Hello All - I've been away and have not enjoyed the forum in a long while.
DM6 distributor on the an early production BJ-7 was removed for refurbishing, upon installation the engine cranks but only produces sporadic backfires through exhaust and carburetors. It refuses to fire suggesting incorrect installation to some original position or orientation. However, the distributor was slotted into correct position (2 o’clock) with pulley notch timing marks aligned and piston TDC confirmed. Distributor HT / LT wires were checked and correct for firing order. Static timing was set which confirmed an electrical connection but the spark between points appears to be weak.
The engine was running fine before the dist was removed. Another working DM6 (from a claimed 40k mile car) is on the shelf as a spare and could be used for troubleshooting. It was also used for visual comparison to the refurbished distributor – with the exception of the distributor drive spindle (where rotor installs) being 180 degrees from the refurbished everything is the same. Recall that the drive-dog allows for only one position for dist installation. Sometime this could be 180 degress from TDC. Is it correct to remove the distributor drive spindle, easily done on a DM6, turn 180 degrees and install, or does removal somehow effect timing?
The points, condenser, rotor and perhaps coil will be replaced today for another round, but I’m running out of options for troubleshooting. What are the chances that that the timing gear skipped a tooth and now affecting timing? I’m posting in hopes that as fresh set of ideas will help.
Thanks in advance (no pun intended). GONZO
DM6 distributor on the an early production BJ-7 was removed for refurbishing, upon installation the engine cranks but only produces sporadic backfires through exhaust and carburetors. It refuses to fire suggesting incorrect installation to some original position or orientation. However, the distributor was slotted into correct position (2 o’clock) with pulley notch timing marks aligned and piston TDC confirmed. Distributor HT / LT wires were checked and correct for firing order. Static timing was set which confirmed an electrical connection but the spark between points appears to be weak.
The engine was running fine before the dist was removed. Another working DM6 (from a claimed 40k mile car) is on the shelf as a spare and could be used for troubleshooting. It was also used for visual comparison to the refurbished distributor – with the exception of the distributor drive spindle (where rotor installs) being 180 degrees from the refurbished everything is the same. Recall that the drive-dog allows for only one position for dist installation. Sometime this could be 180 degress from TDC. Is it correct to remove the distributor drive spindle, easily done on a DM6, turn 180 degrees and install, or does removal somehow effect timing?
The points, condenser, rotor and perhaps coil will be replaced today for another round, but I’m running out of options for troubleshooting. What are the chances that that the timing gear skipped a tooth and now affecting timing? I’m posting in hopes that as fresh set of ideas will help.
Thanks in advance (no pun intended). GONZO