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Originally Posted by p76rangie
Have you actually removed it to test it. The vacuum advance only makes a difference at cruise.
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Not so. The vacuum advance only operates on the initial opening of the throttle plate on EFI engines, then the mechanical advance takes over.
The method to check the mechanical advance is to remove the distributor cap, rotate the rotor, in the running direction and let go, an it should move back to the rest position. There whould be about 35 degrees of movement of the rotor. Facing the engine, the timing pointer and marks on the fron pulley are at about 2 oclock. Timing at idle should be 8 degrees BTDC.
