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XJ XJ8 / XJR ( X308 ) 1997 - 2003

Running rich , map sensor fault?

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Old 11-02-2018, 11:11 AM
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Default Running rich , map sensor fault?
Is that true?
 
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Old 11-02-2018, 12:49 PM
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Maybe, but it could be the MAFS, high fuel pressure, leaking injectors, slight misfires, and some others that I haven't heard about.
 
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Old 11-02-2018, 02:55 PM
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If your running rich its either what RJ posted or you've got an air leak (vacuum or otherwise) which is causing the ECU to richen up the mix. That in turn can mess up your O2's...are you getting a code?
 
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Old 11-02-2018, 04:46 PM
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Usually a dirty MAF sensor. Clean only with MAF sensor cleaner, be careful not to bend any pins, and then tighten all of the hoses between the Throttle body and air cleaner; check the air tube for tears.

And you car is a ?
 
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