[DOCTORAUTO]

My 1992 240 volvo SW stick was bucking.Checked the distributor cap.Button was gone rotor burnt.Replaced plugs,cap,rotor.Felt real good for 20 mintues.Did I damaged the electronic control module.It still does it only now and then.Car has over 100,000 miles on it.Runs great until this.

 

[Black 850]

Does it buck only at low RPMs or does it do it at any RPM when it does it?
David.