jays97 t/a

iTrader: (2)

i just installed my new tranny and 3000 stall and for some reason when im at a stop light my car seems to idle weird.. its idling up and down acouple hundred rpms when im just sitting and the oil pressure needle is moving a lot also.. it seems like i have a cam in it but i dont... anyone kno what would be going on thanks

BubaGumpShrimp

iTrader: (1)

is it hunting for an idle speed meaning it might go to 1k rpm then fall to 500rpm then up to 800rpm then back to 500rpm when your coming to a stop. It should even out and settle to 550rpm or so(stock cam). If so you might need some tuning with the idle circuit.

performabuilt

iTrader: (25)

Since you just did work first I would recheck the work and all vacume lines towards rear of engine , But assuming a small diameter converter I have heard of a tuning issue and I am not sure at all because I am not a tuner but it has something to do with crank sensor relearn or calibration due to the lower weight of the converter.

Tom's_03SVT

it's because you have less rotating mass... you will get a couple of misfire codes too, Im sure. You need to bump your idle up to about 750 and your surging problem will go away.

jays97 t/a

iTrader: (2)

i have a pcm4less tune already so should i just send it back and tell them to bump my idle up to 750

Tom's_03SVT

yes...