2004 379, c14 cat .mbn....ecm redone,,borg warner turbo..1.7 mill miles.fuel mileage way done,truck runs sluggish..when i run west tx,nm and Az truck smokes more when i change gears..I thought it was the cac..just got it checked all good..but putting a new one on..12 years old..turbo seems slow on spooling up...
I'm at a stand still on what to check next....
poor mileage,black smoke
Discussion in 'Peterbilt Forum' started by Sodapop, Jun 2, 2022.
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Another Canadian driver, pumpkinishere and baha Thank this.
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Have you been to a cat shop and had the injectors ck. May have 1 or more over fueling?
Another Canadian driver and pumpkinishere Thank this. -
Another Canadian driver and pumpkinishere Thank this.
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Sadly most dealers are clueless if everything hasn't been left in stock form.
OLDSKOOLERnWV, Another Canadian driver and pumpkinishere Thank this. -
Do any of you use that additive you put in the fuel to help keep injectors clean?
Another Canadian driver Thanks this. -
We haven’t used it on our truck but was wondering if maybe we should. We have a 2016 Pete.
Another Canadian driver Thanks this. -
As for the original post, check turbo and piping for leaks. Changed air filters or fuel filters? And cat refusing to look at it because it's been altered? What a crock of poo. A different turbo and tune on a pre emissions engine gimme a fricking break, procedure is still the same. That really ticks me off. I could understand if it was an emissions motor that had been deleted but a 18 year old pre emissions come onAnother Canadian driver Thanks this. -
I like my cat engine but absolutely despise cat dealers
Another Canadian driver Thanks this. -
O yea a slightly clogged air cleaner can make a lot of smoke, charging it out with a new one is 1st step?
Another Canadian driver Thanks this.
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