Ok forever now I have been trying to eliminate and idle issue. Ive done everything (except fix whatever is wrong) to figure it out. Ive done vaccum lines, new plugs, ect. Any ideas what the cause could be. Here is a vid of the idle. sometimes its worse that others. let me know if you cant hear it in the vid and ill get another. Thanks as always

http://www.youtube.com/watch?v=orLrvnKxGNY

 

Could be a vacuum leak, TPS out of spec/faulty, timing off, BAC being set poorly or faulty, some combination thereof or something else entirely. Check TPS, timing, and for vac leaks first though.

 

I did the tps about 1000 times. I did vaccum leaks but did not help, The only think i havnt done is timing. The Timing has never been messed with. Will the timing ever mess up on its own? Do i need a timing light to adjust? thanks

 

oh and I replaced the tps just incase. (well my dad did just before i got the car)

 

Man i just went through some major idle issues with my 88' GTU i did the same thing you did replaced all vacuum lines new plugs and all that i still have a little miss is that what your hearing in the vid thats what i hear im kind of stummped myself but some other things to look for that im doing right now myself are look for and refresh all grounds ,make sure plug wires have good flow and arent crossfiring you said there new but sometimes you never know other than that well im lookin for a solution myself you come up with anything let me know.