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Bad spark plugs can have a variety of effects on the performance of your car's engine. Signs of bad spark plugs include a rough idle, engine hesitation, hard starting, check engine light illuminated with a DTC P0300 and reduced engine power.

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Q: What effects can bad spark plugs have on your vehicle?
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What causes spark plugs to stop firing?

No spark from coil, bad plug wires, or bad plugs.


Will bad spark plugs cause an engine to burn oil?

No, but burning oil will give you bad spark plugs.


Why is your 2000' Hyundai Tiburon misfiring?

Misfires are commonly a result of bad spark plugs or the wires connecting to your spark plugs, There is a spark plug for each cylinder of your vehicle which affects your cars ability to start and shift up in gears, depending on which plugs aren't working.


Have a idle problem with a 98 windstar 3.8idles good when cold idles rough and stalls when warm works fine when driving?

The most common reason for a vehicle to run rough when it is cold is bad spark plugs or bad spark plug wires. Change the spark plugs and spark plug wires.


What is a coil and how does a bad one effect a vehicle?

A coil is what gives you spark it distributes the power to your spark plugs so it would run bad or not at all check for spark. The coil produces the power for the spark to ignite the fuel/ air mixture in the combustion chamber of the engine . The distributor systematically distributes or places that spark to the spark plugs in the firing order .


Can bad spark plugs cause your car to lose power and backfire in the intake manifold?

having bad spark plugs could effect how the spark sparks and when it sparks. new plugs is never a bad idea


Whats wrong with your 1990 Chevy lumina if the spark plugs are not firing?

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Do bad spark plugs have to do with charging the alternator?

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Will a bad alternator cause new spark plugs to smoke?

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