91blackEF

ok guys its a weird question but i have a 98 coupe with a b18b1 swap and when im driving by myself the car feels fine pulls hard no problems but when i have a passenger no matter what the weight when im at like a stop light or stop sign and i have to take off in first gear the car feels so sluggish like its almost gunna stall i have a vafc so i can see my throttle % and normally to get up to speed im at roughly 14-16% throttle but when i have a passenger im at almost 30% to get moving i know im adding extrad weight but damn i dident think it would be that bad ne other reasons this could be happeneing ???

SweetDA9_TR

This is crazy (but it happened to me) back in the day when i was runnin VAFC..everytime some 1 rode w/ me same thing ur having happend...i found out it was b/c the passenger was resting there feet on the ecu....or somewhere near the wires..its crazy but it happend 2 me..mite wanna check that out...