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Engine studder 850 1995

posted by  someone claiming to be Michael S. on  Mon Mar 14 03:41 CST 2005 [RELATED]

My '95 850 turbo has a chip, 3" dp and 2.5" cat back. I usually get 15psi. When I floor it it goes to 15 psi and then drops down to 10psi. The motor seems to studder like it is not building full power. The car seems to run rich, I'm thinking that an oil leak (burning oil maybe) is causing the car to missfire.

The CEL has no missfire codes. I am runnign spark plugs that are one step colder.

Any ideas on what is causing the studder?

-Michael S.








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Engine studder 850 1995

posted by  KlausC on  Mon Mar 14 08:53 CST 2005
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

If the engine stutters at high rpm, check your plugs. With a chip and 15psi, you need exotic plugs, not the Bosh single pole. Look at IPD.com.\
I have never known of an oil leak causing a misfire. Rich engine will backfire in the exhaust manifold, which means you need a better air cleaner.

Klaus
--
98 V70Rawd(101Kmi), 95 854T(85K mi), 75 164E(173K mi)








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Engine studder 850 1995

posted by  someone claiming to be Michael S. on  Tue Mar 15 08:41 CST 2005 [RELATED]

Klaus, I am using Autolite copper plugs that are one step colder. I installed them in the summer. I will check to see that my K&N doesn't need to be cleaned again.

Thanks,
Michael S.







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