Mechanics

DODGE RAMCHARGER ENGINE PROBLEM

1990 Dodge Ramcharger

Engine Mechanical problem
1990 Dodge Ramcharger V8 Two Wheel Drive Automatic 14000 miles

Hi I have a 90 dodge ramcharger. The problem I am having is that after driving for aboute ten minutes when you come to a stop the oil light comes on and the truck wants to die. Then it runs like crap. I have putt a new air fillter in it new valve cover gaskets new cap rotor wires spark plugs changed the oil every 3000 miles and a new fuel fillter and I am still having this problem.
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Jake_ramcharger90
February 8, 2010.



Remind me, does this vehicle still use a carburetor or does it have fuel injection?

If it's carbureted, the exhaust passage that goes through the intake manifold under the choke spring and carburetor base could be plugged with carbon. This was real common in the 1970s when gas wasn't so clean.

Is the 10 minutes the issue or coming to a stop? If it would run fine for longer periods at highway speed, you might check for an EGR valve stuck open. You won't notice the valve opening at highway speeds, but it should never open when you're idling. A chip of carbon can hold the valve open, or carbon buildup on the shaft of the valve could prevent it from closing. If this is the problem, holding the gas pedal down a little will prevent the engine from stalling but it will still have a rough idle.

Most likely the oil waning light isn't a clue to the problem, just a result of low engine speed.

If you have fuel injection, was the battery recently disconnected or run dead? If it was, you will need to relearn " minimum throttle" before the engine computer will know when it must be in control of idle speed. The engine will stall until that is done unless you hold the gas pedal down 1/8" but this doesn't cause a rough running engine. Simply drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the brake or gas pedals.

Caradiodoc

Caradiodoc
Feb 9, 2010.