MAP readings? - Page 2 - Diesel Forum -
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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post #16 of 18 (permalink) Old 05-13-2014, 05:13 PM Thread Starter
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Originally Posted by YT90SC View Post
DO you have a tuner? Some tuners skew the MAP reading. The actual sensor output is spot on, but the calculated MAP (what you see on the readout) is wrong. If you have a tuner, load your stock program and recheck before you go spendin a lot of money.
YT90SC you were right. I returned the tuner to Stock program and it reads 14 psi. When I switch to any of the other programs it reads 12 psi. Why do they skew the MAP readings like that?


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post #17 of 18 (permalink) Old 05-13-2014, 07:28 PM
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possibly to prevent defueling in their higher hp tunes.
only thing i can think of.

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post #18 of 18 (permalink) Old 05-14-2014, 11:29 PM
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Griz, I am not sure at all why. blue might be right, or they might drop it to prevent overboost codes or keeping the wastegate closed longer or... or... maybe some of the tuner guys might weigh in on this...

Dad always said,"Knowledge is limited but stupidity knows no bounds."
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