Question about 1987 Audi 5000 CS

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1987 CS quatro turbo

Problem 1 car won't start will crank over but won't start. problem 2 car after it warms up won't start for a couple of hours if you try to strat it w before it warms up it will start straight away problem

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  • geefy0 Aug 23, 2008

    I am having the same problem with a 5000 S non-quatro non-turbo. last year it would start when cold. If you turned it off and tried to start it while warm it wouldnt start. Let it cool for a few hours then it would start up fine. NOW it wont start at all and the diagnostics just give me 4444 (no faults found). I'm lost.


  • Victor Eastman
    Victor Eastman May 07, 2014

    I had the same problem just got fixed



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Yeah but it could be something as simple as the fuel injection fuse that looks like an extra fuse off to the side on the top i have an 87 5000 S quattro and i noticed it was missing a fuse the ******* wouldnt start for a month straight and when i replaced that fuse is ran awesome better than before

Posted on Jan 21, 2010

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Just did one of these. 1 Check for fuel at the fuel distributor or fuel filter (pass side underhood). Loosen the hose at the fuel filter and give it a momentary crank. Fuel spray = Good. Next tighten up the fuel line and give the key a crank for about 1-2 revolutions and stop - listen for fuel pump. It should run for a second or two. Next check the vacuum hose running from the main intake boot (over air cleaner) to the T at the center over the valve cover, next check the crankcase hose (driver side near motor mount). This is a goofy looking hose that starts out huge at crank case and goes back to about 3/4 in. These both tend to disintegrate and cause major issues with the CFI system in these. If the fuel distributor is not seeing full vacuum from the intake, it will not open and allow fuel to flow to the injectors. Do not be fooled by just looking at the top of the hoses, it is the bottoms that crumble and cause the hose to fail. The first one tends to collapse which is also bad.

Posted on May 30, 2009

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The hot start problem is because of a bad fuel pump check valve. no need to change the whole pump (expensive). the valve is only about 40 bucks from audi and fixes the problem completely.although it is tricky to change (in the fuel tank). Its worth paying a mechanic, should only cost about 200 or a bit less for labour, and you can find the part on your own.

Posted on Mar 03, 2009

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I had the same thing happen on our 1987 5000s and it turned out to be the fuel pump. I replaced the fuel pump and car was fine...until the next disaster.

Posted on Dec 10, 2008

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