help

[geedub6893]

2 months ago the truck would get dead pedal or half throttle when you turned the quadzilla up and itd buck and act up till i flashed the ecm with my smarty and itd be fine till i got on it again. I thought it was the box so i sent it back and got a edge and it still does it and now its like this full time now. The check engine light is on with p0237 map sensor low. Ive tried cleaning it. Everyone is too quick to point at the injection pump but no one can give me a solid answer. The twist to this truck is if i load a small fuel tune with the smarty it acts fine. or i can run the edge on 0 and smarty on 9 and it runs great. but if i load the stock tune on the smarty it has no power on any level with the edge. i was at ts outlaw 2012 over the weekend and the truck dynoed 333hp 840tq with the smarty and edge stacked so i dont think the ip is bad. if i need a map sensor i dont mind getting one but i dont want to spend money on something not broke. the truck has an airdog 150 with new filters and doesnt have less then 13 psi. the only thing i can guess is what ever the smarty is fooling is what is worng with the truck because the smarty fixes what ever electrical problem im having. also the check engine light stays on even if i try to erase the code so that means its happening all the time right? you may ask why i wouldnt just run the smarty all the time but its not mine to keep and the throttle is too touchy like this. without the smarty i would of made more hp on the dyno. id like to get my check engine light off too. if someone knows my problem or if mopar man wants to call me or anyone else wants to help me diagnose this problem call my cell tomorrow 3049932223
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[geedub6893]

Bump ttt

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[tractorguyacb]

Is it a juice with attitude or a comp? Any way of electronically looking at boost numbers through the map sensor.? It sounds like you have no power on a stock tune because the map is bad and not reading boost thus not incresasing fuel, when you load a moderate tune in it does map sensor fooling, maybe that is creating enough boost to push it past the bad spot. Generally map sensor low equates to something open inside the MAP. Perform this test with a Multi Meter, Key on Engine off. For the Signal Wire, you might have to backprobe it and run a wire in the cab to monitor for full boost. Also you might want to triple check all the connections for the edge at the MAP.

1. Check the voltages at the Manifold Absolute Pressure (MAP) sensor with it plugged in.

2. The Orange wire is the 5 volt power supply and should produce a constant 5 volt power supply to the MAP sensor and oil pressure sensor.

3. The Black/Light Blue wire is the sensor ground wire and should have less than 50mV present whenever the key is on.

4. Next check the MAP sensor signal wire. The wire is Gray/Red and should read about 0.5 volts key on engine off and about 1.9 volts at full boost.