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    VWVortex


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    Thread: Newly Bought 1987 Audi 4000CS Quattro

    1. n00b
      Join Date
      Oct 24th, 2011
      Location
      Kansas
      Posts
      5
      Vehicles
      1987 Audi 4000 CS Quattro
      06-14-2012 11:50 PM #1
      Hey guys i newly bought a 1987 Audi 4000cs quattro. The car is tornado red with 139,000 miles. Everything works, and is pretty clean thoroughout. The only thing is this idle problem. The car starts up and runs, but runs rough and when given gas, it cuts out. I am looking into a fuel filter first. The car runs so its not the fuel pump. Possibly clogged injectors???? Worst case scenario is i need to rebuild, clean or replace the fuel distributor, hopefully no tho.... Any ideas or suggestions would help. Also this is my first audi that i have bought( mom owned many and driven most of hers), what should i look for as to things to go wrong or break at this point in time? Thanks everyone. Will post pics soon!

      Drew

    2. n00b
      Join Date
      Jun 18th, 2012
      Location
      Los Gatos
      Posts
      4
      Vehicles
      1983 Coupe GT, 1981 Coupe GT, 1987 4000KQ
      06-18-2012 05:29 PM #2
      Look for Vacuum leaks as there should be a few, if not many, also try cleaning the idle "De"stabilization valve (sic). also just make sure the plunger in the underside of the fuel distributor is free and clean. Was it being driven or had it been sitting for awhile as its critical that these get driven....

    3. n00b
      Join Date
      Oct 24th, 2011
      Location
      Kansas
      Posts
      5
      Vehicles
      1987 Audi 4000 CS Quattro
      06-23-2012 06:50 PM #3
      hey ok thanks i will look for leaks. Um as far as i know, the kid drove it with the cv joint broke for a while in 4wd, then he ran into his house one day and the car just cut out. Then i believe he said that it sat a month or so, but he claimed he started it once every week to keep things moving.

    4. Junior Member RADOinVA's Avatar
      Join Date
      Jul 4th, 2008
      Location
      Colorado
      Posts
      96
      Vehicles
      2001 Audi S4 SOLD 1994 URS4 1993 UrS4 (parts car)
      08-06-2012 02:31 PM #4
      Hello,
      My name is Joe, bought a 86 4000CS Quattro last week and so far so good, it unfortunately didn't have any records with it and the odometer stopped at 136K. really have no idea of the mileage.
      Seems to run really well, with a little rough idle at start up, but generally idles fast at about 1500 RPM??? Do you have any suggestions for the power windows in these cars? Mine dont work and I understand this is a common problem with these cars. Is it normally the switch or the motors, wiring or all the above? thank you in advance for any help you can give me.
      Joe

    5. Member Jazzydub's Avatar
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      Oct 13th, 2009
      Location
      Snohomish WA
      Posts
      4,160
      Vehicles
      JB 20th 0440, 1987 Audi 4kq, 1998 Yukon, 1969 Datsun 2000
      08-06-2012 11:56 PM #5
      I would look for vacuum leaks. Mine is hard to start when it's cold and idles funny. The differential lock doesn't work and I can hear a leak behind the switch as well as by the rear of the car. My power door locks also don't work which I believe is controlled by vacuum.

      I think it's a switch problem with my windows. The fronts work fine. The rears don't work from the front but do from the back. I got one back window to roll down with the front switch but couldn't get it to go back up. If none of them work at all from any switch I would check fuses for power to the switches/motors.
      Bring back our SuperSonics
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    6. Junior Member RADOinVA's Avatar
      Join Date
      Jul 4th, 2008
      Location
      Colorado
      Posts
      96
      Vehicles
      2001 Audi S4 SOLD 1994 URS4 1993 UrS4 (parts car)
      08-07-2012 04:28 PM #6
      Thanks for the suggestions, I pulled the pass. driver window switch and replaced it with one I had save from a while back and EUREKA!! It works now. back windows are still not operational as well as the sunroof. Going to check and replace all fuses.

    7. Member NummerEins's Avatar
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      Feb 15th, 2010
      Location
      Noblesville, IN
      Posts
      276
      Vehicles
      2001 A4 Avant
      08-26-2012 09:45 AM #7
      It would not hurt to "seafoam" the intake and clean out the idle air control valve.

    8. 10-23-2012 08:21 PM #8
      may be your fuel pressure regulator.if it runs fine when engine is warm.

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