I was given a 1997 blazer 4x4 with a bad transmission i just replaced it so this is the first time i have driven it here is my problem runs great at highway speed or around town but in stop and go traffic it seems to miss or run rough when you first stop it also set a code which i have not been able to pull yet i have a code reader at home i will check tonight what it is thx for the help

 

*MOVED TO '2ND GEN TECH'*
The code will probably help, and please use punctuation and capitalization in your posts. It makes things much easier to read.

 

The code that i pulled was P0146 bank 1 sensor 3 any help is appreciated

 

Have a read through P0146 Explained.

 

I have now thx for the info I hope it is just a bad hO2s will try that first.
Would this cause the motor to act like it was going to stall when stopped at a stop light. It acts like it is missing for just a few seconds then it is fine.

 

A vacuum leak can cause idle problems. So can a clogged or stuck EGR valve.