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

12,735

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 out of 1 people think this is 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 out of 3 people think this is helpful.
64,965

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 out of 1 people think this is 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 out of 1 people think this is helpful.
33,365

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.

33,365

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

Add photo

Related Questions

Silverado 2500HD

Looking for a Used Silverado 2500HD in your area?

CarGurus has 26,883 nationwide Silverado 2500HD listings starting at $1,250.

ZIP:

Search Chevrolet Silverado 2500HD Questions

Chevrolet Silverado 2500HD Experts

#1 Steven Loeffler
Steven Loeffler
Reputation 460
#2 Tom Demyan
Tom Demyan
Reputation 270
#3 piocon
piocon
Reputation 260
View All

Related Models For Sale

Used GMC Sierra 2500HD
111 Great Deals out of 14,597 listings starting at $2,650
Used Ford F-250 Super Duty
354 Great Deals out of 47,663 listings starting at $1,795
Used Chevrolet Silverado 1500
1,755 Great Deals out of 167,461 listings starting at $1,800
Used Dodge Ram 2500
146 Great Deals out of 5,301 listings starting at $2,500
Used GMC Sierra 1500
830 Great Deals out of 66,315 listings starting at $1,995
Used Ford F-150
2,237 Great Deals out of 209,413 listings starting at $1,499
Used Ford F-350 Super Duty
374 Great Deals out of 26,875 listings starting at $3,000
Used Chevrolet Silverado 2500
8 Great Deals out of 289 listings starting at $3,000
Used Chevrolet Silverado 1500HD
13 Great Deals out of 269 listings starting at $3,950
Used Toyota Tundra
476 Great Deals out of 33,278 listings starting at $3,305
Used Dodge Ram 3500
78 Great Deals out of 2,133 listings starting at $5,250

Used Cars For Sale

2017 Chevrolet Silverado 2500HD For Sale
14,736 listings starting at $25,191
2016 Chevrolet Silverado 2500HD For Sale
27 Great Deals out of 2,646 listings starting at $25,900
2015 Chevrolet Silverado 2500HD For Sale
35 Great Deals out of 1,875 listings starting at $18,500
2014 Chevrolet Silverado 2500HD For Sale
10 Great Deals out of 513 listings starting at $10,377
2013 Chevrolet Silverado 2500HD For Sale
5 Great Deals out of 959 listings starting at $7,200