1990 Oldsmobile Delta 88 engine stalls or won't restart at

1990 OLDSMOBILE DELTA 88
130,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BB650
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When cold the engine starts and runs very well untill it reaches about 180 deg.F, up to this point I can turn the ignition off stopping the engine and then restart as often as I like. After reaching about 180 or operating temp. the engine may stop abruptly at any time, or if I turn the ignition off to stop the engine it will not restart. At this point I have determined there is no spark coming from the ignition coil bank to the spark plugs. After the engine cools off completely it will restart and run sweet as can be untill it reaches operating temp. and looses spark again or is turned off, at which point it will not restart because there will be no spark. I have replaced the ECM with a spare one I know to be good, but the result is still the same. I hope you can help. Thank you, Keith (bb650)
Oct 12, 2009 at 7:13 PM
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BIG_JAY
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Does this car have the 3 coils with 2 ires per coil on it?
Oct 12, 2009 at 7:27 PM
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BB650
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Yes there are 3 coils each coil feeds two spark plugs.
Oct 12, 2009 at 7:39 PM
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BIG_JAY
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The problem sounds like you have a bad modual. That is the black thing under the coils that the coils bolt to. I would moniter fuel pressure to make sure that isnt the problem first but it is common for a weak ignition modual to cut off when it is hot.
Oct 12, 2009 at 7:46 PM
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BB650
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Do you think the problem could be the crankshaft monitor? I am reluctant to buy a coil module unless I am very sure that it will fix the problem, I priced one out at $425.00. That is a little too much to spend unless I am sure. Thanks
Oct 17, 2009 at 8:34 AM
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BIG_JAY
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If u price it out on the Internet it will b cheaper. The only thing I see wrong with it being a crank sensor is that it only happenes when hot. U will need to drive it with a scanner hooked up to it until it dies on you to b able to see if u are getting a crank signal by watching the data stream. Moduals can get hot n over heat crank sensors usually don't. To b 100% sure u will need a scanner with a data stream.
Oct 17, 2009 at 8:39 AM
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BB650
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I bought the ignition modual online and after instalation there is no difference. Still looses spark at operating temp. I have just ordered the crankshaft position sensor but I am wanting to know if there are any other parts that might cause this problem? I seem to be grasping at straws. I do not have access to the fancy gismo with the data stream monitor as you suggested. I am soon going to be into it for more than the car is worth. Thanks
Nov 5, 2009 at 1:27 AM
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BIRCHMANDUDE
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[quote:c8224feec6="bb650"]I bought the ignition modual online and after instalation there is no difference. Still looses spark at operating temp. I have just ordered the crankshaft position sensor but I am wanting to know if there are any other parts that might cause this problem? I seem to be grasping at straws. I do not have access to the fancy gismo with the data stream monitor as you suggested. I am soon going to be into it for more than the car is worth. Thanks



Did this work, I have one that is doing the same thing[/quote:c8224feec6]
Nov 21, 2009 at 9:30 AM
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BB650
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Yes the cranckshaft position sensor was the problem. After installing it the engine runs fine now. It is worth a try, and it will not break the bank account.
Nov 22, 2009 at 11:06 AM
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