Question about 1990 Oldsmobile Cutlass Ciera
This problem seems to worse on warm days,it will not start if you turn the car off then try and start it..but if you wait 15 to sometimes 30 mins it will start...and it has on 2 occasions stop running while driving it,no check engine lights or codes show...it cranks fine when this problem accures....?????
Which engine is this? and also do you have a TACH gauge?
check for spark when it wont start there is a common problem with the loss of crank signal on these cars with 2.8/3.1 engines.
If you have no spark its either a crank sensor or the ignition module going bad, but the problem is you need to verify which one it is. having a tachometer would help diagnois this. if you have a tach signal and no spark most of the time its an ignition module but you would need a lab scope to 100% know which one it is. the modules are very common on these engines.
what happens is the crank signal goes to the igintion module. and then the module loses it most of the time cause the module is supposed to send the crank signal tot he ecu. you would have to make sure the signal makes it out of the module and into the ecu. if you get a signal out of the module then you have more severe problems. that need in depth diagnosis.
Posted on Feb 09, 2009
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