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post #1 of 7 (permalink) Old 08-02-2008, 07:40 AM Thread Starter
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Old Oldsmobile problems

A friend of mine has a Oldsmobile Ciera (Don't know the year) and it has gone insane. After the car is warm up it shudders and the fastest you can go is 20MPH. You can put the pedal to the metal and it wouldn't make a difference
The brake light and Check Engine CEL lights flicker and flash. The car isn't a OBD-II so my scanner doesn't work and we tried every troubleshoot we can think of. Can it be the onboard computer?

Trans doesn't want to shift, top speed is 20MPH and sounds like the motor will stall any second.

Fresh oil, trans fluid, new spark plugs, cables, fuel pump, O2 sensors, hoses and I think new head gaskets also.
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post #2 of 7 (permalink) Old 08-02-2008, 09:26 PM
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MAP sensor?
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post #3 of 7 (permalink) Old 08-02-2008, 09:55 PM
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Sounds like its in Valet mode. Not sure if that model came with Valet mode or not but thats what Valet Mode does keeps the Valets from beating the hell out of your car its normally activated with a special key but when it screws up it just engages when it wants.
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post #4 of 7 (permalink) Old 08-03-2008, 08:21 AM
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If it's a 1988 and up: These car are equipped with a coil module, maybe the plate where the three coil is fix is faulty.

If it's a 2.8L or a 3.1L it is in the front off the engine beside the radiator, if it's a 3.3L or a 3.8L it is on the top of the engine easily accessible.

Older than 1988 didn't know

Last edited by Keylies; 08-03-2008 at 08:23 AM.
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post #5 of 7 (permalink) Old 08-03-2008, 10:49 PM
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Have you checked the fuel filter? checked for vacuum leaks?

Is it old enough to have a carb? stuck choke?

Last edited by lextrep; 08-03-2008 at 10:55 PM.
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post #6 of 7 (permalink) Old 08-06-2008, 11:24 PM
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Check the fusible links down by the starter. I ran into one that was going nuts like that and it was loosing power to the transmission, fuel pump, and sometimes the engine ECM because of a corroded fusible link. The tech 4 engine was especially bad for this. You will have to pull on them to see if they are ok, you cant usually see the corrosion. Youll know if the link comes apart.

I ran into another one that was going nuts with the 3.3 engine and one of the injectors had a dead short in its coil. With it running unplug the injectors one at a time and see if the issue goes away. You should know instantly. You can also check the injectors with a multi meter.

If thats not the case, fuel pump, coil module, or a big vacuum leak.

You can jump terminals A and B in the diagnostic plug and count the flashes on the check engine light to get the codes if its OBD-1.

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Last edited by Daytrepper; 08-06-2008 at 11:27 PM.
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post #7 of 7 (permalink) Old 08-07-2008, 09:28 AM Thread Starter
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We gave up and took it to my my girl friend mechanic. He is the only guy I trust, if I can't do it then he gets to do it.

Anyway, here what was wrong.

Ignition Coil
Timing off
wire harness fused to block that caused the brake, check engine light to flash and also could of effected the ignition coil.

We let the mechanic fix the timing and we fixed the rest by using parts from the yard. Spent a total of 80 bucks.
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