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Truck starts and runs for 2-3 minutes then dies

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Old Apr 18, 2016 | 07:04 PM
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Default Truck starts and runs for 2-3 minutes then dies
1999 Dodge RAM 1500 5.9L sport. Can not figure out what the the problem is replaced the distributor cap and rotor, spark plugs (old ones had a lot o carbon build up), ignition coil, and fuel pump. Truck has compression, and fuel pressure. Has no spark after it dies, let it sit for awhile and it will start up and die again.
 
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Old Apr 18, 2016 | 07:05 PM
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Does the fuel pump run while cranking, when you have the no-spark condition?
 
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Old Apr 18, 2016 | 07:26 PM
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Originally Posted by HeyYou
Does the fuel pump run while cranking, when you have the no-spark condition?
It turns on when you cylce the key, it does run run because I have good fuel pressure.
 
Last edited by kussy99; Apr 18, 2016 at 10:44 PM. Reason: Wrong info
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Old Apr 18, 2016 | 07:36 PM
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That indicates the PCM isn't seeing the engine turning once it dies. Possible crank sensor?
 
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Old Apr 18, 2016 | 08:33 PM
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Originally Posted by HeyYou
That indicates the PCM isn't seeing the engine turning once it dies. Possible crank sensor?
That is what I'm getting ready to replace
 
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Old Apr 18, 2016 | 09:57 PM
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It's a pain, but, doable.

Get your new sensor from the dealer. The aftermarket fellers don't always play nice with the PCM.
 
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Old Apr 18, 2016 | 10:13 PM
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Originally Posted by HeyYou
It's a pain, but, doable.

Get your new sensor from the dealer. The aftermarket fellers don't always play nice with the PCM.
I got one from advanced. Installed it. It has spark now. But still just
crankes.it tries but won't turn over
 
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Old Apr 18, 2016 | 10:19 PM
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Originally Posted by HeyYou
It's a pain, but, doable.

Get your new sensor from the dealer. The aftermarket fellers don't always play nice with the PCM.
I got one from advanced. Installed it. It has spark now. But still just
crankes.it tries but won't turn over
 
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Old Apr 19, 2016 | 09:44 AM
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Are you getting GOOD spark? On all cylinders? Does it even attempt to fire? Backfire? Anything at all?
 
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Old Apr 19, 2016 | 02:02 PM
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Originally Posted by HeyYou
Are you getting GOOD spark? On all cylinders? Does it even attempt to fire? Backfire? Anything at all?
Has spark. It kind of tries. Back fired when it died. Ran for 20- 30 minutes this morning after it sat all night. Replaced that censor last night.
 
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