okay so check it out, I have a 94 GSR with a 00 USDM b16a2 swap, the wiring harness is still for obd1 therfor I got a 94 B16 P30 ECU wired in I've tried my friend austins and now I have this one but my idle is bouncy... it steadily goes up and down from 1k to 1.5k and then eventually itll die down to 850 and stay steady but once I go again and stop its back to revving up and down

 

try adjusting the iac valve on the throttle body

 

Burp the system too... I did mine, and it quit doing it. I don't know why..

*edit this is supra8215*

 

thats because coolant runs through the iac thats located on the throttle body. could be the air pockets or it needs some adjustment. you have to remove the little end cover to do that though

 

yeah this idiot had a leaky heater core.

 

his cars interior was flooded with the wonderfully green antifreeze...and when i say flloded...i mean flooded. the radiator had emptied itslef complety inside his car 3 TIMES!!

 

HAHAHAHAHAHAHAHA

 

haha it wasnt the heatercore, and yes i had 3 radiator/over flow tanks full in my car, but that had nothing to do with the idle

 

This happens with my car every now and then. Hasn't done it in like 2 weeks.. So I don't care. =P