The times they are a-changin’. With apologies to Mr. Dylan, the ignition timing of your 4x4s engine is pretty well set. Ignition timing is what is used to make sure that the distributor fires ...

And the timing setting at idle is known as initial timing. A-timing curve is the rate at which timing advances with engine rpm. See All 8 Photos ...

1. When enthusiasts set ignition timing, they’re usually referring to base timing, or the timing without any additional advance based upon engine rpm or vacuum.