Map sensor problem

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MatthewGoff

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Feb 23, 2018
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Location
Pascagoula, Mississippi
Ram Year
2003
Engine
4.7
Ok still having problems with the truck. Started with the ecm shutting off on its own. It’s at an electrical shop now. They installed and programmed a new computer but now he’s having problems with the map sensor. He put a new one on and it still stumbles and stalls so he says he’s not done with it. Now could this be vacuum related or possibly a dirty throttle body? I know I’ve never cleaned the TB and it has 240,000 miles on it. Always had the stumbling and surging at idle since I’ve had it and tracked a few vacuum leaks down and it seemed to help. I’m $850 in on it at this shop and almost $600 in parts alone from before I gave up and took it to a shop
 

Karlsweg

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2007
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5.7 hemi
I would definitely clean the throttle body. As far as the map sensor voltage loss I would take a good look at the connector and wires.
 
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MatthewGoff

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2003
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So I guess I just need to pay the $850 and deal with what’s left of the problems on my own. It’s been close to 7-8 weeks without it. If it’ll run I can figure out the rest I suppose
 

Marley

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VA
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2004
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5.7
Map sensors control a bunch.
I actually had to go to a twist-on sensor as my truck didn't like the screw-on, go figure.

Clean the TB and run some Techron through it.
 

zman1978

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kentucky
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2004
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4.7
Had the problem with mine replaced MAP sensor then had to replace throttle position sensor. Now were golden.
 
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