Mechanics

CHEVROLET CHEYENNE ENGINE PROBLEM

1991 Chevrolet Cheyenne • 160,000 miles

Looking For Service engine soon code 4.

specifically, shows loosing oil pressure down to a few lines under 40, starts up ruffly, and while in R, Over D, D and at a complete stop it wants to stall out with some "chugging"while in park or neutral it stays running.
while moving if the S.E.S light comes on going to neutral when possible for 10 secs give or take turns it off and when you return to Drive it runs normally, like it does 85% of the time Besides while at a COMPLETE stop and in a moving gear.

Thank you for your help, wish to come here more often when poor luck wins out, and a well made site.
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Philjobin
November 12, 2012.




Codes should be two digits so jumper between TREN a and B in ALDL count check engine flashes so flash, flash pause flash is 21
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Docfixit
Nov 12, 2012.
Hmm, the 1 2 1 2 1 2 to show its doing it is obvious I wonder why it puts them so close together for the actual code, TYvm


Tiny
Philjobin
Nov 14, 2012.

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