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Eighty Eight Includes the '97-'98 Regency and '96-'99 LSS Models |
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02-29-2016, 05:32 PM | #1 | |
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Idle and Ignition Trouble
My car is a 1990 Oldsmobile Delta 88 Royale Brougham with a 3.8L GM motor. The car is having trouble with idling(low a lot, need to hold gas pedal) and the codes from the computer come as follows:
14=Coolant Sensor read 282 for a time 24=VSS found speedometer measured below 3mph while car was in 4th gear(overdrive) 41=Cam Position Sensor(magnet is missing) 42=The EST signal did not change when the ECM applied bypass voltage to the ignition module. I have replaced the coil and module, as they flat out failed. The battery has low capacity, but can start the car. There is a new Idle Air Control valve as well. Thanks! |
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02-29-2016, 08:44 PM | #2 | |
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Re: Idle and Ignition Trouble
well for sure check the connections at the temp sensor, if OK replace it, Check this link http://www.pontiacbonnevilleclub.com.../topic745.html
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02-29-2016, 09:05 PM | #3 | |
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Re: Idle and Ignition Trouble
Hey thanks for the link to the tutorial. I didn't realize that could be serviced in that way, I will do that so I can change the timing chain as well as the magnet. Thanks. And from another place I consulted, the ECM may have bad wiring to the systems or vice versa or the ECM is going bad. I will do a short test, make sure no shorts. And then maybe switch out ECM(I have an extra lying around.)
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03-04-2016, 08:20 PM | #4 | |
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Re: Idle and Ignition Trouble
Hey everyone, my issue is fixed now. I figured it best to inform everyone how and why.
So as you read about my problem, I decided to put in a different computer I salvaged for free(aren't I lucky?) and put in my PROM from my computer. Instantly my problems were fixed. My guess is something in the computer was shorting or a bad connection of some kind. Fortunately in the year range and make of Olds, buick, etc. the computers are compatible basically 88-92 or so across many models. And now my car works PERFECTLY and I only get my code for the camshaft sensor, which I will fix in the future. But if you have a similar problem, do consider the possibility of the wiring from the sensor, in my case coolant temperature sensor, being bad and having a short or bad connection. |
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03-05-2016, 08:17 AM | #5 | |
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Re: Idle and Ignition Trouble
Good deal
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03-20-2016, 10:54 PM | #6 | |
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Re: Idle and Ignition Trouble
I replaced many, many ecm's to repair code 42, often accompanied by 2 or more other codes.
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03-30-2016, 01:08 PM | #7 | |
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Re: Idle and Ignition Trouble
Late 80's to early 90's ECMs were bad......even the remans right out of the box.....
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