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1989 GMC C1500 No power

Tiny
FAZ123
  • MEMBER
  • 1989 GMC C1500
  • 6 CYL
  • 4WD
  • MANUAL
  • 172,000 MILES
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?
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Friday, May 16th, 2008 AT 5:52 PM

3 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
A fuel filter is a start. Spray with wd40 before attempting to remove the fuel lines to the filter.
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Friday, May 16th, 2008 AT 6:04 PM
Tiny
FAZ123
  • MEMBER
  • 2 POSTS
If that doesn't work?
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Friday, May 16th, 2008 AT 8:49 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 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
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Saturday, May 17th, 2008 AT 6:24 AM

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