Crazy knocking sound when boosting
 

I finished pulling off my primaries and replacing the o-rings (too lazy to go get secondaries) as well as changing a couple vacuum lines. When boosting I heard a loud rattle/knock coming from the passenger of the engine bay.

After it happened I lost all boost. After RPM's dropped I had boost again. It happened every now and then. I think I probably left something loose...I have a feeling it's the CCA or y-pipe. I'll know for sure tomorrow when it's light...but if anyone has any ideas, or heard of anything like that (damn search) please do post

Bouncy Bouncy Bouncy. Sorry I love that sig.

I thought Asian females didn't have bulbous bouncing boobies? Ah, the wonders of modern science :).

YES they do, and modern science has nothing to do with it sometimes.

:cool:

Uh
 

Ok I know your an old pro but your not talking about detonation, right? Knock from passanger side under boost? Mine did that for a couple weeks before an apex seal broke. Comes and goes, like clear warm dry days? Mine would knock the most right after transition coming out of second and third.

I would hope to God it's not that. It sounds way too loud to be detonation. It's like a loud CLACK CLACK CLACK, like metal banging on metal

I'm gonna go check it now

That's what my secondary was doing, and then they fixed some things where the turbos were. You probably left something out or didn't connect all the way or something popped off. Cause that's what was happening to mine, and it went with the turbo, it's not detonation. Sounds like bearings kind of.

Modern hamburgers do ... but they still can't give them hips or ass.

*knock, knock*

Who's there?

I had a similar problem. No secondary boost. Loud thumping sound on attempted boost over 4500 rpm.

I had a vacuum line come off. It was behind the little black pressure chamber (in front of the intake manifold). Pull off the pressure chamber, and check the vacuum lines behind. Maybe you will get lucky, and not have a real problem.

exhaust...

exhaust who?

lol, nice try ;)

sorry I forgot about this :(

I sure am glad I tried to help on this one.

I still never solved the problem, but considering my wiring harness woes, i have a feeling that it was somehow related to that