E30 Distributor Cap And Rotor Replacement

According to most service manuals replacing the distributor cap and rotor together are recommended on most domestic and imports every 50 000 miles at a minimum. During routine tune ups which happen every 25 000 miles the distributor cap and rotor are often inspected for. In this case the firing order on the 325 is 1 5 3 6 2 4 what this means is the voltage from the coil will travel through the distributor down through the rotor and when the rotor turns to the number 1 cylinder contact on the distributor cap it sends the voltage down through the spark plug wire to the spark plug which in turn ignites the.