73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: dumbucket1 on October 31, 2009, 03:38:14 pm

Title: Code 44
Post by: dumbucket1 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.

Title: Re: Code 44
Post by: VileZambonie 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

Title: Re: Code 44
Post by: dumbucket1 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.

Title: Re: Code 44
Post by: VileZambonie on November 01, 2009, 01:48:12 pm

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92699

Title: Re: Code 44
Post by: dumbucket1 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.