help me diagnois PO148

[machinemover]

dealer wants to charge me $300 for a diagnosis on this. I need help please. Symptoms are:

Pulling my 40' trailer up a 6% grade 3/4 throttle NO JUICE for more then 20 seconds engine light comes on, fueling problem.

Question is, how can I tell if this is a lift pump problem or a high pressure fueling problem. Is there an easy check before I go and buy a fass fueler or equivlent?

 

[Bodie]

Take a trip down to Harbor Freight and get a fuel presure gauge kit ($7) and test the presure to the pump. Try to find a banjo bolt with head tapped for a fitting($10).

 

[Bekim]

The dealer charge to diagnose this problem is $0! Your truck is under warranty for 100,000 miles for lift pump, injection pump, injectors... and everything else driveline related.
Take it in and let them figure it out.
Cheers
Mike
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[DSpears]

I had the same code and the dealer and I worked on it for 3 months before we found out what it was, turns out i had a really bad case of algea, but this may not be your problem, it could be lift pump or injection pump. Now heres the kicker the diesel tech had a refresher class to go too, so he took this info with him to the class and asked about, the very first thing the diesel school teacher said was that "the customer has a toy(chip/programmer) on the truck", tech told him i didnt, but i did do the bully dog try before you buy thing last july, the teacher and several other diesel techs still said that i had a toy on it, well long story short i traded the truck. So just watch out when you have the dealer try to figure it out.

 

[machinemover]

Here's the whole story. I took the truck in for a bad flywheel, when I picked it up it has a bad rubbing like abrasive noise when its cold it is very noticable. push in the clutch it goes away. I needed the truck so I couldn't leave it right then. Since then I developed the fuel problem, I brought the truck in, they "forgot" to replace the pilot bearing when they did the flywheel(which was not under warantee btw) so I am trying to make them drop this transmission put the pilot bearing in, find the abrasive sound and diagnois the fuel issue. Seems like they don't want to do any of it... ..... I would like to know. Is my lift pump under 100,000 warantee? I now have 97,000 miles on the truck and they don't like that either.