My blazer runs good for a bit but then its like the engine revs up and down slightly and seems like its going to cut off and it does some time. I checked the codes and it says egr and o2 is rich. I have replaced the spider injector so that should be ok. The ? is? Could she be running ruff till the egr messes up and gets stuck open and is that why the o2 says it rich and makes it run funny? If i replace the egr would it stop the o2 from saying its rich also?
EGR problem and question on 1992 Chevrolet S10 Blazer
by bud_ice in Pittsburgh, PA on March 09, 2009
ANSWER by Russ on March 13, 2009
Your surging engine may very well be related to your EGR problem. I would suspect the valve is faulty but you will need a scan tool to confirm this. If you find that the valve is bad replace it and see of the O2 sensor code comes back. If it does you could have a faulty O2 sensor also.
I have a 90 S-10 Blazer 4.3l and recently had a rough idle and stalling out after a few minutes...
I can't seem to figure this out my car started bogging up hills wouldnt go more then 20 mph so i check it all out and it said egr valve was out i replace it it solve the problem for 1 week then w...
Can you remove the EGR valve and the truck still run good
4.3L V6 multi-port FI only The exhaust gas recirculation valve (EGR) may stick open causing a rough idle and the Check Engine Light to illuminate. Our technicians tell us that a piece of carbon may...
where is the egr sensor on a 4.3 chevy and how do i take it off/?