1989 GMC C1500 No power

1989 GMC C1500
172,000 MILES • 6 CYL • 4WD • MANUAL
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FAZ123
  • MEMBER
  • 2 POSTS
My GMC seems to not be getting enough fuel. On my drive home from work, it simply had no power. I would top out at 10mph driving up a steep incline. If I would leave off the gas at a stop light, then it would stall. I was thinking clogged fuel filter, but I'm far from an expert. Please help? If it is the fuel filter in your opinioin, do you have any tips for changing it?
May 16, 2008 at 10:52 AM
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MASTERTECHTIM
  • ✓Experienced Mechanic
  • 4,750 POSTS
a fuel filter is a start. spray with wd40 before attempting to remove the fuel lines to the filter.
May 16, 2008 at 11:04 AM
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FAZ123
  • MEMBER
  • 2 POSTS
If that doesn't work?
May 16, 2008 at 1:49 PM
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MASTERTECHTIM
  • ✓Experienced Mechanic
  • 4,750 POSTS
you need to install a fuel pressure gauge and check pressure. it should be betwenn 9 and 13 psi. also try removing the o2 sensor(you could have a clogged cat converter) this will relieve the back pressure so if it runs ok with it out then you know the cat is cloggeed
May 16, 2008 at 11:24 PM
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