JERKING/ BUCKING in vacume. help!!!

MSP_4_CODY

Member
:
03 msp
so i did a t- belt on my car today, and when i went to drive it while cruising in vacume it jerks and stuff, every time it does it it spikes lean on my wide band.. i also just recently installed 440s in it, could it just be the ecu re-learning the 440s cause i had the battery disconnected... vacume is at 20 at idle, and wide band shows 14.7 at idle, no leaks... and when in boost its fine, i think cause the ssafc is taking over.. please help..
 
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