I have a 1981 Datsun 120Y which very often has trouble starting in cold weather, especially after overnight rain. Even using the choke doesnt seem to work. I'm pretty sure the problem lies somewhere in the carburetor, but my dad suspects the ignition coil isnt making enough voltage for the spark plugs.
But then again I do notice my battery is significantly weaker in colder weather and the cranking isnt as strong. When I give it a jump start the engine would start almost all the time. I seem to understand that the weaker battery would cause the following (please correct me if mistaken):
- Slower cranking leading to weaker compression in the cylinders; air/fuel mixture doesnt burn properly
- Less voltage going to the ignition coil and finally to the spark plug; weaker spark doesnt ignite the air/fuel mixture
Anyone knows any other possible causes of this problem?
But then again I do notice my battery is significantly weaker in colder weather and the cranking isnt as strong. When I give it a jump start the engine would start almost all the time. I seem to understand that the weaker battery would cause the following (please correct me if mistaken):
- Slower cranking leading to weaker compression in the cylinders; air/fuel mixture doesnt burn properly
- Less voltage going to the ignition coil and finally to the spark plug; weaker spark doesnt ignite the air/fuel mixture
Anyone knows any other possible causes of this problem?