Quote:
Originally Posted by ctbear
It is under Vehicle Management, Troubleshooting, Function Structure
Then expand the tree for Engine, intake, intake pipe pressure. You can then run the test plan for the intake pipe pressure which will display all 3 sensor readings.
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Did another inspection of all intake components and the crankcase ventilation pipe from the valve cover, did not find any visible causes for leaks other than the connection to the intercoolers. They have some slight blowby residue.
Unfortunately I had already cleaned the sensors beforehand so didn't have a before set of values to compare but went ahead and setup ISTA and did a check of the MAP sensors (after cleaning) and found that the charge pressure sensor was varying +/- 1.5 hpa (1029 to 1033 hpa) whereas the manifold and ambient pressure sensor where dead steady at 1030 hpa with no variation. Does this mean that the charge pressure sensor is on its way out? Is it worthwhile to replace it with a new one? Car has done 75K kilometers to date.