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Old Nov 6, 2006 | 11:59 AM
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GaRn
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Default Re: 93 coupe boost problem

Originally Posted by spider228
ive got a y7 in my coupe and just upgraded to a t3/t4 turbo with ex. wastegate from a t25/ internal gate. i got an 8.6lb spring and everytime the wastegate opens up a 8lbs the car starts to missfire. i can hold half pedal at 5lbs and it wont missfire. it only happens when the gate opens up when im full pedal. im so confussed.
Check spark plug gap.. get a one step colder plug compared to OEM's and gap to .030