2000 Jimmy 4.3l P0452 And P0306 Codes

[Credwards]

My 2000 GMC Jimmy 4.3L had two codes stored in it, a code p0452 and a p0306, I reset the codes and the p0306 was the only code that came back. The vehicle is missing badly at idle. I checked the cap and rotor and they look fine, they were replaced approx. 4 months ago. I also took out #6 spark plug and it looked ok also but I replaced it anyways and it still is missing. any help with this would be very helpful.

[Draenor]

What about the wires? You didn't mention if they were replaced.

[Credwards]

My 2000 GMC Jimmy 4.3L had two codes stored in it, a code p0452 and a p0306, I reset the codes and the p0306 was the only code that came back. The vehicle is missing badly at idle. I checked the cap and rotor and they look fine, they were replaced approx. 4 months ago. I also took out #6 spark plug and it looked ok also but I replaced it anyways and it still is missing. any help with this would be very helpful. Yes The wires were also replaced.

[Credwards]

Yes I replaced that wires the same time I replaced the cap, rotor, plugs and wires all at the same time 4 months ago.

[Supertech64]

Did you replace the cap with a Delco one? I have seen alot of problems with aftermarket ones.

[Credwards]

Yes everything was replaced with GM parts.