Map Sensor Question

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Jun 21, 2006 | 02:41 PM

lethal5point7

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From: Tucson, AZ

Map Sensor Question

Someone mentioned that the I should not rely on my Edge Attidude for the boost readings because it reads from the Map Sensor which does not register anything over 22PSI. Is there any truth to this? That would seem like an odd number for a map sensor to stop reading at to me, but I want to make sure because if I need to install a boost guage I want to make sure I do so..

Thanks in advance..

Jun 21, 2006 | 02:51 PM

PSNut

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From: New Hampshire

Quote:

Originally Posted by lethal5point7

Yes this is true. The MAP sensor starts shutting (defueling) the motor when it sees too high of
a PSI(above 22). U need a boost regulator installed in the MAP line near the MAP sensor amd then T in your boost guage line near the manifold. Actually i recommend the AIH delete fitting from Pure Diesel.
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Jun 21, 2006 | 03:06 PM

lethal5point7

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From: Tucson, AZ

Thank you!

Jun 21, 2006 | 03:12 PM

PSNut

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From: New Hampshire

Your welcome! Here's a LINK for a boost relief unit.
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Jun 21, 2006 | 03:47 PM

lethal5point7

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From: Tucson, AZ

Do you you know how high of a signal the map sensor puts out? That's what I'm curious to know more than what the computer does with the signal (IE cutting fuel at 22psi).

Thanks!

Jun 21, 2006 | 07:35 PM

cookie88

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From: Cabot, Arkansas

All the sensors that talk to the computer use a 5v. reference signal.

In the case of the MAP sensor, whent eh PCM recieves a signal above ~4.7v (approximately 24psi) it selects a leaner fuel schedule.

Jun 21, 2006 | 07:53 PM

stroker250

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From: Texas

I have the Bully Dog Outlook Monitor and it plugs into the map sensor and I read a boost pressure as high as 31psi. That's with the Bully Dog chip on the 75 hp setting. But sometimes my check engine light will comme on and then go off.