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Author Topic: 1987 chevy v10  (Read 2991 times)

Offline manitobamike

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1987 chevy v10
« on: November 19, 2010, 10:43:26 am »
was wondering if anyone had an idea what would make my truck run rough when its cold and it back fires a couple times after i start it , but after idling for about 5 mins it smooths out and is fine! could it be the egr valve?
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Offline VileZambonie

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Re: 1987 chevy v10
« Reply #1 on: November 19, 2010, 12:08:49 pm »
The problem with EGR systems is most commonly caused by the GR solenoid sticking allowing vaccum to apply the EGR. you don't want the EGR open at idle even just a little bit. A simple way to determine if this is the problem is to unplug the vacuum source at the EGR valve.
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Offline manitobamike

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Re: 1987 chevy v10
« Reply #2 on: November 20, 2010, 04:18:09 pm »
thank you very much
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