Engine Performance problem
2003 GMC Yukon V8 Four Wheel Drive Automatic 139000 miles
My Yukon has a loss of power when pressing the gass pedal to the floor, while passing someone on the freeway. The truck does not want to go faster than 20-25mph. It behaves as though the engine is flooded. Waiting about five minutes or so will allow the truck to go again whith out a loss of power. This only occurs after wide open throttle. The check engine light comes on and shows the code for mass air flow sensor. I have cleaned sensor and it resolve problem for a short time only. I have replace the fuel pump and am leaning towards cleaning the intake manifold, thottle body and injectors to see if this may be causing some of the problems. Is there a possiblity the fuel pump is malfunctioning?
have the same problem?
Saturday, October 2nd, 2010 AT 12:27 PM