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trop-a-cal's avatar
trop-a-cal
Explorer
Oct 20, 2013

1997 454 GM vortec motor problem with EGR Valve

I noticed the idle down lower than normal and a weak start. Then a pinging, and loss of power after a full up when tank was almost empty. I was told the exhaust system has a valve, that recycles exhau...
ktmrfs's avatar
ktmrfs
Explorer II
Oct 20, 2013
an EGR valve that is open at idle (which it should not be) or with no throttle often cause very poor idle or stalling. had that problem with a 95S10 4.3 litre and new egr valve fixed the problem. sounds like yours is not closing all the way. If it sticks full open usually you can't even get it to idle, will stall.

don't know cost, mine was a warranty repair.

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