1999 Chevy Malibu fuel regulator

1999 CHEVROLET MALIBU
18,400 MILES • 4 CYL • 2WD • AUTOMATIC
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RICKTIPTON
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  • 1 POST
I HAVE CHANGED PLUGS AND WIRES, COILS AND COIL PAC, FUEL FILTER. THE CAR IS STILL SLUGISH AND WILL GO DEAD WHEN I LET OFF THE GAS. RUNS GREAT AS LONG AS I PUSH THE GAS. WHAT SHOULD BE MY NEXT STEP? CODE AT AUTO PARTS STORE IS MULTI PORT MISFIRE.
Jan 1, 2010 at 6:32 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel
Jan 1, 2010 at 6:52 PM
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