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24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps
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When i want to start my truck in the morning or even let it sit for like an hour its very hard to start and i have to bump the key to let the fass run then it will start. i put it in the ... JOIN NOW TO REMOVE TRACER

cummins hard to start

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  #1  
Old 02-08-2010, 09:39 AM
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Default cummins hard to start

When i want to start my truck in the morning or even let it sit for like an hour its very hard to start and i have to bump the key to let the fass run then it will start. i put it in the shop and they said it needed a new computer so i did that and it still didnt fix the problem it has a brand new vp-44, it has 20 psi on the fuel when running. imput please i am beating my head against the wall trying to figure this out.
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Old 02-08-2010, 11:24 AM
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my truck is doing the same thing i have to bump the starter to get it to start i have no clue what it could be.

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Old 02-08-2010, 12:25 PM
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Does it run fine after it starts?
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Old 02-08-2010, 12:44 PM
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your getting air in the system and it's not staying primed.

01quadcab's Sig:01 edge drag comp, fass 150 with vulcan big line kit,amsoil front to back,custom cold air intake with s&b filter with compounds and trans by Jefferson State Diesel 683hp vp truck. 11.91 1/4 http://jeffersonstatediesel.com Now back stock. 95 f350 crew cab fummins in the works. 12v 215 pump 4k, towing cam, compound turbos, ddp 90's, billet 47rh, Spec Rite triple disc converter. getting close to being done
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Old 02-08-2010, 01:23 PM
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So I just need to check all the lines coming from the tank or what?
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Old 02-09-2010, 06:10 PM
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Ok update on the truck i have checked every fuel line that the truck have and im not getting any air anywhere but im am throwing two codes p1693 and p1694 what are they if anyones knows
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Old 02-09-2010, 06:49 PM
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P1693 (M) DTC Detected in PCM/ECM or DTC
Detected in ECM
A 9Companion DTC9 was set in both the ECM and PCM.


P1694 Fault In Companion Module No CCD/J1850 messages received from the powertrain
control module-Aisin transmission


P1694 (M) No CCD Messages received from
ECM
Bus communication failure to PCM.

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A little here a little there.



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Old 02-09-2010, 07:35 PM
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So what do them mean?
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Old 02-13-2010, 07:59 AM
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The fault code that we need to be concerned about is P1694, it means that there is a communication problem between the ECM(Cummins controller) and the PCM(powertrain control module) . The modules communicate over the ccd bus. The ccd bus is a two wire communication system that allows the computers to talk to each other. This ccd bus is going down and causing your problems.

The first thing I would check is the main large connector in the fuse box in the engine compartment. Make sure the connector is bolted down all the way and you can't pull it up. I am thinking we are losing a power or ground to the ECM and we need to start by checking that connector and make sure all the fuses are inserted all the way.
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