Question about Kia Spectra

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My plug wires keep fouling up. changed three sets in two months. The keep going bad. Possible cause.

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Plug wires could go bad because they are being sprayed with a conductor, like oil with carbon in it; or it could be the voltage is going to high, such as from spark plug gap too wide. Make sure plug gap is around .032".

Posted on Sep 28, 2010

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Hello...I have a 2009 chevy cruze 1.8L ,some 3 months ago,the car had some pulsating and vibration during driving , so I changed the spark plugs and the problem was solved, but after about a month,the car...


Was any of the previous spark plugs fouled? Dirty? If so you need to investigate whether the problem is oil or fuel causing the fouling. Also a possibility is that you have a bad plug wire and when you changed plugs you disrupted the plug wire enough to make contact. Now possibly the plug wire is showing too much resistance causing a misfire at idle. Only way to be sure is to have the car scoped to see if the wires are proper or defective. That is unless you are the change parts and try type. In that case try a new set of wires. The reason is because at idle the voltage is not as high as it would be at higher rpm.

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Are they fouling out? Too much fuel making them load up? Or is a weak coil causing them to fail when the car sucks in more fuel under load?

Have your coil tested at a parts store or take it to a mechanic and have it given the once over.

Leaky injectors could be fouling them out too. If you coil checks out you may want to pull the injectors and have them leakdown tested.
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The problem is more than likely going to be rings if it smokes all the time.
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