T- Type Tim
Vice Chairman
- Joined
- Jul 8, 2001
- Messages
- 2,158
Who has seen false knock caused from a header exhaust leak?
I saw 20+ degrees of retard at 15 psi just taking the car for a quick drive. Prior drives in the car I would see zero knock at 20 psi with the same fuel. Was fairly certain I had a false knock issue here.
I found the # 6 header bolts loose with an audible leak when I got home. Turns out it was the culprit . I have checked the header bolts numerous times through a number of heat cycles, but I will be keeping a closer eye on them now.
Hope this helps some of you fellas chasing a false knock.
Posted from the TurboBuick.Com mobile app
I saw 20+ degrees of retard at 15 psi just taking the car for a quick drive. Prior drives in the car I would see zero knock at 20 psi with the same fuel. Was fairly certain I had a false knock issue here.
I found the # 6 header bolts loose with an audible leak when I got home. Turns out it was the culprit . I have checked the header bolts numerous times through a number of heat cycles, but I will be keeping a closer eye on them now.
Hope this helps some of you fellas chasing a false knock.
Posted from the TurboBuick.Com mobile app