Map Sensor

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May 10, 2005 | 09:09 PM

Medic 66

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Map Sensor

When I had some work done by the Ford garage, they told me that my "map sensor" was unplugged. I never knew any different driving either way. They plugged it back in for me and it is the same as always....just wondering what a map sensor is for?? Puzzling...............must be like an appedix....just their?

May 11, 2005 | 01:26 AM

rockyrider

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MAP: Manifold Absolute Pressure sensor Strategy and feedback input; The PCM monitors manifold pressure to control fuel delivery in order to minimize smoke. It also optimizes injection timing for detected boost. It also monitor boost to limit fuel delivery to control maximum turbo boost. Frequency output; 111Hz=14.7psi, 130Hz=20psi, 167Hz=30psi. PID: MAP (pressure basline 14.7psi), MAP HZ (frequency), MGP Manifold Gauge Pressure (pressure base line 0psi) turbo boost

May 11, 2005 | 02:37 AM

Biwanylo

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Cool Thats a lot of good info

Jun 19, 2005 | 06:51 PM

djf48

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Where would I find the MAP sensor on a 1997 F250?

Jun 19, 2005 | 06:58 PM

Quadzilla

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From: Bonney Lake, WA

Quote:

Where would I find the MAP sensor on a 1997 F250?

It's located on the passenger's side firewall. It can be identified by the vacuum line that's connected to it, which leads to a port on the engine behind the engine cover.
If the original poster couldn't tell a difference in how the truck ran with the MAP line disconnected, I'd have to speculate that it's faulty.

Jun 19, 2005 | 08:52 PM

Medic 66

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How do I test to see if it is indeed faulty.......being that I am the orginal poster and all.

Jun 19, 2005 | 09:54 PM

djf48

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Is that the vacuum hose that I "T" into for my boost gauge?

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Jun 19, 2005 | 10:01 PM

Kwikkordead

Fleet Owner

Joined: Jun 2004

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From: Rio Rico, AZ.

Quote:

Originally Posted by rockyrider

Frequency output; 111Hz=14.7psi, 130Hz=20psi, 167Hz=30psi. PID: MAP (pressure basline 14.7psi), MAP HZ (frequency), MGP Manifold Gauge Pressure (pressure base line 0psi) turbo boost

This would be a good one for somebody who's good with electronics. Make some sort of circuit with a toggle switch that outputs the idle frequency and the full boost frequency. You could fool the ECU into thinking that it has full boost right away and go ahead and inject more fuel. Put a microswitch on the accelorator pedal to engage it like this: