1990 Chevy Lumina Sputters while cold

Tiny
LUMINAEURO9092
  • MEMBER
  • 1990 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 86,000 MILES
When I start my car when cold it runs rough like it's missing and sputtering. If I let the engine really warm up a good 20-30 min the rough idle and sputtering while accelerating goes away and the car sounds pretty good. Pretty much Only runs rough when cold. Usually. Replaced plugs and wires had the ignition module and fuel filter done a few months ago.
Tuesday, January 19th, 2010 AT 9:19 PM

1 Reply

Tiny
SCOTTY DEE
  • MECHANIC
  • 592 POSTS
The PCM may not be commanding enough fuel at cold startup. Possible engine coolant temperature malfunction, vacuum leak present only in cold, i.E. Warped intake manifold etc.
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Wednesday, January 27th, 2010 AT 3:48 PM

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