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

governor problem???

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Old 12-15-2009, 06:44 PM
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Default governor problem???
i think my governor is bad but im not sure. my truck wont idle in gear or when it is cold. if i keep my foot on the trottle it will keep idleing fine. it runs perfect other than that. no grey smoke or any signs of lack of fuel
 
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Old 12-15-2009, 06:54 PM
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May have to turn up the idle screw.
 
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Old 12-15-2009, 07:25 PM
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it already idles a little high
 
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Old 12-15-2009, 08:55 PM
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It should idle at about 750 rpms in gear with the A/C on - if its an auto. Mine with the NV4500HD idles at 850 but with a manual that is not really a problem.

Bob
 
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Old 12-15-2009, 09:17 PM
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i dont have a tach but i know it atleast idles around 850-900 in neutral. it wont idle in gear
 
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Old 12-15-2009, 09:39 PM
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Maybe someone else will chime in and answer this, but could it be the KSB?
 
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Old 12-16-2009, 08:33 AM
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The KSB advances timing until the engine temp reaches about 100 degrees. I wouldn't think that would cause the problem. Cumminskid92 what mods have you done to your pump?

Bob
 
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Old 12-16-2009, 12:34 PM
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AFC spring out, fuel pin ground, max fuel about 3-4 turns
 
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Old 12-16-2009, 01:43 PM
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My first thought is that you might have to re-index the the throttle shaft but that is only a guess. Does your idle screw touch the throttle linkage? If not and you see 800+ RPMs then you will need to re-index the pump to get the idle into the safe range. Also did your problems start right after the pump mods or later?

Bob
 
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Old 12-16-2009, 05:18 PM
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Originally Posted by Bob Beauchaine
My first thought is that you might have to re-index the the throttle shaft but that is only a guess. Does your idle screw touch the throttle linkage? If not and you see 800+ RPMs then you will need to re-index the pump to get the idle into the safe range. Also did your problems start right after the pump mods or later?

Bob
This is probably the problem
 
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