Was changing fuel filters on '01. Removed old, drained bowl, install new with o-ring. Lightly fitted cover, bumped starter, lift pump runs (hums), but no fuel into bowl. Removed filter...same thing...no fuel entering bowl with pump humming.

I take it my lift pump is fried? Please comfirm.

 

Either that or you've got an air leak upstream of the pump

 

Any prior symptoms or indicators, or you think it just happened when you swapped the filter?

Just wondering. By the way,

GET A FUEL PRESSURE GAUGE.

 

Been running like a raped ape. No sypmtoms, check engine light or anything.

I'd have to say it's unlikely it went bad today, but hopefully not long ago. With zero flow though...yikes.

FWIW...I filled the bowl by hand, squished a new filter in, and she fired right away, then died. Cranked for about 20 seconds and she fired again and stayed lit.

 

all those mods and no gauges? I would get a lift pump and a fp gauge along with egt and boost.

 

Well...the good news. Installed replacement pump from Cummins. Primes proper now. Hopefully my injector pump didn't get stressed. Should I worry? She was getting enough fuel to blow a bit of black smoke when the hammer was down. These events were very brief and seldom.

Considered DC intank and FASS. Next time. Dealer wanted $1000 total (nearly $700 labor) plus I'd have to remove my cabover. Closest FASS dealer was out of stock. No free time for more extensive install. Need the truck for the holidays. I'll take another look when time is on my side.

Gauges don't add horsepower. If DC felt we should have gauges they would've put them on factory (just kidding).