So If I am stopped at a light or even if I put it in park My truck will idle at around 500rpms but then it will rev to about 1000rpm then back to 500.. then to 1000 and back to 500. Any ideas ? I have an 03 4.7 CAI, Flowmaster, and Superchip tuner.

 

vacuum leak? Dirty TB? Bad TPS?


Those are my first thoughts.

 

cool I check the CIA and clean the throttle body, if that does not work I'll check the sensor. Thanks

 

can you hear a vacuum leak?

 

im gonna put my money on a bad TPS. its dipping to 500 then spiking to 1000 because its trying to stall so the pcm says nooooo give me gas!

 

that makes more sense, a vacuum leak would only be aprox 100 rpm or so difference.

 

Now last night it was only jumping up about 200 rmps. It may be a vacuum leak since the CIA is only a few months old. I thought I put it on nice and snug but when it comes to intakes I've had my fair share of vacuum leaks coming from the craziest places. I am going to take it to my buddies shop this weekend and put it on the machine and see what it pulls up.

 

your air intake won't cause a vacuum leak
have you tried calibrating your TPS?

 

Yeah, I'm gonna need you to come in on saturday and work on those TPS reports.

 

I have not tried calibrating my TPS. How would I go about doing that ? I tried to search for it couldn't find it. Yeah it looks like I will be going in on Saturday to finish my TPS reports...... Ha ha ha ha Love that movie !