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.

any codes?
when was tune up last done?

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.

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
https://blazerforum.com/forum/attach...ine=1411830786

The Egr valve is closed at idle and I checked to make sure it isn't frozen it moves freely.

Well 90% of the time we don't check the most basic stuff 1st. It was a PCV valve no joke a 5 dollar fix lol

At least it was not expensive and its fixed!

I cant tell you how shocked I am that it was that simple. lol