Fuel pressure and restriction test

[Lonestar10]

well you didnt have vacuum if you took the reading while the elec pump was running it puts out about 10-20psi

[DDlighttruck]

Cummins didn’t bring that up in the instructions

I guess they assumed idiots weren’t going to be attempting them

[Lonestar10]

best way to do any test is start engine let run for a bit so everythings all evened out then do tests that require engine running.

[DDlighttruck]

(12-07-2019 )Lonestar10 Wrote:  best way to do any test is start engine let run for a bit so everythings all evened out then do tests that require engine running.

   

The truck was warm by the time I got to the shop. I let it run for 20 minutes or so, then tried it again today. It’s still showing pressure there, 3-4 psi

So I don’t know. Maybe another shop has one I can use to double check what I’m seeing