S2K_2003

Okay, so I acquired a OBX 72mm TB, I know I have heard some bad things about OBX, but I got it super cheap, so I figured I would give it a try. Besides it is an exact copy of a BDL TB.

So anyways I had a intake port matched to the TB. and it ran good, I set the TPS to the correct specs. the cars normal Idle was just a little under 1000 rpms, but that was at night in about 50 deg weather, so I drove it for about an hour in 80 deg weather, and I came to a stop and it was Idling at 3700 rpms. I couldn't figure it out. I went back to the shop checked the TPS and it was correct. .3v closed and 4.5v wide open. I have come to notice it occurs only after it gets hot.

Any Ideas anyone? the only one I am coming up with is the butter fly is expanding when it gets hot and is not making a good seal when closed.

camuman

check to see if the tb plate is getting stuck. is there an idle adjustment screw for the plate? does your car have strand alone?

flexer

There should be a adjustment screw. Since there is no change in ECU it must be a mechanical thing that is holding back the throttle from closing and letting the AIC do its thing.

rob-2

You might also need to re-learn the ECU. Pull battery for 20, and let idle until fan comes on twice with no accessories running.

Angerman

Had a similar problem. It sounds like a leak. Use a little RTV around gasket and mani n tb.