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2002 GMC Sierra

Tiny
JUDI SMITH
  • MEMBER
  • 2002 GMC SIERRA
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 13,000 MILES
When I press the accelerator it doesn't get any power. It started at about 50 mph and then drove at 20 mph and I thought it was going to completely quit. I pulled over and tried to rev the motor and made it about 1 1/2 miles to work at 20 mph. It has had a rough idle for a few months. When I would stop at a stop light it would die if I didn't apply both the brake and the gas during the stop. My truck has quadrasteer which probably doesn't make any difference but I thought I would mention it.
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Friday, June 27th, 2008 AT 7:49 PM

3 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
You need to have computer scanned for trouble codes, autozone does it for free, then get back to us
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Friday, June 27th, 2008 AT 8:13 PM
Tiny
JUDI SMITH
  • MEMBER
  • 2 POSTS
Checked trouble spots on machine. It said massive misfire right bank; left bank fires normal. Changed fuel filter, air filter, and installed new spark plugs. Exchanged injectors from right bank to left bank; right bank still mis-firing. Fuel pressure from fuel regulator to injectors 50 PSI. Truck has Vortex 6000, V-8 engine, 325 HP, SFI fuel injection.
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Saturday, June 28th, 2008 AT 3:42 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
... Just a note to add !

What we find in them 6.0L engine is that the intake manifold gasket fails allowing unmetered air to enter the cylinders causing a rough idle and misfiring codes
DTC p0300 and or so
check the intake manifold gasket and replace it with the new TEAL GREEN GASKET MATERIAL
hope that help
if not the gasket check for injector pulse
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Sunday, June 29th, 2008 AT 7:09 AM

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