gtapexmickey
New member
So I have a 1989 narrow body GT4 that about a year ago suddenly wouldn't boost. I felt no specific change or anything happen. Just would not increase boost pressure. Gauge is working and reads vacuum fine. But absolutely no boost pressure. I jumped the gun on a kinegawa turbo because I wanted to upgrade anyway. Didn't solve the problem. I thoughtaybe the waste gate actuator or possibly the T-VSV, so I got the forge one that bypasses the vsv. Still no boost at all. I smoke tested to find a possible leak but I don't see anything. I spoke to a few people and they said it may have skipped a tooth in timing, but I'm not sure. Haven't done a compression test or popped the timing cover yet because it's a bit tight there. figured I'd make a post to see if anyone has any insight before I did.