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Author Topic: Code 44  (Read 3035 times)

Offline dumbucket1

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Code 44
« on: October 31, 2009, 03:38:14 pm »
87 silverado 5.7. My truck has a bog at around mid throttle and comes out of it if you mash the gas. I put a new oxygen sensor with no change. Truck runs great if you unplug the map sensor. Could it be low fuel pressure? Any other ideas? Code 44 is the only one set.
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Chevy and GMC trucks ranging from 1973 to 2007

Offline VileZambonie

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Re: Code 44
« Reply #1 on: October 31, 2009, 04:14:08 pm »
Look for anything that could cause a lean condition

Vacuum leaks, tbi base gasket is very common.

low fuel pressure, restricted fuel line, faulty injector

faulty sensor input
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Offline dumbucket1

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Re: Code 44
« Reply #2 on: November 01, 2009, 12:01:06 pm »
Everything seems to check out except I don't have a way to check fuel pressure. A fuel pressure gauge costs half as much as a new pump so I'm just going to change it out.
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Chevy and GMC trucks ranging from 1973 to 2007

Offline VileZambonie

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Re: Code 44
« Reply #3 on: November 01, 2009, 01:48:12 pm »
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,                           ___ 
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              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline dumbucket1

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Re: Code 44
« Reply #4 on: November 01, 2009, 06:10:40 pm »
Anyone that may be interested the little rubber piece of fuel line inside the fuel tank had a split in it causing the lean condition. I could have just replaced that piece of rubber and problem solved but since the tank was down I put a new delphi pump in it for piece of mind.
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Chevy and GMC trucks ranging from 1973 to 2007
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