97 Blazer rough start Dies

what happens to your fuel pressure when it stops running? Does it stay up at all? I wouldnt rule the fuel pump out just yet or a stuck EGR. Did it start this behavior after you changed the fuel filter?

You can rule the battery out if its cranking strong each time.

my .02, maybe even try reading the codes. Theres a zillion ideas.

Check and clean the IAC valve and it's passages. The valve pintle can get gummed up with deposits and stick. May or may not be the problem, but it's easy to check.

Pete C.

If yours has the 4.3 Vortex engine, (you should tell the engine size),

Thank you all for your input. I'm going to check the fuel preassure with the vehicle off and see if it maintains. The problem was occuring before the fuel filter was changed. I have also ruled out the battery because it maintains a goo 11.5V minimum after sitting for an extended period of time. It appears to me to most likely be the IAC valve considering it is intermittant and runs fine at a regular idle speed.

I'll update everyone.

Thanks again!

Kory

snipped-for-privacy@yahoo.com wrote:

snipped-for-privacy@gmail.com wrote in news: snipped-for-privacy@11g2000cwr.googlegroups.com:

Your battery is *severely* undercharged to the pount that it's essentially flat. This may well be the root cause of your problem.

A fully charged battery is 12.65V at 80F, and 12.52V at 0F.

How to check your battery's state-of-charge:

I fixed the problem~ It was the IAC valve. I just sprayed it with some Carb cleaner and brushed it a bit and it is as good as new!

Thank you for your contribution!

Kory

Pete C. wrote: