Faulty TPS:

This is a less common problem. It also is often associated with a fault code. The computer is not able to determine if the throttle is closed or not. This problem is usually accompanied by poor/erratic running engine with little or no power.

To check: (be prepared to clear trouble code. Testing TPS will trip the check engine. If you have a scanner or Autozone nearby, they can clear code for you.)

Turn the engine off, disconnect the sensor and test it by connecting an ohmmeter (preferably an analog one) between the center and either outside pin of the sensor. Slowly open the throttle all the way and then slowly close it again. The ohmmeter should show a constant, smooth change in resistance as the throttle is moved. If there are any jumps in reading or no change in reading at all, replace the sensor. If the sensor seems ok, reconnect the sensor cable and turn the ignition on. One outside wire should be 5V, the other ground. The voltage on the center wire should vary as the throttle is opened (about 0V closed, 3V wide open). If power or ground is not present, check the wiring.

Bad connection or wiring - Check the wiring and connections between the sensor and pcm. Clean and regrease any corroded connectors with dielectric grease. Check connections if there is no power or ground, or for shorts if there is power and resistance, but no output.


Hope this blah blah helps guys. Keep us updated!

 

i was haveing the same problem with my truck just got it about a month ago. the funny thing is that it only has 21,000 miles on it i guess it dosen't take much to gum it up. cleaned the IAC and TB and took it out to test and there was a noticable difference in pick up.

 

Cheese and Rice chris......someone wanted to prove a point. I mean come on, do we really want another arguement like the Intake and Exhaust thread? Cant we all just get along?[sm=deal.gif]

 

dont mean to hijack or anything but what is the easiest and best way to clean the throttle body...possibly without taking it off or anything my truck sometimes hopes around on idle and when i push in the clutch sometimes whiich i can expect to some extent but sometimes seems like its a little excessive.

 

I did not intend to start an argument, nor did i mean to offend anyone. I am sorry if i did so. I am only trying to share accurate information on the question at hand. The question was: What can cause rough idle, or high idle. I supplied my input on the subject, and supported it with detailed reasons as to why. Someone disagreed with my input, so i went into further explination. I mean- after all, that is what forums are for, right??

Just trying to help some people out, bud.

 

Get some TB cleaner from your parts store. Take off the air intake assembly so the mouth of the TB is exposed. With the engine OFF, open the butterfly and spray down into the bore of the TB. Clean the throttle body bore, the throttle plate (especially where the butterfly rests on the bore). A clean rag and soaked with TB cleaner does a nice job of cleaning the heavy deposit areas in thebore. Pull off the IAC and clean it with small toothbrush or pipe brush. Be carefull not to damage the IAC. -Reinstall the IAC. Reinstall the intake assembly. Start engine and let idle for a few min.

Once the throttle body is cleaned, the air will be able to pass by the throttle plate as it should, and should run smoother.

 

Ok, well I'll say this. I sure hope no one thinks I was being an ***. I was just trying to be funny. For some reason I dont think it worked.[sm=sorry.gif]

 

im proally wrong, thats all i did to fix mine, however,

 

seafoam.... mine idles like a kitten purring, no hesitation whatsoever

 

uhh.....yeah......

WTF are you talking about anyways????