squeak from engine when turned off?
Road Master
Joined: Oct 2007
Posts: 808
Likes: 1
From: so.jersey
RE: squeak from engine when turned off?
i have read something about this noise before
and i think the answer was there is something called
umbrella valves that make a noise simular to what your
describing .just a thought
and i think the answer was there is something called
umbrella valves that make a noise simular to what your
describing .just a thought
Elite HDF Member
Joined: Sep 2007
Posts: 4,468
Likes: 12
From: Bluffton, South Carolina
RE: squeak from engine when turned off?
We tracked down a "whistle" to the IAC opening a little as the engine shut down in an attempt to maintain idle speed. The air goes through it and whistles. You can change the pitch or even eliminate it for a while by cleaning the IAC with some intake cleaner.
Outstanding HDF Member
Joined: Sep 2007
Posts: 2,782
Likes: 7
From: NC
RE: squeak from engine when turned off?
mines sounds like popeye's pipe!...i'll go look it up but, what's an IAC?
found it--- IAC stands for Idle Air Control. It`s used to do exactly whatthe name implies.
The IAC should have no input on the popping. Normal IAC specs are 30 counts at idle hot/while stopped. AFR would be the leading factor when popping through the exhaust system is a concern. Run some real time data frames (record) andplay it back. Look at the data when the problem occurs and you should find your problem.
found it--- IAC stands for Idle Air Control. It`s used to do exactly whatthe name implies.
The IAC should have no input on the popping. Normal IAC specs are 30 counts at idle hot/while stopped. AFR would be the leading factor when popping through the exhaust system is a concern. Run some real time data frames (record) andplay it back. Look at the data when the problem occurs and you should find your problem.
Thread
Thread Starter
Forum
Replies
Last Post
