P0201 from Durametric
This is latest in my ongoing MAF code since my rebuild. Also shows P2611, P3311.
Car is 2002 986S, with a recently rebuilt engine, catless mid-pipes, and 987 air box. New Bosch MAF. P0201 Porsche fault code 115 - Mass air flow sensor below limit value P2611 Porsche fault code 356 - Multiplic. mixture adapt. lower load range B.1: P3311 Porsche fault code 358 - Multiplic. mixture adapt. lower load range B.2: Also has a idle variation from 650 to 800rpms. I tried to find a vacuum leak using a smoke machine to no avail. Have replaced a few worn hoses to the AOS and TBI. Just over 500 miles on engine. Attempted to have it smogged, rejected for OBD evap and second air inop. Any thoughts on what to do next? Thanks. |
Using your Durametric tool, go into the DME section -> Actual values and check the MAF voltage:
key on engine off: 0.9 - 1.1 volts with engine idling: 1.2 - 1.5 volts Your MAF is OK if within these parameters. Regards, paul... |
Maf
The idling volts is in that range, I didn't check engine off. I did notice 2-3 volts when on the gas.
Thanks |
Did you use all the 987 air box including the tube the holds the MAF? If so check the ID of the original and the 987. If the 987 is larger it will though off the CPU.
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I was under the impression that this system could learn and adapt to changes such as this, apparently that is not the case. I got some bad intel it seems. Oh well. My MAF tests at .9 volt key on, 1.3-1.5 at idle. Should be fine. I currently have the 987 MAF that came with the used box in there, just to try something different. Now I will put the new one back it and test it for volts. I also just installed a temporary restriction, to reduce the tube diameter inside the housing before the MAF. It's snowing again today, so I have to wait to road test this. My car also has Cal emissions, I wonder if I should just go and get it flashed for ROW? |
I think you can keep the 987 air box, check out wayne's article on motor swap he had the same problem. Pelican Technical Article: Boxster Engine Conversion Project - 986 Boxster (1997-04) - 987 Boxster (2005-08)
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I think you can keep the 987 air box, check out pelican parts motor swap article, Wayne had the same problem.
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I also checked the systems status, and all but 2nd air are pass, which is enough to get me through a smog check here. I don't know why it shows fail on 2nd air, I hear the thing run every cold start for about a minute. |
Quote:
http://986forum.com/forums/performance-technical-chat/34226-secondary-air-system-surgery.html |
Smog: PASS
I passed the smog test today. :dance:
I removed my restriction and replaced it with a much smaller one, car runs great again. So happy to be done with this pain. |
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