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Unable to Reset Diagnostic Codes 850 1993

posted by  KlausC on  Mon May 8 19:51 CST 2017
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

A failed fuel pressure regulator will cause hard cold starts and fouled spark plugs due to excessive fuel pressure.

The A6 2-1-4 code means that the computer doesn't know how fast you are going and won't know how much fuel you need to use.

The bucking could be due to dirty or badly work spark plugs. You have an EGR system which might not be closing completely due to dirt. Have you checked the rotor and cap?
--
Keeping it running is better than buying new






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