Question about 1987 Porsche 944

2 Answers

1987 Porsche 944: Replaced Alternator, New Battert, will not turn over with key but will tow start. When ignition is turned on most of the electrical system operates except: No Oil pressure registering, no Power seats, No Wiper Blades operation and No turn signals. Now after sitting 24 hours, the "Brand New" battery is drained!!! Recharging battery right now, Please tell me how to gain access to the ignition and unplug connector.

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  • laura_belle0 Jul 05, 2010

    Will Lokk into the posasible grouind problem, but still would like another opinion. Plus could I get a diagram of how to get to the ignition switch?

  • laura_belle0 Jul 08, 2010

    Well...Replaced Ignition switch...all electrical systems are functioning, EXCEPT, the engine will NOT turn over. You can hear the fuel pump working, but no engine turn over...Now what??? Again, you an drift start w/ clutch and it runs. just can't key start. Please tell me where to go from here. THANKS, again.

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  • Porsche Expert
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Hello! Ignition switch is defective...It is behind the steering wheel...Pull off cover by hand...Loosen nut and remove wheel...Remove mounting screws...loosen steering column Switch...Remove trim...Disconnect plug...

www,rockauto.com (as an example) sells a new switch for $50...

let me know how you make out.......Guru...........Saailer

Posted on Jul 05, 2010

  • David Burbee
    David Burbee Jul 08, 2010

    Hello! Give me a minute and I'll get back to you...Saailer

  • David Burbee
    David Burbee Jul 08, 2010

    Hello! In many instances, as cars age, more than one problem will happen...Cause and effect...Now that a good ignition switch is installed...Lets find the no start...Look at the starter motor...You can trace the + battery down to the motor...One of three items is is at fault...#1...A voltage drop is on the + cable to the starter...#2...Poor ground to the chassis...#3...The start lead (Red/Black wire; Smaller gauge) is open or resistive....

    Lets eliminate...When the key is turned to start there should be +12 volts on the Red/Black starter lead...Next...Set your volt meter on the lowest scale...Positive probe to center of the + post on the battery...Negative to the Large + cable on the starter motor...Your measuring across the + cable...Turn the key to start...You must read less than .06 volts...Do the same test on the negative battery cable...+ probe center of negative battery post...To the outside metal case of the starter...Key to start...Must read less than .03 volts............Last test...Set meter to X1 ohm scale (X10) if meter doesn't have a X1 scale...Put one probe on the negative battery post...The other on bare metal of the body...Must read zero ohms...Leave probe on the - battery post...Other probe to bare metal of the starter...Must read zero ohms...

    This will bring the problem to light....Any questions, feel free to ask...I am here! saailer


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  • Porsche Master
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Any ground problem there, check all wire connections "from" and "to" ignition switch , fuse panel and this devices harnesses. Tell us news.

Posted on Jul 05, 2010

  • ZJ Limited
    ZJ Limited Jul 08, 2010

    Check the fuel pressure regulator, just cause there is fuel present, doesnt mean it
    has enough pressure to start/run:
    - Fuel Pressure Regulator possibility
    - Check the Fuses, are they all good?


    If this its ok, need to find out what signals the injectors on, computer problem
    perhaps.

    Probably not the fault but did you change the DME relay with your spare
    or make the 3 wire? DME Relay Information and Testing

    Keep in touch.

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