Porscheke

Hello

I have a porsche 911 from 87 (so a 3.2 engine), which drives, starts perfectly.

Only when the engine is hot and I shut it down and leave the car for some 15 minutes.... it's very hard to start.

First attempt is always with no succes

Second attempt the engine starts after long waiting (± 10sec)

Does anyone here know what the problem could be?

Hope to hear soon

regards

Porscheke

Anyone?

Hello Richard

Thanks for the files

Altough I've done some more tests

Removed the plug from the motronic and measured some points inside this plug

First of all measured all grounding points:

2: OK

14: OK

19: OK

24: OK

Then I measured the 12V terminals:

18: OK (should be continuos 12V)

37: NOK!!!! here should be 12V after turning the start switch!

Done some further research and it looks like the alarm module (under passenger seat) is blocking the whole thing??

Done some tips a had from other lock/ unlock/ lock/ unlock.... the doors for resetting the alarm module but no good...

So I think my alarm module is the bad guy :angry:

Is there a way to solve this??

Restting the module, make a bridge between some connection,...

Any help would be great

Hope to hear soon

Regards

Porscheke

Hi Loren

I had contact already with Bosch so they told me that they didn't release it :angry:

My friend is a real electronic freak and told me , get the diagrams and I will repair that unit !! (because it's not "state of the art" , my friends opiniun)

So I guess I have to buy a new unit :unsure:

Hello Loren

Thanks for the reply, but unfortunally it's not what i'm looking for.

The diagram is a global schematic from the Porsche manual (volume 7)

What i'm looking for is the electrical drawings of the Motronic itselfs.

My car won't start and we suspect that we have a bad/ damaged Motronic (unit under seat)

Hope you have this diagram

Hi Loren

It's a 964 coupe from '91

Hello

Can anybody here help me?

I'm looking for the electrical (wiring) diagrams of a 964 Motronic

All info that I have on the Motronic:

0 261 200 473

964.618.124.02

911-MW-DZ-01

Hope to hear soon