I don't know what is wrong with this 86 560 SEL. When I first got the car it was shaking pretty badly at idle. I put the best gas possible and it went away, now its back and worse. The car shakes like a diesel (I can clearly see the star move side to side) when accelerating it hesitates, but the strange thing is that as soon as the temperature reaches 80C it stops, but most of the time the car never gets that hot. Someone told me that it's the spark plug wires, but to me it seems like a fuel delivery/injection problem. If anyone has had the same problem or has any idea on where to start troubleshooting it would be appreciated.

Thanks

Jerry

 

I have a similar problem to this guy could be distributor,leads,plugs,......seeing as youv been waitin since 2004 i dont hold out much hope here