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jcslocum · 08-29-2016, 06:11 PM

I think I have the later MAF in an older Box so I have found an older new unit to try and see if that fixes some of my readings. I did some data logging today but the screen grabs didn't work so I can't share that today. I have the excel log file and will work on charting it.

At idle my MAF reads right at about 15 kg/h. Once the A/C is switched on the MAF reading goes to about 18.5-19 kg/h. The idle RPM does stay essentially the same, right about 825 RPM. The car goes in for a safety inspection tomorrow morning so it can be registered here in MD from VA. Once that get done, I will put the new MAF in and take it for a spin and record the same stuff again.

I'm chasing a hard start when HOT situation. We think we have a vacuum leak that is making idle too lean which is shown by the readings. More work and more data to come.

Some really good logging info I have found:

http://www.6speedonline.com/forums/996-turbo-gt2/320625-durametric-logging-101-how-log-what-log-what-do-afterwards.html

08-29-2016, 06:11 PM	#17
jcslocum Project Addicted Join Date: Aug 2015 Location: Eastern Shore, MD Posts: 623	I think I have the later MAF in an older Box so I have found an older new unit to try and see if that fixes some of my readings. I did some data logging today but the screen grabs didn't work so I can't share that today. I have the excel log file and will work on charting it. At idle my MAF reads right at about 15 kg/h. Once the A/C is switched on the MAF reading goes to about 18.5-19 kg/h. The idle RPM does stay essentially the same, right about 825 RPM. The car goes in for a safety inspection tomorrow morning so it can be registered here in MD from VA. Once that get done, I will put the new MAF in and take it for a spin and record the same stuff again. I'm chasing a hard start when HOT situation. We think we have a vacuum leak that is making idle too lean which is shown by the readings. More work and more data to come. Some really good logging info I have found: http://www.6speedonline.com/forums/996-turbo-gt2/320625-durametric-logging-101-how-log-what-log-what-do-afterwards.html __________________ ______ Jon 1966 912, 1976 911 1986 944, 2000 Boxster Last edited by jcslocum; 08-30-2016 at 05:33 PM.