Starting problem in cold weather?
Asked by mijobcfd 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.
5 Answers
aztec626bf answered 11 years ago
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.
xaviunited answered 11 years ago
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!
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.
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.
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.
