2000 6.0L runs rough and stumbles - The 1947 - Present Chevrolet & GMC Truck Message Board Network

fxdxharley · 11-03-2009, 11:51 AM

well finally got around to replacing the plug wires. she runs a little better but still has the hesitation and little stumble. im thinking its fuel related now. IDK!

Going to pull the tb and clean it again and check the idle control valve to see if its sticking etc. any other ideas you guys can think of would be great.

clinebarger · 11-03-2009, 12:13 PM

Im guessing no check engine light? Like posted before the MAF can go bad and not set a light. EGR valve stuck part way open, Vacuum leaks, TPS sensor with a dead spot. If you do have bosch plugs throw them away there junk. Ive always ran NGK V-power plugs there cheap and a good plug never had a problem.

have you checked fuel pressure? Key on engine off 55-62 PSI.

fxdxharley · 11-03-2009, 01:56 PM

Quote:

Originally Posted by clinebarger

Im guessing no check engine light? Like posted before the MAF can go bad and not set a light. EGR valve stuck part way open, Vacuum leaks, TPS sensor with a dead spot. If you do have bosch plugs throw them away there junk. Ive always ran NGK V-power plugs there cheap and a good plug never had a problem.

have you checked fuel pressure? Key on engine off 55-62 PSI.

Nope no check light. I've unpluged both the maf and tps and ran it to see if there was a difference none noticed. i do have the bosh platums. How can i check to see if the egr valve is stuck? Never check feul pressure. I hope its good, the pump is only 2 yrs old.

heavychevy77 · 02-20-2012, 08:03 PM

I've got the same issues with hesitation and stumbling on my 2000 6.0. The fuel pump took a dive so I've already replaced that. I've put in a throttle position sensor, crank sensor,mass air sensor, and still falls on its face when you try to accelerate. I took it to a shop and had it plugged into a scanner that uses live feeds. It told me that 4 out of the 8 coils were missing under a load. I just ordered a set of 8. This truck has literally broke me lol
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heavychevy77 · 02-20-2012, 08:08 PM

I forgot to mention that I also did a fuel filter and regulator when I did the pump. Also, keep a good eye on the fuel filler neck. Apparently they're known for rotting out and the rust falls down in the tank along with the outside elements. It was a mess!
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11-03-2009, 11:51 AM	#1
fxdxharley Just a nother gear head Join Date: Jul 2009 Location: Barrington NH Posts: 501	Re: 2000 6.0L runs rough and stumbles well finally got around to replacing the plug wires. she runs a little better but still has the hesitation and little stumble. im thinking its fuel related now. IDK! Going to pull the tb and clean it again and check the idle control valve to see if its sticking etc. any other ideas you guys can think of would be great. __________________ 2013 HD FLHX 2000 chevy 2500 6.0l 4x4 3dr 2000 harley fxdx 71 Jimmy 4x4- future crawler/ woods rig 71 blazer (C4 2wd conv project) http://67-72chevytrucks.com/vboard/s...d.php?t=523589

11-03-2009, 12:13 PM	#2
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 2000 6.0L runs rough and stumbles Im guessing no check engine light? Like posted before the MAF can go bad and not set a light. EGR valve stuck part way open, Vacuum leaks, TPS sensor with a dead spot. If you do have bosch plugs throw them away there junk. Ive always ran NGK V-power plugs there cheap and a good plug never had a problem. have you checked fuel pressure? Key on engine off 55-62 PSI.

02-20-2012, 08:03 PM	#4
heavychevy77 Registered User Join Date: Feb 2012 Location: mansfield, ohio Posts: 4	Re: 2000 6.0L runs rough and stumbles I've got the same issues with hesitation and stumbling on my 2000 6.0. The fuel pump took a dive so I've already replaced that. I've put in a throttle position sensor, crank sensor,mass air sensor, and still falls on its face when you try to accelerate. I took it to a shop and had it plugged into a scanner that uses live feeds. It told me that 4 out of the 8 coils were missing under a load. I just ordered a set of 8. This truck has literally broke me lol Posted via Mobile Device Posted via Mobile Device

02-20-2012, 08:08 PM	#5
heavychevy77 Registered User Join Date: Feb 2012 Location: mansfield, ohio Posts: 4	Re: 2000 6.0L runs rough and stumbles I forgot to mention that I also did a fuel filter and regulator when I did the pump. Also, keep a good eye on the fuel filler neck. Apparently they're known for rotting out and the rust falls down in the tank along with the outside elements. It was a mess! Posted via Mobile Device

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