94 ram 12V Cummins, starts then dies UPDATE w/hillbilly fix!
#2336615
07/13/17 07:08 PM
07/13/17 07:08 PM
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Joined: Jan 2008
Posts: 4,255 Canada
WO23Coronet
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My new to me '94 Cummins 2500 started doing something cute. You go to start it and it fires up right away but immediately dies. It seems if you stab the throttle at the right time it'll catch and stay running. Once it's running it runs fine, no hesitations, good power, etc. could it be the shut off solenoid? Lift pump?
Last edited by WO23Coronet; 07/27/17 05:32 AM.
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Re: 94 ram 12V Cummins, starts then dies
[Re: WO23Coronet]
#2336638
07/13/17 08:13 PM
07/13/17 08:13 PM
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Joined: Oct 2006
Posts: 246 Cranberry Twp PA (North of Pit...
rumblefish72
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Cranberry Twp PA (North of Pit...
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My bet is that the little rubber boot on your fuel shutoff solenoid has deteriorated and is jamming up the movement of the shutoff rod. That solenoid has two coils ... a big "Start" coil that is energized when you hit the starter. Once you release the starter, the solenoid drops to a second smaller "run" coil. With the rod boot jamming up the works, the start coil will yank open the fuel valve but the run coil isn't strong enough to hold it open so the fuel is cut off and the engine dies. That's what happened on my '97 Ram 2500 CTD. Geno's sells just the boot at https://www.genosgarage.com/product/sa-4153/fuel-system-accessories-replacement-parts
Last edited by rumblefish72; 07/14/17 09:36 AM.
1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ
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Re: 94 ram 12V Cummins, starts then dies
[Re: WO23Coronet]
#2336659
07/13/17 09:36 PM
07/13/17 09:36 PM
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Joined: Oct 2009
Posts: 276 Temecula, Ca.
zzyzxpat
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Posts: 276
Temecula, Ca.
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Yep, no glow plugs, they use a heater on the air intake. I have been in close to zero degree weather, never needed to wait on either of my Cummins, a 96 and 2000 24V. A cornbinder in a Ford, it will not start with out the glow plugs even at 70 degrees it seems.
" The last official act of any goverment, is to loot the treasury" George Washington
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Re: 94 ram 12V Cummins, starts then dies
[Re: WO23Coronet]
#2336696
07/13/17 11:08 PM
07/13/17 11:08 PM
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Joined: Feb 2006
Posts: 608 TN
1DGEMAN
mopar
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mopar
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Posts: 608
TN
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Does it have a GSK in the pump? I have a 4000 rpm GSK on my 97 and I have to apply just a little pressure on the throttle to get it to start. If the run solenoid is not working it will not start at If the lift pump is failing which is rare on a 12 valve it would start but run very poorly under load.
Real Men shift for themselves
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Re: 94 ram 12V Cummins, starts then dies
[Re: DaytonaTurbo]
#2336853
07/14/17 11:36 AM
07/14/17 11:36 AM
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Joined: Jan 2008
Posts: 4,255 Canada
WO23Coronet
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You can disconnect the solenoid and wire the fuel shutoff lever in the run position, hit the key and see if it still acts the same. This is my plan, I took a look at the solenoid and just noticed that it's held on with a pair of vice grips lol. Probably a good indication of my woes
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Re: 94 ram 12V Cummins, starts then dies
[Re: WO23Coronet]
#2343937
07/26/17 10:03 PM
07/26/17 10:03 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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About to go away
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Posts: 14,889
up yours
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Sorry, I know crap diddly about diesels, my oldest daughter is the diesel expert in the family, she used to be a mechanic in the Army.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: 94 ram 12V Cummins, starts then dies
[Re: Supercuda]
#2344087
07/27/17 05:31 AM
07/27/17 05:31 AM
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Joined: Jan 2008
Posts: 4,255 Canada
WO23Coronet
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Hillbilly fix: When I took my solenoid off I tested it and it worked fine but the boot was non existent. I could order a boot but it had to come from the US ($30-$40), which is no biggie but it takes awhile. I called Cummins and they want to sell you a whole solenoid assembly for $700! From the pics I saw of an oem boot it reminded me of those punchy balloons you could get as a kid. So I went to the party store, bought a pack and brought them home. They looked about the right size so I picked the least flamboyant color, cut the end off the body and slipped it on. Fits pretty decently lol! AND cost me about 50 cents! It's made of fairly heavy rubber so it should last abit hopefully
Last edited by WO23Coronet; 07/27/17 05:35 AM.
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