cylinder running lean
02-13-2016, 03:01 PM
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cylinder running lean
One of my cylinders is running lean. Car has 87000 miles on it. Changed my plugs about 800 miles ago. I noticed my passenger side rear plug was in bad shape when I swapped them. Checked the new plug the other day and it looked bad again. Any suggestions?
Last edited by dm3k; 02-13-2016 at 03:24 PM.
02-13-2016, 04:12 PM
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Car: 1988 Pontiac Firebird Formula
Engine: 5.7 TPI
Transmission: 700R4
Re: cylinder running lean
Is that from running lean, or is it burnt oil? (ash deposits) how are your valve seals?
02-15-2016, 08:47 AM
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Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: cylinder running lean
Nothing there to indicate lean.
Do the easiest first: change valve seals.
If it persists, then do as Orange says....intake gaskets.
Do the easiest first: change valve seals.
If it persists, then do as Orange says....intake gaskets.
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