1990 k5 blazer 5.7 idle issue
#1
1990 k5 blazer 5.7 idle issue
Hello again, So I'm temporarily stumped. My k5 will not idle without giving it gas. Idle air control valve replaced and connector, new fuel injectors, timing Is perfect, Drives perfect. Until you come to a stop then dies out. I am stumped. Any information will help thank you.
#3
There is no codes at all. Don't know the last time the tune up was done. But the plugs and wires don't look to be in that bad of shape so im assuming not too long ago. But im kind of ruling out spark being the issue. Because at high rpm she runs awesome no miss, no stumble, she doesn't skip a beat. This is only idle. Next on my list of possible causes. Because I need to give it gas to start it. Not getting enough fuel. Maybe the fuel pressure regulator. Next day off I will replace that.
#4
check your egr valve. if they start to stick wide open they will cause a heck of a vacuum leak and cause your truck to die out, bypass it or block it to see if it fixes your problem.
it kinda looks like this
it kinda looks like this
#5
The Egr valve is closed at idle and I checked to make sure it isn't frozen it moves freely.
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