The Ford Barn

AzRay · 01-09-2017, 08:32 PM

OK - This one is driving me nuts. Once my 1929 A warms up and is put under a load like driving up a steep hill I hear a very loud sound like a 'spark snap' which seems in time with RPM. No loss of power. If I retard the spark almost to TDC the sound goes away. Under a light load if I move the spark advance from TDC to full advance the sound gets louder. Once at the top of a hill the first time I rev the engine I get the same snapping sound. The second time the sound is less. The third time nothing! So whatever the noise is it's effected by the timing. TDC no noise. Full advance loud noise. New plugs, new plug wires (conductors), new points and condenser, new distributor cap and rotor, new coil and secondary wire. Any help will be much appreciated.

Thanks
Ray

01-09-2017, 08:32 PM	#1
AzRay Junior Member Join Date: Oct 2016 Location: Prescott, AZ Posts: 21	Snapping sound under load. OK - This one is driving me nuts. Once my 1929 A warms up and is put under a load like driving up a steep hill I hear a very loud sound like a 'spark snap' which seems in time with RPM. No loss of power. If I retard the spark almost to TDC the sound goes away. Under a light load if I move the spark advance from TDC to full advance the sound gets louder. Once at the top of a hill the first time I rev the engine I get the same snapping sound. The second time the sound is less. The third time nothing! So whatever the noise is it's effected by the timing. TDC no noise. Full advance loud noise. New plugs, new plug wires (conductors), new points and condenser, new distributor cap and rotor, new coil and secondary wire. Any help will be much appreciated. Thanks Ray Last edited by AzRay; 01-11-2017 at 08:19 AM.