s10 stalling in idle no code

01 4.3 changed fuel filter, checked fuel pressure. sometimes idles fine. always runs good going down the road.been happening couple weeks now. doesnt seem to matter hot or cold. no rhyme or reason.Code came on other day, read O2 sensor Bank 1 sensor 2.Replaced driver side O2 reset code. no change code has not come back on.going to test ignition module 2mor. any ideas?

I know this may sound wierd, but I had this same symptom for 2 years. It took replacing fuel filters, sensors etc before we figured out it was the fuel pump. After the symtoms you describe above happened a few months later my blazer would randomly stall, but then start right back up.

I know this is a pricey fix, but you may want to look into that. I know that when I stalled if I went and kicked my fuel tank it would be fine for a while. Thats what got me going in the right direction.

Is the IAC valve holding good idle.
What is idle RPM in gear and out of gear?
What are the rpm when it stalls?

Does it stall in gear or out of gear?

What was your fuel pressure readings?