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I have two ELM327 bluetooth dongles and I got my vacuum reading from these devices. The problem with Torque Pro is it shows only data, but it doesn't record or give me an average of specific parameter, like vacuum or map sensor reading.
I read somewhere that if the fuel pressure is higher, because of vacuum leak from the fuel pressure regulator hose, we will have crappy mpg because more fuel dumped into the cylinders. This is one of the reason why I try to find more info about the Vacuum.
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