Cleaning or replacing the Mass Air Flow Sensor is necessary.

Joined
Mar 22, 2012
Messages
3,508
Location
Berks County/Pa.
Unless its some weird placebo affect -- I can notice the engine and transmission response on older vehicles that I have personally driven. Replacing with OEM or using a dedicated Mass Air Flow Sensor cleaner really well.
 
yes, if it's dirty. i cleaned mine at 60k miles and it looked perfectly clean. sprayed it off anyway and noticed zero difference.
 
Yep, no Placebo. Even about 2009 I remember doing it to my Eldorado & the 300 Ponies really ripped afterwards. 🤣
 
You could word that a bit better but yes, if it's dirty then actual air intake > sensed air intake, resulting in a (potentially correctable) lean condition. Check the long term fuel trims. This can also depend on the fitness of the upstream O2 sensors, though when talking about older vehicles, multiple deviations from the ideal running state may exist.
 
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