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Qman · 09-20-2016, **(Subject: Truck running rough, no amber lites thu... )**

Truck run'n rough but no amber lites
Please look at attachments n tell me wht you think...

Rawze · 09-20-2016, **(Subject: Truck running rough, no amber lites thu... )**

looks like some fuel pressure issues to me. hard to tell with only those screens and very limited info.

Qman · 09-20-2016, **(Subject: Truck running rough, no amber lites thu... )**

Would it show like that if i had low fuel in truck at time of reading.

Dcolumbia · 09-21-2016, **(Subject: Truck running rough, no amber lites thu... )**

Fuel rail pressure too low. Exhaust temp looks a little high unless it's doing a regen. Isn't the fuel rail supposed to be around 270 280?

in2trux · 09-21-2016, **(Subject: Truck running rough, no amber lites thu... )**

(09-21-2016 )Dcolumbia Wrote: Fuel rail pressure too low. Exhaust temp looks a little high unless it's doing a regen. Isn't the fuel rail supposed to be around 270 280?

Yes and Yes.

Rawze · 09-21-2016, **(Subject: Truck running rough, no amber lites thu... )**

I just noticed in the last photo,... he is at 100% engine load with only 60 psi fo rail pressure (way too low, should be 260+) and he is also only getting 16-lbs of exhaust BP. This means about 12 psi of boost. It should be more like 36+ lbs, or 100+ inhg on the manifold.

That truck is in a serious derate.

Qman · 09-21-2016, **(Subject: Truck running rough, no amber lites thu... )**

In so many words yal are saying get to a shop ASAP!!!!!

Rawze · 09-21-2016, **(Subject: Truck running rough, no amber lites thu... )**

(09-21-2016 )Qman Wrote: In so many words yal are saying get to a shop ASAP!!!!!

Take it to Mr. Hag (atlanta), Unilevers (Indianna), or Gearhead (Maryland). They can get it sorted out.

Qman · 09-21-2016, **(Subject: Truck running rough, no amber lites thu... )**

One last question, will low fuel at time of reading cause the low pressure senor to be active?