MAP Sensor Signals - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 2 (permalink) Old 12-06-2010, 04:16 PM Thread Starter
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'99 stroker's Avatar
Join Date: Jun 2010
Location: SW Colorado
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MAP Sensor Signals

What does the MAP send to the PCM as far as signals go? Is there a way to put a resistor in line to make the PCM think you are getting more boost and fuel a little more? Something along the lines of a 10k Mod

Early '99 ccsb 7.3l 4x4 6spd
All Stock Except
Air tank rear bumper
Brush guard w/ fog and driving lights
seat covers
after market floor mats
Fancy Halogen headlight bulbs
Rear license plate light is out

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post #2 of 2 (permalink) Old 12-06-2010, 06:25 PM
PHPDiesel's Avatar
Join Date: Nov 2007
Location: Sheep drive capital of the world, MT
Posts: 2,411
Re: MAP Sensor Signals

0-5V sensor

0V output from sensor will cause check engine light.
5V output from sensor will cause check engine light.

You want the output to the PCM to be between .4 and 4.8 volts.

If you "fool" the PCM into thinking that the MAP is higher than actual, you will defuel at a lower actual boost reading.

I assume this is for your E99 truck.

If you had a 95-97 truck, the MAP output is frequency based and these tips wouldn't apply.

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