AutoZone 1997 Cadillac Seville STS 4.6L SFI DOHC HO 8cyl | Repair Guides | Engine Electrical | Firing Orders | Firing Orders | AutoZone.com

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    1997 Cadillac Seville STS 4.6L SFI DOHC HO 8cyl

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    Ram B1500, B2500, B3500, 1999-2003

    Firing Orders

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    Fig. 3.9L engine Firing Order: 1-6-5-4-3-2 Distributor rotation: Clockwise



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    Fig. 4.7L engine firing order Distributorless ignition



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    Fig. 5.2L and 5.9L engine Firing Order: 1-8-4-3-6- 5-7-2 Distributor rotation: Clockwise



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    Fig. 5.7L engine firing order Distributorless ignition



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    Fig. 8.0L engine Firing Order: 1-10-9-4-3-6-5-8-7-2 Distributorless ignition system



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    Fig. 3.9L engine Firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise



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    Fig. 5.2L and 5.9L engines Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

    Before carrying out extensive tests to isolate poor running problems, check connections of spark plug wires. This is especially important if plugs, wires, distributor, etc., have been disturbed recently for service. Obviously, this is not applicable to the wireless 4.7L engine.


    NOTE
    To avoid problems, remove and tag the spark plug wires one at a time to ease reinstallation.

    For vehicles with an extensive service history, keep in mind that the distributor 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 very important that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations.



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    Fig. 2.5L Engine Firing Order: 1-3-4-2 Distributor Rotation: Clockwise



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    Fig. 3.9L Engine Firing Order: 1-6-5-4-3-2 Distributor Rotation: Clockwise



    Click image to see an enlarged view

    Fig. 5.2L and 5.9L Engines Firing Order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise



    Click image to see an enlarged view

    Fig. 4.7L Engine Firing Order: 1-8-4-3-6-5-7-2 Distributorless Ignition



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    Fig. 8.0L Engine Firing Order: 1-10-9-4-3-6-5-8-7-2- Distributorless Ignition

     
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