Online firing diagram for 1990 caddy sedan deville front wheel 4.5?
To avoid confusion, remove and tag the spark plug wires one at a time, for replacement.
If a distributor is not keyed for installation with only
one orientation, it could have been removed previously and rewired. The
resultant wiring would hold the correct firing order, but could change
the relative placement of the plug towers in relation to the engine.
For this reason it is imperative that you label all wires before
disconnecting any of them. Also, before removal, compare the current
wiring with the accompanying illustrations. If the current wiring does
not match, make notes in your book to reflect how your engine is wired.
4.5L and 4.9L EnginesEngine Firing Order: 1-8-4-3-6-5-7-2 Distributor Rotation: Counterclockwise
Hope helped with this (remember rated this help) Good luck.
GO TO THE LINK FOR YOUR INFORMATION.
http://autorepair.about.com/library/firing_orders/bl-fo-9641.htm
90 CADILLAC 3.5 FIRING ORDER
You will need a chilton book try oriellys auto parts store.
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