When the misfire monitor goes complete does that mean there is no misfire? I'm trying to help out a friend with an issue I think we have fixed just wanting to be sure.

 

What was the issue?

 

We think we fixed it and the monitor went ready, just wasn't sure if that ment it was fixed.

 

I think by 'monitor ready', the PCM now understands how to interpret which cylinder is misfiring, if any.....

 

its still running a little rough not sure if its missing or not, don't have any codes. can the throttle body cause a miss or rough idle if its dirty? if so why?

 

If it isn't passing enough air, it can cause stalls, or low idle, but, that's about it. Rough idle is going to be fuel, or ignition.

Does it idle rough as soon as you start it up, or, does it take a couple minutes to show up?

 

So I got a p0300 p0302 p0305 p0307

 

Is your plenum fixed? How many miles on the truck?

 

Doesn't have one. Air gap kit.

 

Clear codes, reset the PCM, disconnect the front O2, and drive it for a couple days. (will set an O2 code.....) See if the misfires go away.