G
Guest
·Hello
My 94 Supra sputters and sometimes backfires when i boost in second gear. Sometimes in first as well. Sometimes it does and sometimes it doesnt. If iam at stock boost its fine. But once i crank it up a lil bit it does it again. It never did this before when i used to boost 20psi. It started recently. I had NGK 3330 but i changed them and it still does. I have the HKS EVC IV controller. What could be the problem? Thanks
My 94 Supra sputters and sometimes backfires when i boost in second gear. Sometimes in first as well. Sometimes it does and sometimes it doesnt. If iam at stock boost its fine. But once i crank it up a lil bit it does it again. It never did this before when i used to boost 20psi. It started recently. I had NGK 3330 but i changed them and it still does. I have the HKS EVC IV controller. What could be the problem? Thanks