unkob

Just installed a Boost Up ROM Tuned ECU and now getting an idle hunt after the engine warms up to normal operating speed. Ran fine with stock unit. Any suggestions?

NeedFD

what was the ecu tuned for? if it's searching for (example) a midpipe and it finds a cat, it will throw off the a/f readings.

also is there a way to make the ecu relearn? basically reset it and let the car learn.

unkob

any special procedures on resetting the ECU to learn? This ECU was setup for use of the stock twin turbs, downpipe, midpipe & muffler and electronic boost controller. all to which I have, Thanks

extreme_rotary

the factory computer is reset simply by disconnecting the battery and holding your foot on the brake pedal for ten seconds. I'm not sure if that is going to work with a chipped ECU, but worth a shot never-the-less.
While it's warm, double check the fast idle cam on the intake plenum and verify that it has completely rolled off the throttle. That can cause it to hunt because it sees a zero throttle position, yet a high flow of air, and a warm engine. these computers are not smart, i could name another ten things that can cause an idle hunt, none of which include what kind of exhaust you have

1reven7

iTrader: (1)

I had the same problem with re amenyia ecu,the fix was simple there is a adjustment screw under the intake elbow.while the veh is hot and hunting adjust the screw until the hunting stops good luck