Yes either the ignition module or the distributor pickup.
They will need to be checked , because they are most likely to cause that problem.
When you install the new distributor, line up the vacuum advance in the same direction as the old distributor was pointing, rotate the shaft so the rotor will be pointing approximately in the same location as the #1 spark plug terminal, then slide the distributor into the engine. The angle of the drive gears will cause the rotor to rotate slightly and the distributor slides all the way into the engine. Replace the distributor hold down clamp and nut, but do not tighten.
Start the engine and use a timing light to adjust the timing to specifications (typically 6 to 10 degrees of advance with the vacuum advance hose disconnected and plugged at 550 to 650 rpm idle speed).
Tuesday, November 24th, 2009 AT 11:02 PM