[964Cab]

I too have water leaking into my 964 and the 993 Cab through the door weather striping
and getting too close for comfort to the $$$$ DME brain under the driver seat. Here is how I cured the
water leak. I bought 3/4" foam weather striping from Frost King (sold at every Home Dept, etc) It's
3/4" wide foam striping and 3/16th thick and comes in 17 feet rolls. Part number Frost King V4498. Take it and
use weather strip glue to secure all along the edge of the door frame (not the body frame where the stock factory rubber crap is). Do the door frame with no cuts from door window edge till the "A" pillar door lower edge. After doing
this I had no more water leaks.

Thanks,

Patrick

PS: Upon reading some more Porsche service tech manuals that the dealer factory techs use I found that the DME relay lives and breaths as a function of what the DME "brain" does. For example, upon starting the car the DME brain sends a ground short signal to the DME relay pin # 85. Once that DME relay pin # 85 is grounded that in effect closes another coil in the DME relay that sends a positive + voltage to pin 37 of the DME "brain" unit. That + positive voltage keeps the DME brain firing pulses to the ignitor system that feeds the coils that feeds the twin dist. Sooooo, if that DME relay is hiccuping in any way then the DME brain gets messed up and that in turn screws the engine performance up big time !

Above noted "hicupping" could be caused by any number of things such as false positive air bag signal, false positive anti theft signal, etc. In effect the DME "thinks" the car has crashed and kills the + voltage signal to the "brain" and also kills the fuel pump. Also, the DME "thinks" the car has just been stolen and disrupts that positive + voltage to pin 37 of the "brain" and shuts the fuel pump off as well as halts the firing of DME brain sequential pulses to the ingnition "ignitors" that feed the coils. So many false positive signals cause so many problems that the DME brain just halts operation.

Patrick

PS: I'm curious if an after market ignition system (MSD ?) could provide a more reliable sequental sync pulse to the ignitors so they can feed the coils and the twin dist in a fashion which could provide more enjoyment for us 964 owners (no offense Porsche).