I recently took my 95 Blazer to Minneapolis (about 1,000 miles round trip). It currently has 143,000 miles on it. Ran like a top mostly.
A few things though:
Ever since I've had this truck (96) if I get it over 65 on the interstate for a sustained period of time, the Check Engine Soon light comes on. It eventually goes out and stays out for the rest of the trip. The truck runs fine, it just seems wierd to me. Happens after I run it for about 10 mins or more at constant speed above 65.
This time on the way back, it ran like a top on the interstate but when I got into city driving it idled like crap. Cut out, rattling the pipes it was shaking so hard. I figured bad gas (bp in Des Moines looked run down), or water in the tank. After I ran it down to under a 1/2 tank I put in some other gas. Ran like crap for a while and then all of a sudden was fine.
Has anyone encountered this? Should I be concerned about the Check Engine Soon light? I tried to buy a puller but the mechanic said it's a hybrid (OBC?II connectors hooked to an OBCI box). Does that sound right?
Any help is appreciated.
Art