I have a 1972 Mercedes 280SEL 4.5 that, until recently, was running fine, but a couple of months ago it started chugging a lot and it felt like some of the cylinders weren’t firing. I just used a spark-measuring gadget and found out that at the spark-plug end of the ignition cables I’m getting only about 6kv of spark rather than the 20kv or so I think I’m supposed to get.
I just looked at a similar thread on this site concerning weak spark and the suggestions were a weak coil and/or old cables, but I replaced the coil and the cables, and the ballast resistor, two or three years ago. Are there any other possibilities? The car is almost 50 years old–could it be distributor points? Or anything else about the distributor? Anything else come to anyone’s mind?
You must be logged in to reply to this topic.