Ignition timing should be set at 10 degrees BTDC (before top dead center), with vacuum advance hose disconnected and plugged, engine idling at 800 rpm or less.
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Align the engine timing marks at TDC (TOP DEAD CENTER). Distributor timing should be number one plug at 10 degrees BTDC(Before Top Dead Center). Distributor rotor button should point to number one plug wire on distributor.
SOURCE: timing spec for 1988 Ford Mustand 2.4L
5 to 7 degrees before top dead center with distributor vac line plugged off. chris
SOURCE: I need to know the timing specs on a 86 ford f150
unplug vacuum advance on the distributor. seal the hose and put a plug on the advance there should be a noticeably deeper groove in the harmonic balancer where the 2 marks should meet up when the light hits them.
in ex. (10 degrees btdc)
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