2000 6.0L runs rough and stumbles

[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.

[fxdxharley]

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]

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]

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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