Question about 1987 Audi 5000 CS

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Have a 1986 Audi 5000 CS Quatro that will crank but not start..

Have a 1986 Audi 5000 CS Quarto that will crank but not start. Thought it ws the fuel pumpo, but changed the pump with a new bosch pump and still does same thing...HELP!!!!!

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  • Anonymous Dec 16, 2008

    we have found its the ground....any idea to bypass the ground....

  • Harry Ta Apr 25, 2009

    My Audi 1986 5000S is having similiar issues. We have replaced fuel pump with new Bosch and still no fuel. How do I check for spark?

  • colin white May 11, 2010

    have you checked for a spark ?



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I have repaired this problem several times.Excessive resistance in the ignition wire connectors can cause this condition. Easy cure, high resistance plug wires. I know it can't be that easy, but it is! Audi had recall rearding this problem. If you are haveing other problems, go to all data online and look at the technitions help tips. There an ancer for almost everything. Hope this helps.

Posted on Apr 30, 2009

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The ground? You'll have to be more specific. There are several grounds involved in starting the car. Whichever it is, it'll have to be repaired. This repair should be fairly simple -- replace the broken cable or clean the connection, then replace. There's no way to bypass the ground. Let me know which ground it is, and I'll try and look it up in the repair manual, and give you some tips on how to track it down and fix it.

Posted on Feb 22, 2009


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