Weak spark on number 1 and number 4 spark plug
- Thread starter BJM68
- Start date
Hi,
You didn't say if you have given the engine a complete tune up, or when it was done.
The spark plug wires could be old, and power doesn't go through some of them well.
2 spark plugs could be old and not working good.
If the spark plugs are new, 2 could be defective and not work right.
The contacts in the distributor cap could be corroded, and not letting power through.
The ignition points could be burned, and need filing or replacing, and the gap set right.
You didn't say if you have given the engine a complete tune up, or when it was done.
The spark plug wires could be old, and power doesn't go through some of them well.
2 spark plugs could be old and not working good.
If the spark plugs are new, 2 could be defective and not work right.
The contacts in the distributor cap could be corroded, and not letting power through.
The ignition points could be burned, and need filing or replacing, and the gap set right.
Peter Person
501 Club
Cubs use copper core plug wires.
Maybe your current wires are carbon core and the carbon is cracked in the two wires showing weak spark.
Maybe your current wires are carbon core and the carbon is cracked in the two wires showing weak spark.