Good Sam Club Open Roads Forum: Tow Vehicles: Keeping Diesel Engine Warm
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 > Keeping Diesel Engine Warm

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Picinisco

Gilbert, AZ

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Posted: 12/04/18 08:11am Link  |  Quote  |  Print  |  Notify Moderator

My dodge dually Cummins engine is very hard to start when cold. At home or camping with hookups I can plug in the block heater but what can be done when boondocking.


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ShinerBock

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Posted: 12/04/18 08:13am Link  |  Quote  |  Print  |  Notify Moderator

Is your grid heater working properly?

Ductape

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Posted: 12/04/18 08:19am Link  |  Quote  |  Print  |  Notify Moderator

Is your intake heater working properly? That engine should start fine in the cold. I had the same truck.


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Picinisco

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Posted: 12/04/18 08:27am Link  |  Quote  |  Print  |  Notify Moderator

Ductape wrote:

Is your intake heater working properly? That engine should start fine in the cold. I had the same truck.


It seems to be but is it something that can deteriorate and still show that it is working?

rhagfo

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Posted: 12/04/18 08:29am Link  |  Quote  |  Print  |  Notify Moderator

Picinisco wrote:

My dodge dually Cummins engine is very hard to start when cold. At home or camping with hookups I can plug in the block heater but what can be done when boondocking.


Describe cold, 40, 30, 0 or colder. Many times I don’t even wait for the wait to start light to go out, just crank. With full heater grid cycle starts right up!
Check out your heater grid, also how many miles!


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ScottG

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Posted: 12/04/18 08:54am Link  |  Quote  |  Print  |  Notify Moderator

Something is very wrong. The Cummins will start fine even without grids at temps to -20F.
It may be getting close to needing a high pressure pump and/or injectors or something else. How old are your batteries? If the ECM doesn't see a minimum engine speed during cranking it will not fire the injectors.
Rather than do anything else, I would get it looked at.


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memtb

Wyoming

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Posted: 12/04/18 08:55am Link  |  Quote  |  Print  |  Notify Moderator

How cold is cold? As others have mentioned.....is your intake grid heater working at all or properly? We can and have “many” times started ours at -20 F. Until you get it checked-out....you may try “cycling” the grid-heater twice and then attempt a start.

As mentioned you may have a bad heater. One of the things that can/will shorten the grid-heater life expectancy, is to bring the engine rpms up (in excess of 1100 or 1200) until you see the amp/volt meter quit cycling. The drawing of excess “cold” air across the hot grid-heater, is pretty hard on it. The Dodge/Cummins manual used to warn about this!


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Mark Heisler

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Posted: 12/04/18 09:04am Link  |  Quote  |  Print  |  Notify Moderator

2 things
How cold is it?
What weight of oil are you running?
Any thing after -5F you should be plug your truck in. if not the truck will knock like crazy running 15w40 oil that pretty thick for winter use if not plugging in


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Picinisco

Gilbert, AZ

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Posted: 12/04/18 09:09am Link  |  Quote  |  Print  |  Notify Moderator

memtb wrote:

How cold is cold? As others have mentioned.....is your intake grid heater working at all or properly? We can and have “many” times started ours at -20 F. Until you get it checked-out....you may try “cycling” the grid-heater twice and then attempt a start.


rhagfo wrote:

Describe cold, 40, 30, 0 or colder.


You may be right. Im in southern AZ so cold is 40s and 50s.

Will replace the heater grid first.

Beentherefixedthat

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Posted: 12/04/18 09:16am Link  |  Quote  |  Print  |  Notify Moderator

I agree with those who say you have a problem. My 2016 Ram TDSL started at well below -20 deg on the Alaska Highway without being plugged in overnight.

(all the plugs at the motel were taken)

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