Bertrand Daoust

I changed everything from the coils to the spark plugs
(coils, distributor caps, rotors, spark plug wires and spark plugs) on my 1991 S4 tonight.

It was not running very badly but had a vibration problem at 3000 rpm.
See this tread:https://rennlist.com/forums/showthre...ight=vibration
Thanks to everyone. Particularly to Dr bob and Mrmerlin.

Now it runs smoother than ever and has a lot of power. Now it's working like it should.

Many thanks to Roger from 928Rus for the excellent service and parts. He's the best!

the flyin' scotsman

I did same some years back but I went with Nology ignition wires...........what did you use Bertrand?

Bertrand Daoust

I used Bosch parts and the full Beru wires.

Mrmerlin

Cool, thats great that you found the problem, It would be wise to inspect the coil wires every once in a while to check for corrosion, sometimes they will get knocked off either the cap or the coil and then this is enough to let moisture into the connection, i have see this happen on more than a few cars