WHOOSH after shutoff?
#1
WHOOSH after shutoff?
Just remembered this..I always questioned it. On the 89...whenever I shut it off there was an audible koosh/woosh back through the intake. Air..reversing. What the heck was that all about? The L27 doesn't seem to do it, but the LN3 did it EVERY time.
#5
Senior Member
True Car Nut
Ours did that too on occasion. Would only happen if it failed to start. I always thought the motor was on a compression stroke, but didnt quite fire, so it kicked it back while another cylinder was on an intake stroke, and pushed air back through the intake. maybe i am wrong? :?
#6
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That Last breath you hear is usually the last of the vacume being pulled in after you shut the car off.. My 91 does it all the time at shutoff, if it didn't I would think something was wrong
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#8
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My 93 did it when I shut it off when it had high idle problems, or it would do that if I didnt start the car long enough and the ignition didnt catch.
I suspected that it was just the momentum giving the crankshaft one last extra stroke after ignition cut off, and the whooshing noise could be the air rushing through a narrowly-opened valve.
I suspected that it was just the momentum giving the crankshaft one last extra stroke after ignition cut off, and the whooshing noise could be the air rushing through a narrowly-opened valve.
#9
Yeah, I never thought anything was wrong, just always found it interesting. IIRC, it didn't really start getting noticeable until about a year after i got it...and then it just became downright loud If all the series can do it...yet some don't...what the heck is the difference thats making them do it? Because like a said..mine became noticeable, wasn't always there.