2005 Chevrolet Colorado Q&A

2005 Chevrolet Colorado Question: We replaced sparklugs but engine is still misfiring. Why?

We used platinum spark plugs that the auto parts store recommended. A friend recommended radium plugs. What is the difference? -
Answer 1
post eng codes that can be read by auto zone for free. DO NOT BUY MISC PARTS TILL YOU GET PROPER DIAG. -