on the intake there are various ports ...these I refer to a source vaccum points because they provide vaccum to various components such as emissions controls, brake booster and pcv system.....with a can of carb cleaner spray all vaccum hoses slowly listening for a change in engine idle and spray all intake mating/gasket areas and egr calve and anything that carries vaccum..when idle changes you have found a leak..= fix it and look for the next if any exist

 

i never knew that. but its painfuly logical...[sm=headbang.gif]

 

why is it only hapenning in reverse?
can bad tranny mounts cut off the motor if the tranny moves too hard?

 

anybody?

 

?

 

CHECK ENGINE LIGHT

now why do you have to send your car in for that?

 

I'm not sure I understand your question.

I cleaned out the electronics on the throttle body and replaced the IAC but now It will idle fine until i put it into reverse in which the rps will drop low, either stall, or jump up and then start to surge from 900-1500 sometimes higher. and when I put it back into park it will continue to do the same thing.

The problem doesnt happen if I just leave it in park or drive. As soon as I put it in reverse it acts as it use to before the IAC replacement.

 

is there indeed a connection with my idle problem and my reverse gear?

I'm probably just going to replace all my vaccum lines and go from there.