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1997 Chevy Malibu

Tiny
RC4178
  • MEMBER
  • 1997 CHEVROLET MALIBU
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 124,123 MILES
The engine starts but runs rough, dies as the engine warms up and the ctalytic converter turns red. I have replaced all coils and catalytic converters no change. What could be wrong?
Wednesday, May 12th, 2010 AT 3:20 PM

1 Reply

Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
How long since a tune-up? Any applicable trouble codes? Use a gage and check fuel pressure, key on engine off, 41--47 psi. The pressure will drop some, when you start the vehicle. With engine off, see if pressure holds? If it drops like a rock, some possibilities, leaking injector/s-- fuel pressure regulator-- might be draining back through the pump? Some of the national brand autostores used to loan out a fuel pressure gage, if you don't have one.
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Wednesday, May 12th, 2010 AT 4:21 PM

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