Pelican Parts Forums - Ignition Wires

From time to time, on my 1987 911 Carrera Cab I've had a little trouble with the #6 spark plug fouling. Cylinders perform well in the leak down tests so I've now turned my attention to the electrical system.

A few days ago, after detecting a miss in the ingnition, I removed the #6 spark plug connector from the engine. I had the engine running and was going to see if I could visually confirm a spark. As it passed my the air intake, a spark jumped from the side of the connector to the metal air intake. Upon further examination I realized that the plastic shroud that covers the point where the connector connects to the spark plug collapsed and the resulting air gap was providing a path for the electrons out the side of the connector.

So I replaced the connector and figured all would be well again. When I replaced the connector and started the engine, it still sounded like it was missing on one cylindar. When I placed my hand by the exhaust I could feel a slight puff, puff, puff instead of a steady exhaust flow. By this time it was dark outside and a I turned off a work light with the engine still running, I noticed a little spark coming from the side of the #6 spark plug wire and jumping onto the fan housing. So now I've completely taped that wire with electrical tape and have ordered a new set of wires. I'm thinking that they all might be marginal at best.

On the road, the car still seems to have a miss at low RPM's and is very slow to accelerate from a low RPM start. If I get the RPM's above 4,000 the car is like a rocketship. Even when accelerating from 2000-4000RPM its slow and then after 4,000 is like the car wakes up and takes off.

Wondering if there are other tests I can do or if people have other suggestions. I've got my fingers crossed that the new wires will do the trick.

Don