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5.9 Liter CR Dodge Cummins 03-07 Discussion of 5.9 Liter Dodge Cummins Diesels with Common Rail Injection

Does an 03 have a vacuum pump and if not how is the a/c controlled? i've been wondering this so i know how to do my vacuum pump and powersteering pump when i do my 12v. thank you for any help... JOIN NOW TO REMOVE TRACER

vacuum pump?

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Old 04-25-2011, 08:33 PM
zach_west's Avatar
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Default vacuum pump?

Does an 03 have a vacuum pump and if not how is the a/c controlled? i've been wondering this so i know how to do my vacuum pump and powersteering pump when i do my 12v. thank you for any help

zach_west's Sig:03 dodge reg cab long bed 4x4. black and chrome wheels w/ 315s. Soon to be upgrades:12v, 5 in. exhaust, single disc valair, FASS lift pump, and other various goodies.
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Old 04-25-2011, 09:29 PM
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I think the blend doors for the hvac are electric and the brakes are hydroboost. I don't think the 3rd gens have a vacuum pump but I could be wrong.

white93's Sig:1993 D-250. A few towing mods.
1991 D-250 Bone Stock.
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Old 05-01-2011, 09:58 AM
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The 03's and early 04's have a vacuum pump that is used for the cruise control.
The pump is located on the passenger side in the rear corner behind the battery.
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Old 05-01-2011, 08:21 PM
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ok i'll look for it tomorrow. how is it ran?
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Old 05-01-2011, 09:20 PM
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Originally Posted by zach_west View Post
ok i'll look for it tomorrow. how is it ran?
There is a elect. plug on the side of it.
When you first turn the key on it will run for a few seconds to fill the line up.
If you have no vacuum leaks it will shut off and then cycle as needed.
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Old 05-01-2011, 09:25 PM
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i'll have to look at a schematic for it. I'm wondering if it is also ran off of my ecu. I shouldn't have a problem with a cruise operating then when I put my 12v in then
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