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Old 12-02-2012, 12:25 PM   #15
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A vacuum leak will generally go lean. You're going rich. That indicates either an air metering issue (bad MAFS) or something in the fuel system (sticking injector, high pressure, leaking Fuel Rail Pressure Sensor).
Knowing that will help narrow down the list of possibles.

Things like this can be tough and that's why we needed more info.
I'm confident we can get this sorted out. Will just take a bit of time and good scan tool with live data. Don't want you replacing good parts.

Posted from NAPA.
Don't "think outside the box".
There is no box.
Do it correct, or do it twice.
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