1988 GMC Sierra 1500 5.7 V8 High Idle,EGR not hooked up

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buddha131
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Joined: Sun Nov 22, 2015 11:14 am

1988 GMC Sierra 1500 5.7 V8 High Idle,EGR not hooked up

Unread post by buddha131 » Sun Nov 22, 2015 11:28 am

My 88 gmc runs good but has high idle, While a New EGR has screw in it. When I hooked Egr up, truck runs, Idle does come down, but when gas is applied the motor wants to stall or miss fire while driving.
Can my timing be off, Could use help finding this problem Please.