Hey, my car seems to be running pretty fine, but the Idle seems a bit low. When I start it, it fast idles to about 1k or so, then drops down to 700 in Park. When I switch to Neutral, Reverse, or Drive it sinks down to 500-550. It stays steady but all the same it seems rather low. This happens when I first turn the car on, and even after its been driving for some time and warmed up.

 

assuming the GTA is still TPI then I have no idea. When TBI does that all you can do is make sure you have fresh filters and good pressure. Check for codes, then check the TPI boards.

 

my 305 tpi idels like that

 

Yeah its a TPI, and ive got no codes.

 

An idle of 500 rpm sounds about right. When you start the car it should idle higher until it warms up a little.