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1996 Dodge Grand Caravan

Question: MIsfire when cold, runs fine at operating temperature

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fergusonsfour, 3.3L V6, Klamath Falls, OR, November 23, 2010, 15:41
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1996 grand caravan, 3.3L engine. Starts fine, idles fine. Begins to stutter, misfire, etc. at acceleration when cold. Runs fine, accelerates fine when engine reaches normal operating temp. Cleaned EGR value, no change in engine when unplug wiring from EGR solenoid. Thinking that its the selenoid or EGR air/gases temp sensor?

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  • Answer #1

    dandd November 23, 2010, 17:31
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     Master

    Sounds more like a bad coil pack. The EGR is not even supposed to be active when the engine is cold. But a a coil pack, wires and plugs have to work their hardest when the engine is old because it takes maximum voltage to fire the dense cold air in the cylinders.

    Any codes, any check engine light/service engine soon light on?

    Code 43 is an ignition primary circuit problem, which could be a bad coil pack. Code 11 is loss of Crank and Cam Signal, so I would be very suspicious of the Can and Crank Sensor.
    I would resolve those codes, disconnect your battery to clear the codes and go from there, but both of these codes will definitely cause misfire under load.

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    fergusonsfour, November 23, 2010, 18:03
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    Codes have shown up when pushed accelerator a few times, causing a misfire. 11, 12 43, and 55 most recent codes, when using ignition switch to check codes. 43 ignition coil related? Thanks

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