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Re: 1998 Sunfire 2.2L, charging system problems
I a had a charging/voltage problem with my 95, it was fine at idle but when you put it in gear the voltage would drop to just over 9 volts while driving down the road.
It turned out to be the ground wires.
There is several hooked to the side of the frame under the battery.
The one that was the biggest problem was there was no ground from the engine to the chassis (do to corrosion in the wires). The battery ground is connected to the engine mount bolt at the trans housing.
There should be a ground wire to the chassis from the engine and the ground connection at the battery may or may not have one to the chassis.
I ran a new ground from the engine to the chassis and the problems went away.
This only showed up when the car was out of park, the ground point on the engine is also used by the transmission and it was back feeding into the trans or ecm looking for a ground.
IF you check the threads you will find these are known for ground wire problems under the hood.
Are your head lights dim? kind of yellow?
check it out let us know
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