Rough Idle

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Idles rough only when cold,,, was pulling code PO174, replaced MAF, and since still drops a heart beat at idle first thing in the morning at 60 degress or below, otherwise runs like a champ, have recently replaced wires, plugs, Lower O2----- what next?

Visitor

in Mesa AZ

Jan 13, 2011

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What are the best Chevrolet repair shops?

RepairPal Certified shops can diagnose and repair your 2003 Chevrolet Silverado 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

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Rough Idle

What is your question?

Visitor

in Mesa AZ

Jan 13, 2011

1 Reply

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Honeston Jan 13, 2011

that code could be a possible vacuum leak, possibly at your intake manifold... very common on that engine

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Popular Answer

What are the best Chevrolet repair shops?

RepairPal Certified shops can diagnose and repair your 2003 Chevrolet Silverado 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.