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2004 Chevrolet Colorado Question: with sea foam in the vacuum smoke came out the top of heat shield?P0171code



MasYo, 3.5L 5 Cylinder, Guymon, OK, April 04, 2013, 06:13

Just after I had glass packs muffler put in and cut off and turned down the following days had a reduce in power and little of a rough idle where's The best place to startlooking for tha problem?

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  • Answer #1

    April 04, 2013, 18:50

    Are the converter(s) still on and in original location? Changing backpressure will affect performance.

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