BigMikeATL

I recently replaced my old stock battery with a new Optima Yellow Top. I went through the ECU reset procedure twice and am still having trouble with the car finding idle and stalling when coming to a stop.

I think there may be a throttle position sensor issue as it seems like I need to apply more pressure to the pedal to get the desired result.

Any idea why a battery swap would cause this?

Anyone have suggestions to troubleshoot/fix the issue?

Thanks,
Mike

RX8Soldier

iTrader: (24)

your fuel trims need to be relearned.

Give it about 5 or 6 drive cycles, and you should be fine

GotBass

I just posted about this in another thread. I've been having the same problem for a few years. Happens every time I disconnect the battery. It usually takes a couple of days to reset itself and is fine, but this time I'm on day 10 and the car still dies at idle.

RX8Soldier

iTrader: (24)

when was the last time you changed the plugs and coils? Is your air filter and MAF sensor clean?

ShinkaEvo

iTrader: (3)

Last time it took me more than a week for the ECU to relearn the fuel trim.
And somehow it's idling smoother than before I disconnect the batter....go figure...

BigMikeATL

Ok. I think it has been resolved. I disconnected the battery, cleaned the MAF and throttle body, did the ECU reset, and let the car idle for awhile. It seems to be about 80-90% back to normal.

I will drive it some more this weekend and let you know how things progress.

Thanks!

painoracing

Hi!!! Which one of the ECU Reset procedures you used?

Tks.