Foot note I did take it to a repair shop at my witts end and of course it would not act up then or on the test drive, he could not find any thing wrong except my throttle body is worn. Could he be telling the truth? No codes came up on the obd2 Im leary of his solution he charged me 90 bucks and said sorry its a discontinued part and sent me on my way. HELP??
JunkFixer 7/11/2010This sounds like a gnd issue. Voltage drop testing of the engine and PCM gnds would be a good place to begin.
Yes, he could be telling you the truth. A repair kit is available for these old throttle bodies but they are not easy to install. Often, machining is req'd.
JunkFixer 7/11/2010You sound like you're smart enough to remember the KISS principle (Keep It Simple, Stupid). It's far too easy to outsmart ourselves when going after a problem whose cause is not readily apparent. If you need some direction on performing voltage drop tests or specific gnd locations, just ask. Lets begin by using Occam's Razor, not Occam's toolbox. I'll help ya.
HouseCallAuto 7/11/2010If you have not yet replaced the throttle position sensor and / or the idle air control, that should be done as it is likely for one of them to be the cause of your high idle. The TPS fails on EVERY 5.8 eventually and there are not always codes set. Same with the IAC.
quzzeeq 7/11/2010Thank you for taking the time to help, I have found a few places that sell after market throttle bodies as well as one that refirbushies them and tacks on a 3 year w. But I really dont want to have to replace it if I dont have to, I am sure I could do it after all I maybe a girl but I have only owened fords and have mostly done all the fixens for all of them except the heavy duty stuff of course. I will start with your suggestion first thank you. I keep ya posted.
quzzeeq 7/12/2010Yeah its all better now I think! So Far so good. And yes it was the IAC. I tested it before I bought it on-a-count-of it was a 75.00 part. Like I said all is well for now thank you for all the help everyone.!