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Maintenance, Troubleshooting and Diagnosis Need help? Having troubles with your GT? Need some maintenance tips? Ask your questions here.

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Old 07-19-2010, 07:28 PM   #1
J_McCann
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Default Code 22

1993 mustang gt. CEL came on and code reader said code 22. I looked it up and it was a MAP sensor issue. Will a bad MAP sensor cause bad fuel ecconomy? I don't get/know what the MAP sensor does on these MAF cars.
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Old 07-19-2010, 10:38 PM   #2
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http://en.wikipedia.org/wiki/MAP_sensor
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Old 07-20-2010, 12:11 AM   #3
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Thanks Chris...I saw this and was gonna retype a few paragraphs from this book http://www.amazon.com/Ford-Injection.../dp/0837603021

It shows testing and troubleshooting procedures. I don't own a scanner though.
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Old 07-20-2010, 01:37 AM   #4
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i know what a MAP sensor does in a speed density car but what does it do in a MAF car?
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Old 07-20-2010, 10:25 AM   #5
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It becomes a BP (Baro) sensor and measures barometric pressure.
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Old 07-20-2010, 11:37 AM   #6
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would a bad MAP/BAP sensor cause poor fuel economy and for the car to run rich
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Old 07-20-2010, 08:41 PM   #7
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http://www.stangnet.com/mustang-foru...re-sensor.html

In my opinion it would since it is comparing barometric pressure to fuel tables in the computer and adjusting from there. This link has a pretty good discussion of all the associated problems. They also explain it better than I ever could....
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Old 07-20-2010, 09:04 PM   #8
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On MAF systems, this sensor gives the ECM info on changes in altitude. Vac leaks can set this code. You can also check the sensor itself by seeing if the sensor will hold vacuum.
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