5.9 cummings 12v question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**richard2717** · 09-04-2023, 02:29 PM

guys
I have a 96 5.9 12 valve in a ferd work truck. Truck has sat since beginning of 2020 but ran and drove great when I set it up. It had been started and drove around the yard at least once a month since. I needed it the other day on a job a couple miles from the shop so I fired it up and away we went. Engine idles fine and revs up fine with no load but going thru the gears seems to lose all power and the most I could get out of it was about 25 mph which was still a struggle. Never once tried to shut off just has no power. Drove it back to the shop with same conditions happening. Any ideas what I should be looking for? would the fuel be going bad? Going over it smoked black smoke like crazy coming back was not as bad but you could definitely smell the raw fuel.

Thanks
Richard

09-04-2023, 02:29 PM	#1
richard2717 Equal opportunity joke ofender Join Date: Oct 2011 Location: Eastern Shore of MD Posts: 10,099	5.9 cummings 12v question guys I have a 96 5.9 12 valve in a ferd work truck. Truck has sat since beginning of 2020 but ran and drove great when I set it up. It had been started and drove around the yard at least once a month since. I needed it the other day on a job a couple miles from the shop so I fired it up and away we went. Engine idles fine and revs up fine with no load but going thru the gears seems to lose all power and the most I could get out of it was about 25 mph which was still a struggle. Never once tried to shut off just has no power. Drove it back to the shop with same conditions happening. Any ideas what I should be looking for? would the fuel be going bad? Going over it smoked black smoke like crazy coming back was not as bad but you could definitely smell the raw fuel. Thanks Richard __________________ Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type.



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