Wait to start light - Diesel Bombers



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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Old 03-20-2011, 06:32 PM
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Default Wait to start light

My air dog pump does not turn on when i turn the key or bump the starter......also the wait to start light no longer comes on too...how can i test to see it the fuel relay is bad?
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Old 03-20-2011, 06:51 PM
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Swap it with another relay under the hood. Test the function of relay being swapped first, like the horn, or blower.
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Old 03-20-2011, 06:58 PM
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Listen to him he does know his stuff about the cummins sometimes even more than the manufacturer techs of aftermarket products that you call for help. TRUST ME ON THIS!!!!!!!!!
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Old 03-20-2011, 07:45 PM
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relay is workin.....still no wait to start light......is it possible to have 15lbs of pressure at idle with out the the air dog workin?
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Old 03-20-2011, 08:26 PM
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No, that's not very possible. There is a small hole in the overflow valve that always allows fuel to excape from the injection pump. It is more likely that your WTS bulb has burnt out. Not that that is the issue, but it is more probable.
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Old 03-20-2011, 09:40 PM
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A friends truck is doing something similar but the wait to start light takes a few seconds to come on and the airdog does not cycle until the wait to start light comes on. Does the truck start fine? Does the airdog come on when you bump the starter/
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Old 03-20-2011, 10:03 PM
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exactly as long as the pump starts running when the starter engauges no issues. To prime the fuel system on my old 2000 the pump would not run with the key in just the on position, the starter had to be bumped for the ecm to send a signal to the pump.
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Old 03-21-2011, 08:59 AM
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well heres the thing....it used to come on when i turned the key and when i bumped the starter....just quit a few days ago.... i noticed that it had stopped giving a lil shot during the wait to start....then i put a fuel pressure gauge on 3 days ago and bumped the starter and cracked a fuel line to get the air out of the system and the pump never came on.....i ended up having to crank the motor with the fuel lines cracked goin into the block to get the air out.........truck runs fine and starts fine.......i just want to be sure its alright to drive like this.......i just changed the vp44 2 weeks ago when the factory lift pump died
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Old 03-21-2011, 09:04 AM
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As long as you have pressure while the engine is running, no damage should occur.
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Old 03-21-2011, 10:12 AM
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alright thanx just wanted to nip this in the bud before i was on the hook for another $1500

---AutoMerged DoublePost---

Check Engine light came on.... P1689 ?

Last edited by CajunDevilDog; 03-21-2011 at 10:12 AM. Reason: Automerged Doublepost
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