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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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I was wondering what a map sensor does and if any one has every had a apps wiring issue?... JOIN NOW TO REMOVE TRACER

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  #1  
Old 12-06-2009, 12:03 PM
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Angry What does a map sensor do and what would be syptoms

I was wondering what a map sensor does and if any one has every had a apps wiring issue?
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Old 12-06-2009, 12:31 PM
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MAP is Manifold Air Pressure. If it is not reading properly there will more than likely be poor engine performance, and perhaps be accompanied by black smoke. If the Engine Controller can not read Air Pressure, it could continue to dump fuel into the cylinders until if sees something. There are boost "foolers' that do similar things, but still leave your truck drivable.

Never had a APPS wiring problem, but I have adjusted mine recently, and have fooled it as well.

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Old 12-06-2009, 12:57 PM
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Is it possible to replace APPS and not erase the code and have still problems because you didnt erase the codes. Im shooting two codes and one was the map and the other is the Apps. So I replaced the APPS and problem still same. Limp mode throttle jumpy dead pedle. Then the throttle kicks in and out. even seems to stick a little once letting off. Totally stumped.
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Old 12-06-2009, 03:00 PM
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Ya you need to clear the codes first.
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Old 12-06-2009, 04:09 PM
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clear codes and they come back almost in seconds. Im thinking short in comeputer or broken wire some where.
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Old 12-06-2009, 05:32 PM
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start with checking and cleaning all of the grounds. And you said you did replace the apps but the problem still exists and that clearing the codes they come back right away. Are you clearing the codes with a scan tool or disconecting the batts? If you are using a scan tool that should clear the hard fault codes but just disconecting the batts will not anyways if they do clear and comeback i would check all of the grounds and all of your connectors to the map, apps any bulk head connectors and the connectors at the pcm try that and see what happens.

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Old 12-06-2009, 11:01 PM
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seems like your map senser isnt pluged in all the way thats what my truck did when i had the same problem check there mine clicked and locked and everuything just need a little bit more for the full connection

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Old 12-14-2009, 11:52 AM
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put some cleaner on the conections
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Old 01-27-2011, 09:49 AM
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i'm having the same problem. i cleaned all my grounds cleaned my battery connections and still have the problem. some people say it could be the ecm but i havent cleared the codes yet.

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Old 01-27-2011, 03:48 PM
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Dont forget to reset your Apps with the gas pedal.

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