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Hard starting when cold outside or raining

Tiny
JEFF CLEMENTS
  • MEMBER
  • 1998 CHEVROLET MONTE CARLO
  • 3.1L
  • 6 CYL
  • 250,000 MILES
When cold or raining car stumbles, erratic idle until it warms up then runs fine.
Friday, December 14th, 2018 AT 9:22 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

How old are the plugs and wires? If they are old, they may have cracks in them and when it rains, the electric will arc out of the wire instead of to the plugs.

The ignition module could be the issue as well as that spark is made in this unit.

There is a coolant sensor by the thermostat housing that controls cold start and hot start enrichment. This could also be the cause.

Roy
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Friday, December 14th, 2018 AT 10:09 AM
Tiny
JEFF CLEMENTS
  • MEMBER
  • 2 POSTS
Thank you, I will check them and let you know.
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Friday, December 14th, 2018 AT 10:48 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like a plan.

We will be here for you.

Roy
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Friday, December 14th, 2018 AT 10:48 AM

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