Following your link I read this: -
The amplifier produces a peak-to-peak output of about 200mV when the
microphone is held at arms length and is being talked into at normal
conversational volume levels
The link also said: -
1.5 to 3.3VDC supply voltage
Normal conversation at 1m (from here) is 50 dB SPL
A passenger car at 10m distance is 80dB SPL (also from same source) so I would expect an engine mounted microphone to receive at least 30dB more sound pressure (110dB SPL).
That's an SPL that is 60dB greater than normal conversation. If normal conversation produces 200mV RMS then a car engine mounted microphone might produce a voltage that is 1000 times higher (60dB is an amplification of 1000) and so your 200mV RMS turns into 200 V RMS and of course this is a completely impossible situation given that the the MEMs module you purchesd can run from 3.3 volts.
CONCLUSION: - YOU ARE TOTALLY OVERLOADING THE MICROPHONE AND AMPLIFIER.