Why does your '91 S-10 run rough after it gets hot?

no try running a thicker oil so that it doesnt loose viscosity so quick. 1991's are motor driven oil puimps so if the oil is to think to pump it will run rough
Thanks for the feedback!

What causes a 94 Chevy S-10 4 cylinder to backfire and run rough and get poor gas mileage?

  This vehicle needs a tune up, new spark plugs, maybe new spark plug wires. It may be out of timing.   I would also add the plug wires may be installed incorrectly.
Thanks for the feedback!

Why does a car run at a normal temperature while running but gets hot while idling?

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91 ford aerostar 3.00 engine AT emission problems run rough?

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Why 91 350 Chevy gets a knock when oil gets hot?

when you oil gets hot it tends to thin out. Say your using 5w-30 and when the engine gets warm it knocks it means either the oil is to thin or oil is not getting to that compo (MORE)