weird lean problem...

[PRRedCelicaGT]

ok here is the problem... when i drive the car lets say for 40+ min and a come to a sudden stop..let say a red light... the car begins the lean out to the point of shaking, the wideband reads 16, 16.5, 16.8....after a few seconds the car idles ok...this only happens after a long drive at the first stop...after that I stop and go without the problem...

[Black_TRD]

find some one with a proper obdII scan tool and check long term fuel trim

[cool2miketlu]

You are using PowerFC? There is a 10/10/10 thing you have to do when you first start driving the car after install. If I were you reset your ECU then clean your MAF, after that then do this 10/10/10 thing.

[PRRedCelicaGT]

Im using emanage...
also i got a ckengine light after i removed the cat...could this be related?

[Smaay]

they might be related, but if you go lean at idle at a stop then dont worry about it...when i come to stops, the O2's bounce back and forth off the chart, lean, then rich, then lean, then it levels out...

[PRRedCelicaGT]

it levels out...but after a few seconds (+-10) and after scaring the hell out of me...this practically happens everyday when i drive to work and after a arrived at home...