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Timing CHAIN
no
setting timing on a f150 4.9 6cyl
Yes.
2.7 has chain, 3.4 (6cyl.) has belt
3
10 degrees btdc
4cyl. engine does not have timing belt,6cyl timing belt and water pump should be replaced every 100k miles
4cyl chain, 6cyl belt
Computer controlled
The 1990 has a chain. The 1991 has a belt.
There isn't one. The distributor is synched to zero degrees with a scan tool, it can not be done with a timing light.