Parts of my question has been ask in other post, but I'm still having issue's. My blazer does not idle good. going down the road everything is fine. I have already replaced my IAC valve,but it did not help. what other sensors or idea's does anyone else have. I have also aready looked at the EGR valve, that is good. any pic's of under the hood with sensors I could look at ?

 

You could check the Nut Kit. Its the supply and return lines that go to the CPI spider under the plenum. A simple fuel pressure check after the key is off for a couple minutes should do the trick. That was what my rough idle problem was, well, as well as plugs.

Nathan

 

Perhaps the distributor is gone. It will run but not well if the spark advance components are toast.