Whenever my engine is warm but the car has been turned off, and then I turn it back on it revs up to like 1500rpms or higher for a minute or two. I've noticed that if I pulled the accelerator pedal up when it is doing that the rpms drop down to 800 where they are supposed to be. I guess something is in need of adjustment. What could it be?

 

it could be a frayed or sticky throttle cable...

 

What engine, or dual point or multi point injection?

 

D15B2 Engine

 

the return spring in your throttle body has given out. You can stretch it back, but its a bitch to reassemble the throttle rotor assembly, and you might be better off just buying a new (used) throttle body. You should be able to find one in a junkyard for less than a hundred bucks. By the way, the zc and d16a6 throttle bodies are the same, although the choke switch is different, that only takes thirty seconds to change.

 

I found the solution.

When I installed my Neuspeed Strut Bar I had to move this bracket where the throttle cable kind of clipped to, well with the bar on I had to move this and it must have pinched or pushed the wire to far which made for about a 800 rpm difference. But I just unclipped it and now it is fine. Good Times.