to low), the PCM starts counting High Resolution pulses. The counter will increase until the PCM detects the leading edge of the next Low Resolution signal pulse (voltage transitions to high). The PCM monitors the number of High Resolution counts to verify proper CKP sensor operation. The scan tool parameter that displays the results of this calculation is CKP:Lo Resolution Angle. The value displayed is the number of degrees that the camshaft deviates [either advanced (+) or retarded (-)] from its normal alignment with the crankshaft. During normal operation, on a vehicle with little or no timing chain wear, the value displayed would be near 0 Dev.
CONDITIONS FOR SETTING THE DTC
^ Engine Speed between 500 and 4000 RPM (LT1), 675 and 4000 RPM (LT4).
^ Ignition Voltage between 9 and 17 volts.
^ CKP:Lo Res Angle goes outside of the range from -10° Dev to +7° Dev but is still within the range -21° Dev to +51° Dev.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right.
Please Log in or Create an account to join the conversation.
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