map sensor - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 03-08-2010, 04:57 PM Thread Starter
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map sensor

i have a 2004 6.0 f250. is there anyway to test the map sensor to see if it is working?
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post #2 of 5 Old 03-08-2010, 07:32 PM
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Sorry to answer a question with a question, but why do you think that it might not be working?


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1987 Mercedes-Benz 300SDL -- 307,500 miles

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post #3 of 5 Old 03-09-2010, 04:40 AM
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A good scan tool will tell you if it is working. But the good ones are big $$
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post #4 of 5 Old 03-09-2010, 12:38 PM
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check the nipple on the intake where the hose from the map sensor goes to the intake. they like to fill with carbon and cause weird readings.
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post #5 of 5 Old 03-09-2010, 07:26 PM
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Weird readings like what? Mine goes haywire when it's warm out sometimes, especially after the engine bay has had some time to heat soak while the truck has been parked. Sometimes the sensor reads no boost, sometimes 40 psi or more, sometimes all over the place.

I'm reading boost at the Edge tuner, which is also reflected in the ScanGauge... perhaps it's a problem with the piggy-back harness on the MAP sensor?


1991 Volkswagen Jetta 1.6TD ECOdiesel -- 423,000 miles
2003 Ford F-350 6.0 -- 131,000 miles
1987 Mercedes-Benz 300SDL -- 307,500 miles

2000 Volkswagen New Beetle TDI (RIP)
1987 Mercedes-Benz 190D 2.5 Turbo (sold)


Helpful Links:
6.0 no-start | 6.0 turbo reconditioning | Test your coolant!

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