Diagnostic Aids
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- Verify the integrity of the air induction system by inspecting for the following conditions:
- A restricted or collapsed air intake duct
- A misaligned air intake duct
- A dirty or deteriorating air filter element
- Any objects blocking the air inlet screen of the MAF/IAT sensor
- Any water intrusion in the induction system
- Any contamination or debris on the sensing elements of the MAF sensor
- Damaged components
- Loose or improper installation
- Any air flow restriction
- Any vacuum leak
- A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 2-6 g/s at idle to 100 g/s or more at the time of the 1-2 shift.
- Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories .