Quote:
Originally Posted by proporsche
I would start with that ,to do that you have to go to pro Porsche shop or anybody who has a gas analyzer to set your fuel mix....this is the basics, before you start trouble shooting...
If that has not been done on your 911 you might have to remove AFM and remove the factory plug.Under there is a adjustment screw to correct the fuel mix...
look here 
Also to set the correct fuel mix you have to measure before catalyst-if you have one on your 911...and oxygen sensor disconnected..which you can actually leave disconnected -i do not know how is in Finland with smog tests every 2 years? |
Oh ok i had never heard about this. Has it something to do with carbonmonoxide levels in the exhaust gases or why is it called CO adjustment? Why does it have to be adjusted now? Has the engine wear reached a point where it is necessary to get proper fuel to air ratio? Why do i have to drill the AFM? Is this an unofficial hack or is it in the factory maintenance manual? Sorry for so many questions but i am absolutely clueless and you seem to be an expert regarding 911 3.2's, absolutely golden information so far!
And my 911 does not have a catalyst or oxygen sensor so that makes the procedure a bit easier.
By the way, today was very rainy day and the misfires came back. They weren't as bad as before and stopped at about 50⁰C oil temp instead of 70⁰C as was the case before the motronic adjustment.