Motor is clean, pretty fresh. I put on a new iacv (whatever the acronym is) on this morning after cleaning the old one with the same effect.

I have not done anything with the fitv (again whatever the acronym is) but Ive done the vacuum trick and there is only suction on the top hole before the throttle plate. Reason I am having this trouble is because the idle was surging between the standard 1000 and 1500. Well, I plugged the top hole before doing any replacements and by doing this the idle surging stopped and she idled nicely.

I am at my wits end with this car and I would really appreciate some input. Everything is tightened to my liking, hoses have been checked and there are no CEL.

 

As long as the iacv, fitv, and tps are all hooked up correctly, should be able to adjust and set the idle screw and be good.

 

just to be sure we are on the same page, car starts fine, immediately shoots to 5000rpm and wont back down at all for anything.

Adjusting the idle screw will really have that big of an effect?

 

forgot to mention, since replacing the iacv or whatever, i can plug the upper hole before the throttle plate and the idle will only drop 200 or so

 

If the screw is up a lot perching the throttle body open...then yes.

 

the idle screw is all the way in.

 

I am at a total loss here. Unplugged the damn iacv with a minor effect. unplugged the map sensor I assume (black sensor hanging off the throttle body, and messed with the vacuum return thing for the throttle plate.) which only got me a CEL......

There are only the iacv, the black sensor assuming its the map on the throttle body, teh vacuum thing for the throttle return I assume, and thats it! no other visible or otherwise hidden pieces to this puzzle.

 

I am done doing the reach around on the forum search and google as well. I do not have an fitv, do have an iacv, its fairly clean and i just installed it. Still starts and idles at 5000rpm.

What in the hell am i missisng! Ill get a few cans of carb cleaner and look for vac leaks.

Someone pleeeeaaasssseeee give me some info to look into. If i plug this hole i will get this reaction and so on. I need trouble shooting ideas guys....

 

So...what did you do with the idle screw? Did you play around with it at all?

 

Forget the idle screw...mess with that when you get the idle down. get a few cans of carb cleaner and spray the **** out the intake. You have a vaccum leak somewhere if it is at 5000rpms on startup. This happened on a buddys car and it turned out that the the intake manifold gasket was improperly installed. Do you have access to a smoke machine for evap and intake system leaks?

 

take off your intake, fire the car up and put your hand over the tb. it should stall, if not you have a big vac leak and you are getting air from somewhere else. check your brake booster tube and other ports on the back to see if you left something off

 

did you recalibrate the tps?

 

Is your throttle cable too tight?