Starting problem in cold weather?

10

Asked by Jan 01, 2013 at 07:30 PM about the 2003 Chevrolet Silverado 2500HD 4 Dr LT 4WD Crew Cab SB HD

Question type: Maintenance & Repair

I have 03 Silverado HD. I'm having a hard time starting my truck in cold weather. When I start my truck it runs fine for around 4-5 minutes, than it starts missing and sometimes stalls. When I get the RPMs higher and it warms up it's fine. After it warms up the truck runs fine. I have replaced spark plugs, plug wires, fuel filter, and air filter. This only happens in cold weather. The check ingine light starts blinking when it starts to miss and the code reads a mis fire. But once the truck warms up the code goes away. Could it be a bad coil pack or maybe a plugged injector. Thanks.

6 Answers

13,855

I think you are on track suspecting a coil. When they start to break down temperature really can make a difference in how they fail.

1 people found this helpful.
35

I believe also Aztec is on track with the coil pack going bad..this causes 'missfire' codes often. If it is plugged injectors, I'd suggest trying out some additives perhaps it will help get rid of old grimes. You never know, it could be just that simple. Give it a try and let us know!

3 people found this helpful.
78,175

Since you can "blow it out" and it'll run fine sounds like it's dumping fuel. In other words an overly rich air/fuel mixture. Be careful of that flashing check engine light. It's warning you that the catalytic converter is being damaged by the misfiring. In the old days cars would develop the same symptoms if the automatic choke would stick. Check your coolant temperature sensor. It may have lost it's calibration so the computer thinks the engine is still cold & keeps the air/fuel mixture too rich too long. HTH. -Jim

1 people found this helpful.
10

I have added injector cleaners to the last three fuel fill ups and it's still the same. I'm thinking that its one of the coil packs. Now I have to try and figure out which one. thanks guys for the help I appreciate it.

1 people found this helpful.
36,805

Idle air control gets gummed up with carbon and gets stuck wherever its at. Really simple to remove and clean with brake cleaner or Carb cleaner.

36,805

Pull the codes, P0300 isn't a coil, it will be a lean or rich issue, possibly cause by fuel pressure, vacuum leak, or sticking idle air control. P0301- P0308 are cylinder specific and would be more likely caused by a cylinder specific component like a coil.

Your Answer

Silverado 2500HD

Looking for a Used Silverado 2500HD in your area?

CarGurus has 29,654 nationwide Silverado 2500HD listings starting at $2,000.

ZIP:

Chevrolet Silverado 2500HD Experts

  • #1
    Steven Loeffler
    Reputation
    540
  • #2
    Tom Demyan
    Reputation
    370
  • #3
    Matthew Wagner
    Reputation
    330
View All

Related Models For Sale

Used GMC Sierra 2500HD
135 Great Deals out of 15,708 listings starting at $4,395
Used Ford F-250 Super Duty
370 Great Deals out of 41,892 listings starting at $1,600
Used Chevrolet Silverado 1500
1,805 Great Deals out of 150,166 listings starting at $1,495
Used Dodge Ram 2500
142 Great Deals out of 4,949 listings starting at $2,495
Used GMC Sierra 1500
725 Great Deals out of 59,132 listings starting at $1,995
Used Ford F-350 Super Duty
405 Great Deals out of 24,309 listings starting at $2,495
Used Ford F-150
2,339 Great Deals out of 215,873 listings starting at $1,300
Used Chevrolet Silverado 2500
203 listings starting at $4,495
Used Toyota Tundra
479 Great Deals out of 39,021 listings starting at $1,999

Used Cars For Sale

2018 Chevrolet Silverado 2500HD For Sale
16,707 listings starting at $25,373
2017 Chevrolet Silverado 2500HD For Sale
38 Great Deals out of 1,725 listings starting at $26,869
2016 Chevrolet Silverado 2500HD For Sale
60 Great Deals out of 1,665 listings starting at $25,900
2015 Chevrolet Silverado 2500HD For Sale
69 Great Deals out of 2,246 listings starting at $10,995
2014 Chevrolet Silverado 2500HD For Sale
9 Great Deals out of 588 listings starting at $8,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.