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944 S3 aka 944 to 968 drivetrain engine conversion

 
Old 04-16-2016, 08:41 AM
  #16  
MN
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I love my 78 m22 hybrid. Haven't had it to 150 but at 3200 rpm 110 mph it's a real trip.
Sometimes one get lucky and the Autobahn is fairly empty. (My 928 is in Germany.)

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Old 04-18-2016, 04:58 PM
  #17  
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Originally Posted by MN View Post
Thanks.

I have a hard time finding the diagnostic port on PET. Would you know where to look or know the part number?

MN
If you want the connector go to ebay and look for losangelesautoparts and contact them. They have a few 968's in the yard. Tell them I sent you.

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Old 04-20-2016, 11:59 AM
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go to ebay and look for losangelesautoparts and contact them
Contacted them. Thanks for the tip.
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Old 04-20-2016, 11:02 PM
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Originally Posted by MN View Post
Contacted them. Thanks for the tip.
You are quite welcome
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Old 05-07-2018, 03:53 PM
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Originally Posted by Fronkenstein View Post
So if anyone wants a full pinout of the DME connector and all the gory details including the wire colors here you go:

944 S3 wiring change chart (PDF)

944 S3 wiring change chart (Excel)

I found a very important missing bit of info. It seems DME pin 27 requires Term 15 power aka switched +12V. This is provided via the 14 pin DME connector that is under the dash on the passenger side. It is used primarily to provide the diagnostic port access to the DME. However pin 7 of that connector goes to DME pin 27. The wire at pin 7 is black.

Without power to pin 27 the DME is only half awake and it will appear as though you have a bad DME relay. Then after jumping the relay, testing crank position sensor output all is good. So you check for switched ground at DME pin 36 (pin 85 DME relay) and it fails and the finger points at a bad DME.

I wasted a lot of time chasing that. I should have read all the pin definitions on the DME. Anyway it all works

Hopefully it will help you out and you won't go through what I went through. Story at 11 can be found here

Fronkenstein
I know the thread is a couple of years old now, but many thanks for this! Just spent a fortnight scratching my head, how I missed this when I went through the wiring diagrams, I don't know. Looked at it again today, jumpered across to terminal 7 on the T1 14 way connector, and it fired up straight away. All I have to do now is figure out the best way of neatly putting in the extra cable... Also, whilst fine to prove it running, I am not entirely happy with the wire from the ECU to the ignition amplifier in the S2 loom - it is a 1mm shielded rather than 1.5mm wire of the 968. Perhaps an 8v engine bay loom might be better?

Many thanks again, for saving any more head-scratching!

Tref.
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Old 05-07-2018, 04:34 PM
  #21  
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Default Let me know if you figure out a good speedo solution

I have all the 968 ABS fired speedo pickup but haven't got around to figuring it out. If you do please share here. Glad the thread was helpful!

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