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Tahoe Running Rough

Discussion in 'Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)' started by Conlan Rose, Dec 25, 2012.

  1. Conlan Rose

    Conlan Rose Active Member 2 Years 1000 Posts

    Some mornings when I start the truck and it is cold she runs like absolute crap, others when it is equally as cold she runs like new. This has been the pattern for about 2 months. A month ago I replaced the plugs and she is running better but still rough and with a slight knock or tick.

    Today I filled her with half a tank of gas that was pure gas not 10% ethanol like I usually give her. The truck ran very well and even tho there was a slight knock it was much quieter. The noise makes its self more present around 2,000 rpm under that you can barely hear it. I don't know how to describe the noise but its there and quite annoying.

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