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  1. #1

    Default misfire...can someone help me out

    i have a 1997 5.7 silverado 4x4 i decided to replace the distribuator cap and rotor, upgraded to 8.5 mil cables, and went with oem spark plugs, after installing this my truk started to miss fire can anyone help me troubleshoot this form wat i know the firing or is 1-8-4-3-6-5-7-2
    and that all the order of the sparkplugs are odd on the driverside the furthest one being #1 and the passenger side are all even the furthest one being #2 maybe im wrong idk would appreciate any help thanks

  2. #2
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    mfleetwood's Avatar
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    Based in the info you provided, your firing order seems to be correct. However, you may want to double check, so I pasted a like below that will help you confirm it.

    When you say "OEM spark plugs" what brand are you referring to and are you sure you have the right gap?

    http://autorepair.about.com/library/...-firing-97.htm


    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

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  3. #3
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    If its missfiring what cylinder is it at? Have you checked the distributer and rotor to make sure they were reinstalled at the correct poistion. Do you have all the wires going to the correct cylinders?
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  4. #4
    Sr. Mechanic Ethan's Avatar
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    Default

    Replace the ignition coil, it's like $40 for a performance one, and are you using Platinum plugs? If you're using copper top it'll melt those things and can cause a miss.
    1994 Chevy Silverado 1500 Ext Cab 350 cuin TBI in dark Chevy blue
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    MSD Street Fire Performance Ignition coil

  5. #5

    Default

    When you say "furthest", do you mean furthest from the distributor? #1 and #2 are at the front of the engine.

    ---------- Post added at 08:17 AM ---------- Previous post was at 08:16 AM ----------

    Quote Originally Posted by Ethan View Post
    Replace the ignition coil, it's like $40 for a performance one, and are you using Platinum plugs? If you're using copper top it'll melt those things and can cause a miss.
    Are you saying using copper plugs in this truck will cause them to melt?
    When you hear hoofbeats, look for horses not zebras.

  6. #6
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    Quote Originally Posted by 2COR517 View Post
    When you say "furthest", do you mean furthest from the distributor? #1 and #2 are at the front of the engine.

    X2 we need a bit more info, or furthest from the Firewall.
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