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Old 10-11-2021, 12:55 PM   #5
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jpc763's Avatar
Join Date: Aug 2014
Location: Fort Collins, Colorado
Posts: 345
Originally Posted by blue62 View Post
So with the Durametric you can check the MAF voltage and g/s.
Go into the engine module then click on actual values.
that will bring up a list of things.
Find MAF voltage.
with ....Key on but engine off..... MAF voltage should read 0.9 - 1.1 volts.
With .....engine running at idle...... MAF voltage should be 1.2 - 1.5 volts.
Let me know when your back at your car.
I will hook up my Durametric to my car and give you some running g/s figures to look at.

You can also buy a vacuum gauge for around $25.00 and I can tell you how to connect it and do a proper vacuum test with it.
If you decide to purchase one let me know I will point out the correct type.

Tell me how the car runs... do you notice anything different since the codes came up????? Does it idle correctly and at the proper RPM????
Are you using a stock air filter or is it after market????
I am back home and just checked MAF Voltage

Engine Off - 1.01 v
Engine Idle - 1.31 v

I saw other MAF values in the list.

I have no problem buying a vacuum gauge. If you can point me to a good one I can get one and then follow the instructions to test it out.

The car runs great AND there does not appear to be any difference since the codes started appearing. Upon startup it can idle rough ~600 - 1000 then settles in at around 800 RPM (based on the notches on the gauge being 200 intervals).

I am using a MAHLE Air Filter - It was changed probably 2 years ago.

Thank you so much for your help!
2001 Boxster S - Midnight Blue Metalic
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