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Re: 97 buick lesabre problems
Did you do or have a Crank sensor Variation Learn Procedure ?
The crankshaft position system variation compensating values are stored in the PCM non-volatile memory after a learn procedure has been performed. If the actual crankshaft position system variation is not within the crankshaft position system variation compensating values stored in the PCM, DTC P0300 may set (refer to Diagnostic Aids for DTC P0300).
The Crankshaft Position System Variation Learn Procedure should be performed if any of the following conditions are true:
DTC P1336 is set.
The PCM has been replaced.
The engine has been replaced.
The crankshaft has been replaced.
The crankshaft harmonic balancer has been replaced.
The crankshaft position sensor has been replaced.
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the problem that you're having is caused by a code DTC you need to replace the crankshaft position sensor part number 10456607 I have a 94 GMC 1500 v6 this bulletin is on the Internet GM Technical Bulletin reference number 00 06 04 014 I hope this helps good luck
sorry turns over means ZERO the crank shaft can spin or not the starter can in fact spin and crankshaft not. and some think turns over means, engine runs. now that fact makes turns over, a dead statement.
the word is cranks over, the engine cranks over robustlyl and then the engine runs. then runs for more that 3 seconds, and the ASD relay holds. (step by step his works like this ,93 to now)
wont crank ? (clear statement in fact) cranks ok, (crank shaft spins fast) can be seen and heard. runs for 3 seconds? and stalls (ASD relay drop out) can be seen. runs for 5min and stalls. (complex) runs for hours and stalls. (even more complex) all are key facts to the solution.
tell more..... tell all it does good bad or ugly for better suggestions!
- Crankshaft position sensor harness is open or shorted
- Crankshaft position sensor circuit poor electrical connection
- Faulty crankshaft position sensor
- Signal plate may be damage
- Starter motor may be faulty
- Starting system circuit
- Dead or weak battery
If the engine cranks at a normal speed,and the starter seems not to be dragging ,there should be a hot enough spark to start,and run.
Check for a voltage drop in the starting system.Make a visual inspection of the battery cables, and all the starter connections, tight,loose broken,corroded,clean as needed. ect. Check for a bad connection or corroded wiring near the battery,a wire that comes off the positive battery cable may not be feeding the ignition the voltage needed,since the starter takes a good bit even if it is in good condition.Look for a starter relay between the battery and the starter,check cable connects.Check engine grounding cable too. You could have bad coils or a bad ign.module or a bad crank sensor. You may ask a jobber to test the module first.Before you buy any coil pack,or crank sensor. I hope this helps you some.The crank sensor is not expensive,just the labor will be.
It is very likely the part that is giving you the problem is a Crankshaft Position Sensor, they go open circuit when they get hot, then after it cools it becomes a good circuit again, this is very frustrating, had the same issue with my Buick a few years ago, replaced the coils and the ignition module at a cost of hundreds, DID NOT CHANGE A THING, the crank sensor fixed the problem and was $30.00 from Buick.