502EFI Internal noise diagnosis...Listen

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08-17-2012 | 05:56 AM

#41

minxguy

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Joined: Oct 2005

Posts: 756

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From: New Hartford CT

If it is an exhaust flapper and the noise goes away when the #6 wire is removed, will the noise go away if another wire on the same bank is removed and #6 is left on?

Ken

08-17-2012 | 08:42 AM

#42

mike tkach

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Joined: Oct 2007

Posts: 8,439

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From: yorkville,il

i just listened again,it sounds like it is backfiring into the intake manifold,maybe a broken or very weak valve spring on cyl 6.

08-17-2012 | 09:17 AM

#43

4bus

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Joined: Jul 2007

Posts: 3,648

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From: Oneida Lake NY

Quote:

Originally Posted by mike tkach

i just listened again,it sounds like it is backfiring into the intake manifold,maybe a broken or very weak valve spring on cyl 6.

+100 that was my guess. The OP posted a thank you note......what did he find?

08-17-2012 | 01:51 PM

#44

mkramer

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Joined: Aug 2004

Posts: 1,842

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From: Cleveland, Ohio

Ok, here's what we found.........whipped out lifter, not sure on the valve or the cam still working on it........but we will change all at this point..........

Thanks again to everyone for their help......

mk