Hey I did an H22 J-spec motor swap into my eg a few months back. Ever since I have had TPS check engine light.
I can play around with the TPS and fast idle screw to get the engine to idle at about 900 RPM. However this will sometime change and the car will begin to idle very low, say 400RPM.
If the engine is left sitting for over 10hrs and is started up, it will fire right up and then RPM's will drop and then stall. Fire the car up again, runs fine then wait about 10sec's and the CEL comes on again.
I've tried 3 different TPS's all meter fine. If I set the TPS to the suggested resistance the car will idle at about 1500 RPM.
Only other issue with the car is that it may give vibration under heavy acceleration sometimes. But if you ease on the throttle to WOT no vibration. So, I'm thinking the issue might be related to an air fuel mapping problem since the ecu isn't reading everything properly yet (using jdm p13) quite right yet.
Also have no egr, cruise, or that prelude idle air box thing hooked up, have all those lines just plugged. Do have the IAB hooked up however and it works fine.
Any ideas would be greatly appreciated.
No matter what I do I can't get rid of the stupid TPS code.
I've been thinking of just getting it dyno tuned w/uber data and new air fuel maps. Don't know if this is a good idea or not though.

Please help me, driving me crazy.