Wanting to stall... runs rough... voltage fluctuates.

Wanting to stall... runs rough... voltage fluctuates.

Postby Big Red '87 [OP] » February 10th 2016, 2:15am

I have a 1987 GMC safari that is in great shape but I noticed sometimes at a stop lights, or after a long drive then park for a while then start it up again, it wants to stall but most of the time it does not happen only runs rough for a bit and also while driving or idling the voltage gage drops sometimes as far as 9v and the oil gage goes crazy... then it's fine and runs normal. So I then I tested the Battery and Alternator extensively and they are both working perfectly any ideas?

thanks Dan
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Big Red '87
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Re: Wanting to stall... runs rough... voltage fluctuates.

Postby kennysmoke » February 10th 2016, 2:29am

Sticking EGR Valve?
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Re: Wanting to stall... runs rough... voltage fluctuates.

Postby Big Red '87 [OP] » February 10th 2016, 2:59am

Would this cause voltage drop and oil gage to fluctuate rapidly.
Original Poster [OP]
Big Red '87
Fueling (Empty tank)
Fueling (Empty tank)
Years of Membership: Big Red '87 has been a member for 5 full yearsBig Red '87 has been a member for 5 full yearsBig Red '87 has been a member for 5 full yearsBig Red '87 has been a member for 5 full yearsBig Red '87 has been a member for 5 full years
Posts: 9
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Van Model Year: 1987
Van Make/Model: GMC Safari
Extra Info: LT 4.3L V6 RWD

Re: Wanting to stall... runs rough... voltage fluctuates.

Postby kennysmoke » February 10th 2016, 3:10am

Yes... mine was doing it a couple weeks ago... as the van starts to stall you will see the voltage drop and the pressure fluctuate ....
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Re: Wanting to stall... runs rough... voltage fluctuates.

Postby kennysmoke » February 10th 2016, 3:12am

I had a chunk of carbon making mine stick.
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