markdjr

That would be it! 

 

It's so **** dorky, but I just love reading this stuff.  Just in the quick browse of the engine booklet, I now get why my coolant fluctuates between high noon and just past noon when I have the HVAC system completely shut off - even in relatively cool ambient temps.  I would be idling in 60 degree weather with the HVAC system totally shut off and watch the coolant slowly rise, fans kick on, coolant goes down, fans shut off, rinse and repeat.  But, everything was rock steady with the AC on.  Searching the issue revealed plenty of posts stating "it's normal," and "it's not normal."    Well, now I know it's designed to work that way.  Most cars smooth out the engine coolant temp to prevent the unsuspecting driver from freaking out, but I'm glad to see Porsche didn't do that.  

 

I also had no idea the alternator was liquid cooled.  This site rocks!

I've been struggling with this issue myself.  My Cayenne was ALWAYS steady at 180, but it has recently fluctuated between 180 and about 220.  I have talked with the dealer and they have explained the same as the above quote, that it is normal and in spec.  That doesn't explain the change in my personal experience and from owner to owner on here.  I have been thinking of replacing my thermostat, thinking that perhaps it is working but not perfectly.  The dealer has talked me out of it thus far, but I'd prefer to have my car go back to the steady 180.

I was wondering if it was possible to adjust the dampening of the air suspension and the speed activated lowering of the suspension? I know you can adjust suspension height via PIWIS as opposed to a module, is it possible to make comfort more comfortable? Also, I would like to drive in terrain mode on the freeway, any way to eliminate or change the speed of the auto lower? It looks like the new renntech module may do the latter, I can't confirm, but perhaps there is another way? Thanks for any info.

Thanks for the reply, but I am specifically looking for the difference between do it yourself and send it in. Are they modifying different files, using a different tool than the dimsport MyGenius provided by FVD?

I am looking into the various ECU tunes available. I am leaning towards FVD due to price and the DIY nature of the flash. I am wondering if there are any compromises by doing it this way. What is the difference between FVD's flash and a company like Evoms where you send in your ecu? Thanks.