My o5 Dodge Ram 2500 with 5.9 Cummins is hydro locking. Fuel is the culprit. Injectors have been tested and are good. Any ideas?

Asked by Oct 05, 2016 at 12:42 AM about the 2005 Dodge Ram 2500

Question type: Maintenance & Repair

Injectors tested out good, and they only several years old. Engine will idle but
when you give any fuel it starts knocking then locks up.
Anybody out there have any ideas, as I live on an Island in Southeast Alaska
and the few mechanics here have no experiance with a problem of this sort
other than start replacing stuff till it is fixed.

5 Answers

The 2001 Cummings had a really bad problem with the transfer fuel pump going bad. It is the auxiliary pump that supplies fuel to the injection pump, and it is relatively cheap to replace. I think this will be a good place for you to start checking.

9,345

It's cheaper to buy a fuel pressure tester and check fuel pressure before u go throwing parts at it by guessing. If pressure is above 35psi, the problem is not fuel related, could be a plugged catalytic or no spark. Check each one at a time

The problem is the engine is getting to much fuel because the injector on my Cummins diesel is dumping excessive fuel into the cylinder and because of the high compression ratio will lock engine up because it will not compress the excessive fuel. And till compression is manually relieved,by turning the flywheel till valve opens will not turn over because of the hydro lock. Ideas?

hmm. not sure on that engine. but on some the injectors have to be synced to the computer. I had a similar problem and had to relearn the injector addresses. engine will start and idle but does crazy things when you rev it. I put a lab scope on the injectors and it showed up right away.

other than that I would look at fuel pressure and sensor values. You will need a good scanner to see things like high pressure fuel pressure. it is 1500 psi to start and 4000 to 23,000 psi. running...so be careful. Some engines are as high as 39,000 psi now.

Your Answer:

Ram 2500

Looking for a Used Ram 2500 in your area?

CarGurus has 4,825 nationwide Ram 2500 listings starting at $2,200.

ZIP:

Dodge Ram 2500 Experts

  • #1
    Dan Connell
    Reputation
    2,400
  • #2
    Ram2500Diesel
    Reputation
    720
  • #3
    AJBurns
    Reputation
    630
View All

Related Models For Sale

Used Dodge Ram 3500
79 Great Deals out of 2,074 listings starting at $4,990
Used Ford F-250 Super Duty
487 Great Deals out of 40,156 listings starting at $2,700
Used Chevrolet Silverado 2500HD
404 Great Deals out of 30,313 listings starting at $3,000
Used Dodge Ram 1500
326 Great Deals out of 9,355 listings starting at $1,995
Used GMC Sierra 2500HD
145 Great Deals out of 17,680 listings starting at $2,995
Used Ford F-350 Super Duty
349 Great Deals out of 23,248 listings starting at $3,249
Used Ford F-150
2,356 Great Deals out of 208,287 listings starting at $998
Used Chevrolet Silverado 1500
1,788 Great Deals out of 154,390 listings starting at $1,000
Used Chevrolet Silverado 2500
205 listings starting at $5,400
Used Toyota Tundra
449 Great Deals out of 39,425 listings starting at $2,800
Used GMC Sierra 1500
746 Great Deals out of 61,254 listings starting at $1,395

Used Cars For Sale

2010 Dodge Ram 2500 For Sale
12 Great Deals out of 314 listings starting at $9,990
2009 Dodge Ram 2500 For Sale
14 Great Deals out of 284 listings starting at $7,950
2008 Dodge Ram 2500 For Sale
26 Great Deals out of 566 listings starting at $7,897
2007 Dodge Ram 2500 For Sale
27 Great Deals out of 711 listings starting at $6,300
2006 Dodge Ram 2500 For Sale
28 Great Deals out of 1,055 listings starting at $5,099

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.