12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

problem starting

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  #1  
Old 10-20-2012, 11:49 PM
cody dewees's Avatar
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Default problem starting

i got a 98 12v that when i go to start it i have to give it a little fuel if i dont it just cranks and cranks its got me stumped could use some help
 
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Old 10-21-2012, 06:52 AM
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You have to. It allows the shut off solenoid to open.
 
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Old 10-21-2012, 12:53 PM
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My 97 does that once in awhile I dont think its supposed to do that though because it dont do it all the time.I have found if I tap on it a few times it wont do it again for a while but I dont know what the problem is yet.
 
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Old 10-21-2012, 01:49 PM
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My brothers 95 did that for a few months and we didn't think about it any, but then it started taking 5 or 6 cranks and then it got worse. We took it to the stealership and they said it was the fuel solenoid. So we agreed to get them to fix it. It came back starting first crank every time with an $800 bill. It went out six months later with no warranty. Turns out the part is only held on by 2 screws and an r-pin. The part we needed was $130 with free shipping!!!!! It is something you can replace in your driveway with ratchet set and a pair of needle nose pliers. As for having to press the pedal, there is a screw on the driver side of the motor that controls the amount of fuel going in the motor. You turn it in some so it puts a little more fuel. It will slightly increase your idle though. The sweet spot on his was around 700-800 rpm. The screw slowly vibrates loose so every few years or so you need to screw it in some more. Each of these jobs take about 15-30 minutes depending if the screws are rusty. I live in Texas so there was no rust on that 95.

---AutoMerged DoublePost---

Also, if you look up a pic of that solenoid on Google, there is a rod on the bottom of it. If your truck needs that solenoid, turn on your truck so the ignition is in the "on" position (the position its in when its running). Pop the hood and pull that rod up. You will here it click in place. You can start your truck after that. Look at my thread on how to rig a pull cable that you can pull from inside the cab. Hope that helped!!!!
 

Last edited by Truck Guy99; 10-21-2012 at 01:49 PM. Reason: Automerged Doublepost
  #5  
Old 10-21-2012, 04:17 PM
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Originally Posted by Dallas Flywheels
You have to. It allows the shut off solenoid to open.
No I don't think so, mine starts and idles without touching the throttle
 
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Old 10-21-2012, 05:32 PM
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More than likely you have a small air leak....

 
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Old 10-21-2012, 08:29 PM
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I dought its an air leak because mine does the same thing once in a while and every time it does it I can get and check the fuel shut off selonoid and it hasnt pulled its self up but it doesn't do it all the time.
 
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