1990 Chevy Truck fuel delivery

1990 CHEVROLET TRUCK
189,000 MILES • V8 • 2WD • AUTOMATIC
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ANDYCLINE
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  • 2 POSTS
Gas is not getting to the throttle body but its coming out of the fuel pump and fuel filter, do you think its the fuel line? its not comin out of the gas line behind the throttle body.
Aug 24, 2009 at 3:45 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Hello, I'd use a gage and check fuel pressure. Sometimes it is easier for me to tee in right there at the fuel filter, in place of the fuel filter. If it is easier under the hood, do it there. I'm an old man I get tired quick trying to stay squatted under the hood.

I guess you can unplug the supply line at both ends, see if you blow air throw it?
Aug 24, 2009 at 3:58 PM
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ANDYCLINE
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  • 2 POSTS
i could barely blow through the line but i saw the pressure of gas from the fuel filter
Aug 24, 2009 at 4:31 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Hi, I can't judge fuel pressure by looking at it. I've seen injector spray patterns that looked good to me, but, after using a pressure gage, the pressure was half of what it should have been.

Maybe the supply line is clogged? The autostore may sell the fuel line in straight lengths, you may need a tubing bender. Be careful taking the old line off, you may need it for a pattern.
Aug 25, 2009 at 9:09 AM
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