1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

Truck won't start - Lift pump?

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  #1  
Old 05-15-2009, 12:46 PM
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Default Truck won't start - Lift pump?

I only drive my ole first gen about once a week so I went out today to fire it up & take it down the road but it wouldn't crank. It normally doesn't even turn over once before it fires but today I got nothing. I took a look & I can see where the lift pump & block are wet, looks like fuel, just got there. So I "primed" the pump with the manual lever, it felt like it pumped the first time, the second time nothing. If I waited a couple seconds it would pump again. Anyway, it fired. No smoke, everything sounds fine & runs fine, it doesn't run flat or anything like that.
Is the lift pump on it's way out or already shot? What's a good direct bolt on upgraded pump?
 
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Old 05-15-2009, 12:52 PM
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well if you can get it to prime, it sounds like maybe to me you have a ruptured supply line or something along those lines...its probably sucking air thru where ever the fuel that you described that is all over your engine
 
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Old 05-18-2009, 07:17 AM
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Checked lines, no problems there.
Any other input appreciated.
 
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Old 05-18-2009, 10:15 AM
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check the gasket on the block mine did the same it all wet and nasty pull the pump of and put gasket sealer and go truckin
 
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Old 05-18-2009, 11:49 AM
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If it is leaking fuel out it is leaking air in, Find teh leak and fix it and I bet your problem is solved. Your losing prime some how. The IP will pull fuel from the tank and the engine will run with a bad lift pump (wont like it though) but if there is any air in the lines it wont pull any fuel.
 
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Old 05-18-2009, 02:04 PM
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Bad lift pump that goes too long = problems for the IP, right? I do see a little oil too so could be the seal to the block is leaking. I assume the old diaphragm pump will leak fuel when it's bad & lose it's prime?
 
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Old 05-18-2009, 03:15 PM
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A bad lift pump is not in any way going to keep the engine from cranking. The only thing that can cause that is an electrical problem, a starter problem, or an engine problem.

A bad lift pump on a VE truck will reduce longevity of the IP, not much at all if the pump isn't turned up, and still nowhere close to what a bad IP does to a VP truck.
 
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Old 05-18-2009, 03:21 PM
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I think he ment that it would not fire begle
 
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Old 05-26-2009, 03:51 PM
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Right on RSWORDS
 
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Old 05-26-2009, 04:06 PM
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You get it fixed yet?
 
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