Originally Posted by CivicRage

At 117,000 miles my pcv valve was finally changed and i noticed 0 difference. It didnt help my idle or acceleration any. It also wasn't clogged. I wonder what clogs them up...and yeah..what a dirty ***** it was to change on a 99 civic. I had to get underneath the car and then it broke off in the crankcase . Spent 2 hours trying to pry the **** out with about 2 inches of hand space to work with..

Gearbox. Forget all i asked. I just wanna know this: What is your map sensor reading at idle?? i already know my tps is good. My map sensor is at 10.0 now at idle.

I've now ruled out the o2 sensors and tps.

Originally Posted by gearbox

if that is how you expect to get help for a problem, by going around to forums and telling everyone how worthless they are, im not surprised nobody has bothered to say anything. you need to understand we are not trained mechanics, just regular people with other interests, one of which is cars, but not our main profession. so ofcourse you have to expect educated guesses and random comments. if many different mechanics could not solve your problems, how do you expect some group of online forum members to do any better except offer suggestions? im sure you are frustrated, but cars are complicated. thousands of parts, lots of things can go wrong, and nobody knows everything about how an engine works. have you tried hooking up your data logger to see what the throttle positions are, it should be 10% closed and 90% when fully open. is your throttle plate loose, is the gasket between throttle body and intake manifold leaking air, what about the iac gasket, etc. unfortunately with so many parts, you have to go thru and slowly eliminate parts. like i mentioned in your other thread, the tps sensor could have cracked internally and you would never even see it unless you take it apart and look. the sensor is plastic and has a strong spring loaded mechanism with a plastic key hole. the throttle body connector is metal, so it can easily crack the sensor over time and throw off the readings. if you have an older pre-2001 civic, there is also a fast idle valve that can go bad or get loose inside. it can cause erratic idle and stalling. we are trying to help, but you cant expect a quick fix. try checking the pcv valve too.