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Found these to do to most likely solve the issue:
• Clean the MAF sensor. take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
• Inspect all vacuum and PCV hoses
• Inspect all hoses and connections in the air intake system
• Inspect and/or test the intake manifold gaskets for leakage especialy the Driver side.
• Check for a dirty fuel filter and proper fuel pressure
• Ideally you'll want to monitor short and long term fuel trims using an advanced scan tool
• If you have access, you may want to run a smoke test
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