12v cold starting issues - Page 3 - Dodge Cummins Diesel Forum
94-98 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

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post #25 of 34 (permalink) Old 02-27-2012, 03:03 PM Thread Starter
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So I did what you said today and it works. Starts right up after I prime it. So I took off the fuel heater electrical plug and it was wet inside it. I knew right away that the fuel heater had to go. My truck is 4x4 so there's a big differential underneath it, I'll enjoy uninstalling the fuel heater. I'll get it out and see if that fix the problem. Hopefully I don't have a leak somewhere else. Thanks!

Found this video to help me.



1997 12V Dodge Cummins 2500 4x4 Laramie,
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Last edited by DrinkMe; 02-27-2012 at 03:07 PM.
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post #26 of 34 (permalink) Old 02-27-2012, 04:45 PM Thread Starter
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Just got it done, I think he said you need a 13/16 socket to remove the pre-filter bow but it's actually a 11/16. I was surprise at how loose it was, the 8mm hex to remove the heater was also very lose. For those that need to do this the key is to get a bunch of socket extensions, you will need a short one like the one shown in the picture below. You will also need a swivel for the extensions.



15 min job if you have all the tools and 5 min to clean the pre-filter.

I'll let you guys know if it's fixed after a few more days. Need to test a couple of times before I get all happy again.

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Last edited by DrinkMe; 02-27-2012 at 04:48 PM.
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post #27 of 34 (permalink) Old 02-27-2012, 05:45 PM
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Keep us updated. Glad I was able to point you in (hopefully) the right direction. I usually am on the receiving end of the knowledge, so it brings a smile to my face if I can pay it forward.

2012 Ram 3500 SRW Crew Cab Laramie - Black on Black. Short Bed. Stock as could be.
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post #28 of 34 (permalink) Old 03-03-2012, 01:15 PM Thread Starter
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Update: since I removed the fuel heater it has been starting up good till the last 2 days. It's 40F this morning and it start up on the first crank but then it shuts off after 5 sec. I prime the fuel about 35 times and crank it again but it didn't fire up till ~20sec of cranking. gray/blackish smoke puff out after cranking for about 10 sec and it starts at ~20sec. Had to keep the gas pedal depress for a while after that till it stay running. a bit of blue smoke come out when it idle after. I think that's normal because it was doing that before I had the problem.

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post #29 of 34 (permalink) Old 03-09-2012, 02:42 PM Thread Starter
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I just installed a fuel pressure gauge. Reading 18-19 psi idle. 21 psi 2100RPM, it never exceed 21 psi. Under empty bed load acceleration it drops to 17 psi (never drop below 17psi).

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post #30 of 34 (permalink) Old 03-09-2012, 07:48 PM
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Quote:
Originally Posted by DrinkMe View Post
I just installed a fuel pressure gauge. Reading 18-19 psi idle. 21 psi 2100RPM, it never exceed 21 psi. Under empty bed load acceleration it drops to 17 psi (never drop below 17psi).
Numbers are bit low but good enough that they wouldn't effect anything.

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post #31 of 34 (permalink) Old 03-10-2012, 07:09 PM
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have you checked your timing it may have slipped
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post #32 of 34 (permalink) Old 03-10-2012, 08:38 PM Thread Starter
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I just ordered TORK TEK CUMMINS ADJUSTABLE OVERFLOW VALVE OFV020. Mine look like it's the stock one and the truck is 200k miles so it's time to replace it. I'm also having top end power loss. I really have to floor it to go 70mph.

No I have not check my timing. I guess I'll look into that next.

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Last edited by DrinkMe; 03-11-2012 at 09:11 PM.
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post #33 of 34 (permalink) Old 03-15-2012, 02:11 AM Thread Starter
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I stretched the spring inside the stock overflow valve and the fuel pressure sits at 25psi idle. Truck starts up good every morning ever since. Still waiting on that OFV020.

1997 12V Dodge Cummins 2500 4x4 Laramie,
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post #34 of 34 (permalink) Old 03-19-2012, 08:04 PM Thread Starter
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Update: The stretched overflow valve spring works good so I got the OFV020 adjustable valve and it's on the truck since friday. Idle fuel pressure is now 24 psi. It goes as high as ~34psi at 2k+ rpm. The truck is a lot powerful now (I bought the truck back in the summer and never really know how the stock power was). So I was driving a very sluggish truck around till now!

It started up good Saturday, Sunday, and this morning when it was really cold. Thanks all again for your help!

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