Distributor rotation for 1987 Audi 4000 CS Quattro

Huw Powell audi at humanspeakers.com
Mon Oct 26 09:53:05 PDT 2015

Mostly to reiterate what others have said:

The distributor rotor turns clockwise when seen from above.

The cylinder are numbered 1-5 from the front.

The firing order is 1-2-4-5-3, as indicated on the head.

At TDC by the crank, the rotor will either point to the #1 plug wire or 
180 degrees away from it.

To get true TDC, the "0" mark on the flywheel (crank locator) will be at 
the straight edge in the hole in the bell housing, and if you remove the 
oil fill cap, you will see the front two cam lobes both sticking "up" 
symmetrically perpendicular to the plane of the head.

Put the #1 wire there then proceed clockwise with #2, 4, 5, & 3.

After reassembly set the timing to about 6 degrees BTDC for stock 

Then, since your backfiring will still be happening, fix all your vacuum 

Finally, I dug out, tested, and offered to sell to you a good used 
coolant reservoir (and radiator fan) many months ago.  You did not 
follow through and I put them away.

All the best,


On 10/26/2015 10:44 AM, David Vanden wrote:
> Does anyone know or have a diagram of the distributor rotation for a 1987 Audi 4000 CS Quattro?  I don't know which cylinder plug wire connects to which location on the distributor.  I tried assembling it like the old one and it continues to hesitate and to back fire horribly.  Which is why I changed the plug wires in the first place.  The timing is still all off.
> Anyway if someone knows the arrangement please tell me.  Assuming I might have had it right the first time and it back fired anyway, does anyone know what the problem might be?  Electronic ignition?  Ignition Coil?
> Finally, if anyone has an expansion tank in good shape for this car I would like to get it.  Let me know.
> Dave
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