1991 Chevrolet S10 Blazer Q&A

1991 Chevrolet S10 Blazer Question: rough running at times

Wife drives during bad weather only, so it sits 85 to 90 % of the time in the garage covered up. Sometimes when she drives it to work which is about 30 miles one way, about half way there it starts to run rough. I bring her a different vehicle to drive on into work with and then drive the blazer home. It sometimes runs okay when I drive it back home and other times it runs rough on me.[coughs and sputters, and jerks] I usually park it in the garage till the next time she needs it and it might run good for a few trips in to her job and then all of a sudden it starts acting up again. Whats wrong with it? Any help would be appreciated. -
Answer 1
Maybe try a bottle of Chevron Techron to help clean the injectors or a tune up if that hasn't been done already -
Answer 2
if that wont work. then try replacing a few parts. my cuz had the same problem. we found out that the engine was messed up. so we replace a few things. -
Answer 3
if you have the 4.3 carb can build up in the EGR Valve and cause it to run like crap. I personally had this problem w/my 92 4.3 TBI, they can be cleaned but be careful as they are delicate inside.I also used seafoam in intake (fogged the engine) and gas tank if you do this read the instructions carefully. Also my blazer is notorious for running bad when Distributer cap is corroded Sp.?, they have no seal and draw heavy moisture. I had to replace mine almost every spring until I bought a Napa Gold. -
Related Items:
I have a 90 S-10 Blazer 4.3l and recently had a rough idle and stalling out after a few minutes of run time. The check engine light came on at highway speeds and I pulled a code 32 of the ECM , ref...
My Blazer has been sitting for about 10 months and has been started a few times within those months.. It now runs very rough.. when first started, it idles very hard up and down, up and down. The...
it has 244000 thousand on it. it was running fine now it has a hell of a miss.at a light it seems to run so rough the whole tuck shakes to know end and almost wants to stall out but it dosent new p...
engine is loaded up with fuel, i can bring the rpms up for a few seconds and the engine will run and idle normally, about half of the time,mostly during cold weather, this happens and will not cle...
4.3 vortec blazer vin W have replaced IAC three times in past 2 years starts and runs good 85% of the time check engine light comes on with code #32 starts running rough,don't dare shut it off...