2003 CHEVY IMPALA

  • Tiny
  • jescobedo
  • 2003 Chevrolet Impala

Engine Performance problem
2003 Chevy Impala 6 cyl Two Wheel Drive Automatic

random missfires under light load. Plugs, wires, coils are all good

Do you
have the same problem?
Yes
No
Tuesday, August 4th, 2009 AT 8:59 AM

1 Reply

  • Tiny
  • lout5369
  • Member

Do you have the 3.8? I have had the plastic upper plenum get a hole in them on the inside at the throttlebody coolant passage, causing coolant to leak into the intake, Have the computer scanned for misfire codes, taking note which cylinders are misfiring. If it is the upper plenum causing this it will have to be replaced. Good Luck

Was this
answer
helpful?
Yes
No
Thursday, August 6th, 2009 AT 10:19 AM

Please login or register to post a reply.

Similar Questions