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.

7,165

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 5,077 nationwide Ram 2500 listings starting at $2,999.

ZIP:

Dodge Ram 2500 Experts

  • #1
    Dan Connell
    Reputation
    2,210
  • #2
    Ram2500Diesel
    Reputation
    640
  • #3
    tennisshoes
    Reputation
    550
View All

Related Models For Sale

Used Dodge Ram 3500
86 Great Deals out of 2,173 listings starting at $4,993
Used Ford F-250 Super Duty
338 Great Deals out of 43,424 listings starting at $1,250
Used Chevrolet Silverado 2500HD
319 Great Deals out of 29,043 listings starting at $2,650
Used Dodge Ram 1500
403 Great Deals out of 10,670 listings starting at $1,500
Used GMC Sierra 2500HD
109 Great Deals out of 13,205 listings starting at $4,450
Used Ford F-150
2,130 Great Deals out of 181,862 listings starting at $1,000
Used Chevrolet Silverado 1500
2,080 Great Deals out of 181,410 listings starting at $1,898
Used Ford F-350 Super Duty
338 Great Deals out of 23,465 listings starting at $1,895
Used Chevrolet Silverado 2500
6 Great Deals out of 243 listings starting at $3,995
Used Toyota Tundra
427 Great Deals out of 33,471 listings starting at $1,999
Used GMC Sierra 1500
783 Great Deals out of 67,750 listings starting at $1,350

Used Cars For Sale

2010 Dodge Ram 2500 For Sale
12 Great Deals out of 324 listings starting at $9,850
2009 Dodge Ram 2500 For Sale
13 Great Deals out of 272 listings starting at $8,900
2008 Dodge Ram 2500 For Sale
20 Great Deals out of 576 listings starting at $7,990
2007 Dodge Ram 2500 For Sale
23 Great Deals out of 720 listings starting at $6,500
2006 Dodge Ram 2500 For Sale
25 Great Deals out of 1,142 listings starting at $6,500

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.