MAFS
It will usually cause bucking, engine can ping/knock, run warmer, you can get Lean Codes.
MAF sensor is used by the computer to calculate the 14:1 air:fuel ratio.
If MAF says 14lbs of air comes in computer knows it has to add 1lbs of fuel to get 14:1
If MAF is dirty then it may report 14lbs of air when there was really 16lbs of air
So engine is running 16:1 ratio which is too lean, almost the same as a vacuum leak.
So engine can buck when trying to start off or accelerate, and a lean fuel mix burns hotter which can causing pinging/knocking, also warmer engine temp
O2 sensors tell the computer that engine is running lean, so computer adds more fuel but it has limits because a 3.0l engine can only pull in 3 Liters of air every 2 RPMs, so computer has a sanity check when MAF and O2 sensors are not confirming it's calculations.
Very simple system, don't over think it, computer is not smart, just fast at doing simple calculations
MAF sensor is used by the computer to calculate the 14:1 air:fuel ratio.
If MAF says 14lbs of air comes in computer knows it has to add 1lbs of fuel to get 14:1
If MAF is dirty then it may report 14lbs of air when there was really 16lbs of air
So engine is running 16:1 ratio which is too lean, almost the same as a vacuum leak.
So engine can buck when trying to start off or accelerate, and a lean fuel mix burns hotter which can causing pinging/knocking, also warmer engine temp
O2 sensors tell the computer that engine is running lean, so computer adds more fuel but it has limits because a 3.0l engine can only pull in 3 Liters of air every 2 RPMs, so computer has a sanity check when MAF and O2 sensors are not confirming it's calculations.
Very simple system, don't over think it, computer is not smart, just fast at doing simple calculations
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