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Vacuum leak effects on MAFS g/s
Can a vacuum or false air leak cause low MAFS g/s readings thus causing high or above normal fuel trim. Typically if the engine has a vacuum leak, the fuel trims would be high at idle. I know for a rule of thumb g/s on a good mass air flow sensor should read 1... Login to read more. 
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| Engine | 4.0 L |
| Trans | 5-speed Automatic (Electronic) |
Vehicle Data
2008 Nissan Frontier SE 4.0L
| Engine | 4.0 L |
| Trans | 5-speed Automatic (Electronic) |
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