2001 2500HD 6.0L 4x4 Power Issue - Lean Fuel

nicholwa · 01-30-2007, 07:03 AM

I have a 25% lean fuel reading on the left injector bank of my 6.0 L engine. It happens at about 40 - 60 mph on road driving. I have changed fuel pump, fuel filter, plugs, wires, air filter, O2 sensors, checked injector pump and pressure. Didn't solve the problem. Swapped the left bank injectors with the right bank to see if injectors are the problem but problem stayed on left bank so injectors are fine. The computer is throwing no codes.

Any thoughts on what else I may be missing.

Thanks
Anthony

bradrhale · 02-01-2007, 11:48 AM

a problem with the computer.

chadwickthomas · 10-28-2009, 01:30 AM

All the lean fuel conditions i have ever dealt with was from a vacuum leak of some sort.check all hoses carefully,take some ether and spray a light mist along each side of your intake manifold,along the base of your throttle body or carburator any other place that can suck air. Make sure your pvc valve is not letting to much air bypass.test egr valve and make sure that pendelum is sealing also check egr gasket and be sure it is not burnt between the two ports and is tight.last thing i can think of if you have power brake booster be sure you dont have a ruptured diaphram sucking excessive vacuum.also any vacuum hosing going to cab for ac and heat controls.when you find the leak it should correct your lean condition.

leolkfrm · 10-28-2009, 04:31 AM

checked injector pump and pressure, Hmmmmm?? duel fuel engine?
Sorry had to, as sometimes we do on this forum
what was the fuel pressure?
is the lean condition reading off a scanner during a drive cycle or sitting?
check the voltage reading on the left bank injecters for variation and confirm the fuse for the left bank is clean

mudseeker · 10-28-2009, 05:15 AM

leo, date?

bradrhale · 10-28-2009, 06:49 AM

that is the second time this week. i believe leo is making a comeback.

01-30-2007, 07:03 AM	#1
nicholwa Junior Member Join Date: Jan 2007 Posts: 1	2001 2500HD 6.0L 4x4 Power Issue - Lean Fuel I have a 25% lean fuel reading on the left injector bank of my 6.0 L engine. It happens at about 40 - 60 mph on road driving. I have changed fuel pump, fuel filter, plugs, wires, air filter, O2 sensors, checked injector pump and pressure. Didn't solve the problem. Swapped the left bank injectors with the right bank to see if injectors are the problem but problem stayed on left bank so injectors are fine. The computer is throwing no codes. Any thoughts on what else I may be missing. Thanks Anthony

10-28-2009, 04:31 AM	#4
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	checked injector pump and pressure, Hmmmmm?? duel fuel engine? Sorry had to, as sometimes we do on this forum what was the fuel pressure? is the lean condition reading off a scanner during a drive cycle or sitting? check the voltage reading on the left bank injecters for variation and confirm the fuse for the left bank is clean __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

10-28-2009, 05:15 AM	#5
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,373	leo, date? __________________ i'd rather be hunting

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02-01-2007, 11:48 AM	#2
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,021	a problem with the computer.

10-28-2009, 01:30 AM	#3
chadwickthomas Junior Member Join Date: Oct 2009 Posts: 11	All the lean fuel conditions i have ever dealt with was from a vacuum leak of some sort.check all hoses carefully,take some ether and spray a light mist along each side of your intake manifold,along the base of your throttle body or carburator any other place that can suck air. Make sure your pvc valve is not letting to much air bypass.test egr valve and make sure that pendelum is sealing also check egr gasket and be sure it is not burnt between the two ports and is tight.last thing i can think of if you have power brake booster be sure you dont have a ruptured diaphram sucking excessive vacuum.also any vacuum hosing going to cab for ac and heat controls.when you find the leak it should correct your lean condition.

10-28-2009, 06:49 AM	#6
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,021	that is the second time this week. i believe leo is making a comeback.