Question about 1991 Oldsmobile Cutlass Ciera

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Code 53 ecm over 17.7 volts

Car runs very rough on idle but with a wide open throttle it run fairly well.
alternator is ok and charging fine. Is my problem a bad ecm? sometimes its very hard to start, after its been running a while. I have replaced everything, crank sensor, icm, coils? Can anybody help?

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Two month ago i started with the similar problem in a olds 90 2.3 tested all the sensors and... I realizad it´sa bad ECM or probably the Prom only I reasearched about and usually doen´t last more than 8 or ten years . they say are the component on it ..sympthoms: hard idle , start and sudenly stop except if you go to the HW ....and finally goes to LIMP function and finally blocks the inyection or the ignition control module ... I suggest try to test ur ECM or the Prom on it...

Posted on Jul 04, 2008

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Have you taken an actual voltage measurement at the battery?
If the voltage is in fact over 15 volts, it can cause all sorts of problems. If that is the case, the alternator will need to be replaced.

Posted on May 22, 2008


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