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Mike V.
Mike V., Auto Service Technician
Category: Car
Satisfied Customers: 20375
Experience:  25 years of experience, Certified Subaru Technician and Nissan factory trained.
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suzuki forenza: 2006 suzuki forenza 2.0 coming up with a P0300

Customer Question

2006 suzuki forenza 2.0 coming up with a P0300 code, changed out plugs, wires and coil pack still same problem
Submitted: 1 year ago.
Category: Car
Expert:  Mike V. replied 1 year ago.
Greetings phillip and welcome to JA! I will do my very best to assist you with your problem.Does the engine run rough at idle?How many miles on this?
Customer: replied 1 year ago.

yes it runs rough at idle and it has 160.000k

Expert:  Mike V. replied 1 year ago.
Ok, I would check a couple of things with this.First, with the engine running spray some carb cleaner around the intake to check for vacuum leaks. If the idle smooths out or the idle speed increases, then you know there is a vacuum leak at the manifold.Next, I would check the timing belt. With that many miles, it's possible it may have jumped a tooth or two and that can cause the problem.If this all checks out good, then try pulling the O2 sensor out of the exhaust ahead of the converter. If the idle smooths out, then there is a blockage in the converter that may cause this issue.Hope this helps!Please be sure to let me know if you need further assistance. If not, please be sure to rate my answer.Thank you.

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