Boost Leaks

[Jacek]

Can a boost leak cause knock when you are driving in vacuum.

[TheBlizzard]

Is the car misfiring at all? If its misfiring it could cause the car to think its knocking but I wouldn't be worried about it actually knocking. Could be just vibration from misfiring.

CRAIG

[Jacek]

30-40 counts from 2500-3000 rpm. no misfiring. timing is anywhere from 30 degrees to 20 at higher knock. my o2 trim is running 95-105% in this area..

[Khadgar]

If it was a huge boost leak couldnt it be running really lean?

[Jacek]

my though would be rich.

[Khadgar]

No, ONLY if you are boostin will you be runing rich cause the metered air will be PUSHED out of the pipes, when you are in vacuum unmetered air is being PULLED through the leaks.

Or so I think

[Jacek]

makes sense

[Khadgar]

Im sure someone will let you borrow a wideband if you want.

[Jacek]

nobody has one down here where i am.

[Khadgar]

You in Iowa?

[Jacek]

winona

[Khadgar]

That like 2 hours south of here?, what you doing sunday?

[Jacek]

i dunno why i would need a wideband for that. im going to boost leak the system this weekend when i change my oil.

[Khadgar]

oh, i thought you were trying to tune for some reason

[Jacek]

i have tried tuning and the knock is insane. thats why i was asking my question

[Khadgar]

Well do a boost leak test yo.

[illz]

Originally posted by Jacek@Sep 3 2004, 11:16 AM
i have tried tuning and the knock is insane. thats why i was asking my question

go to home depot, build leak tester, answer own question

good work!

[illz]

Originally posted by Jacek@Sep 2 2004, 05:38 PM
Can a boost leak cause knock when you are driving in vacuum.

i wish we could drive in a vacuum. we'd be fast as shit

[Jacek]

go to home depot, build leak tester, answer own question

good work!

defeats the purpose of having this website doesnt it?

the only time i will be able to do a leak test is saturday, which i have the tester. so whats wrong with asking before hand?

[Khadgar]

Well mb if it ran lean enough it could, I dunno =/