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Old 11-02-2019, 12:18 PM   #1
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ISB 5.9 2002 Bounder

Motor died check engine soon light came on. Stress level boiled over.
Cranked over but wouldn't start
Had it towed (1st time) to shop
Had fuel pump replaced
Drove two hours to RV park with no issues
Shut it down in but it wouldn't start back up
Tech worked very hard for 2 days at RV park testing circuits and sweating (92į)
Had ECM checked by Freightliner, it was OK
After priming the motor it started and ran fine with no issues
Drove it to the shop and they're still working on it with much vigor.
Maybe lift pump? They're not sure.
3 Techs worked all day on it today
They tested, bypassed, stressed all the circuits. Even changed starting batteries.
It now runs great but it won't start without priming.
We'll see on Monday....
Have my DW so all is good
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Old 11-05-2019, 03:32 PM   #2
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What you are describing are classic symptoms of an air leak in a fuel line.
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Old 11-05-2019, 04:59 PM   #3
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Does your engine have the vp44 injection pump. Is that the pump they changed or just the lift pump. Large price difference between the two. These engines are famous for the lift pump going, and taking out the injection pump with it. They built these style from 98 1\2 to 02 I believe.
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Old 11-06-2019, 08:14 AM   #4
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Does your engine have the vp44 injection pump. Is that the pump they changed or just the lift pump. Large price difference between the two. These engines are famous for the lift pump going, and taking out the injection pump with it. They built these style from 98 1\2 to 02 I believe.
He's right on the money. I has a 02 Dodge with the Cummins. Lift pump dies and kills the VP44.

Check this website..... www.mopar1973man.com these guys will do everything to help you and know absolutely everything about that motor.

Now, what I remember when people had the same problem after changing the pumps was there is a crush washer on the head on the last cylinder that would leak off at night. Very pesky to change and caused major headaches to the victims.
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Old 11-06-2019, 08:19 AM   #5
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Found it....

https://mopar1973man.com/topic/16554...comment-216327
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Old 11-08-2019, 05:56 AM   #6
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What you are describing are classic symptoms of an air leak in a fuel line.
Exactly. see my blog link below. Should always prime by bumping the starter once.
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Old 11-08-2019, 05:59 AM   #7
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Now, what I remember when people had the same problem after changing the pumps was there is a crush washer on the head on the last cylinder that would leak off at night. Very pesky to change and caused major headaches to the victims.
Always install new crush washers when working on the lift pump connection or filter connections.
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Old 11-08-2019, 09:27 AM   #8
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Exactly. see my blog link below. Should always prime by bumping the starter once.
This should be noted that you have to bump the starter to get it to prime. Just turning the key to the on position doesn't activate the lift pump.
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Old 11-09-2019, 06:32 AM   #9
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This should be noted that you have to bump the starter to get it to prime. Just turning the key to the on position doesn't activate the lift pump.
Yup. I installed the glowshift remote gauge to monitor the FP and just turning on the key does nothing. Once the starter is bumped it goes up to 17 lbs. I can also monitor the manifold temp and turbo boost. When travel at 65 mph I push 11 PSI on the fuel, 10 on the boost and 850 on the temp.

At WOT and pushing up hill I see pressure down to 9-10, boost up to 22 lbs temp up to 1250.

This gauge saved me a new V44 when I saw the fuel pressure when down to 5 lbs. A check with a mechanical gauge showed only three pound. Immediately replaced the lift pump and changed filters. Got good pressure after that. (already replace one 10 years ago)
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