HAVE YOU CHECKED THE POSSIBILITY OF FUEL CONTAMINATION/WATER IN FUEL?. OR PERHAPS A SENSOR UNPLUGGED SOMEWHERE ON THE ENGINE. HOPE THIS HELPS. PLEASE LET ME KNOW. THANK YOU FOR USING FIX-YA. AND THANK YOU IN ADVANCE FOR AN HONEST RATING.
Check the throttle... If i am not mistaken it could be an electronic instead of cable operated. Check pedal rheostat and possible throttle motor.
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spark plugs are ok and no air problems. Was thinking it may be the fuel pressure regulator?
Do pedal rheostat or throttle motor account for low and rough idling?
Fuel is OK. Could be a sensor unpluged i suppose,,,but where to start. OBD II shows no codes.
is air entering the system where it shouldn't?
are all spark plugs firing cleanly?
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