really feel like pushing my car off a cliff....

[Goallie11]

Ah in that case no they wouldn't be hooked to anything. Judging from all your vacuum lines I thought you were stock.

[FlamboyantStealthTT]

a bad tps would trigger a check engine light wouldnt it??

[terrets]

Fuel filter may make it idle bad...Plugs...wires....fuel pump (if it doesnt run good on throttle). Not sure about these but I would change the filter, plugs, and wires anyways. And you said youve driven 40 miles since May? Bad gas a possibility?

[stealthee]

Not necessarily. If its out of spec the ECU may not know it.

[terrets]

Hey stealthee....can you download your knowledge to an external HD for me?

[RL7]

Did the tire pump you used for the boost leak test actually create any pressure? It's not of much use if it didn't. You should set your warm idle. If your car stalls when warm, the base idle may be set way too low and you could try backing out the BISS to help this. There is also the FIAV in the throttle body that raises idle when the coolant is cold. The FIAV can be damaged by cleaning and that would probably cause some odd behavior. You should probably unplug your maf and see if it runs any differently.

[stealthee]

His warm idle is fine. He needs to find the real cause of the issue.

[RL7]

Not necessarily, he said it only idled at 700 a month ago and hasn't idled right since. It could have been set to idle at 700 with a large vaccum leak. If he has fixed or lessened the leak since then, the idle could be set too low. I agree that this is probably not the real issue, but if he suspects this to be an idle issue it would be silly to not attempt the idle adjustment procedure first (including setting the tps) to at least get an idea of where you're at.