not throwing codes

[egeyer82]

Alright Guys, I'm experiencing a terrible stutter/surging (poor throttle response) through 1st & 2nd gear (manual ) The truck idle's fine. Runs perfectly fine beyond 3rd gear... But there's no code to scan for?? It occasionally gives me a check engine light for an upstream 02 sensor, but i was thinking EGR problems? Passages blocked? Anyone have this similar problem?

 

[1Aauto]

I would start with replacing the 02 sensor and see what happens.

 

[egeyer82]

Rock solid stuff....... awesome. I'm gonna go the free route then and finally install the headers it came with, which replace that 02 sensor anyways.