When my car is cold it will stumble while trying to get on the gas. Once the temperature gauge moves a tiny bit it will run right. I did the paper clip thing, and I got code 34. So I replaced the maf sensor, relay, and the burn off relay works. I talked to a buddy and he said it could be the ninth(cold start) injector. I'm just out of options to try.

 

Here is a troubleshooting flow chart to try: http://www.chevythunder.com/maf_code_34.htm