Question about 1996 Chevrolet Cavalier
Hi I have been having problems, where the car will start but not stay running in idle, also it will run really sluggish until you get over 35 mph and all the idiot lights have come on in the car including the theft light
please help, have already dumped over $2000 in car and I can't seem to get any answers?
The reason it all goes circuslights could be that the alternator is overcharging.
The charge rate increases as the load and engine revs go up but only supposed to be a little, thats what the voltage regulator on the alternator is for.. when the regulator fails and alternator is overcharging eventually enough power is sent through the ground to light everything up and the computer cannot run properly.
High voltage levels cause sensors to read incorrectly so the computer cannot manage the engine.. Suggest you check out the charge cicuit at idle, at 2500 and at 3500 revs (briefly!)
Charge should be between 13.5 at idle, to 14.6 at 3500
Its a starting point for diagnosis.
Note that putting the alternator on a machine at Autozone will not necessarily pick up the fault - it needs to be checked ON the vehicle.
Hope this helps
Posted on Jan 07, 2009
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Posted on Jan 02, 2017
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