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the transmition ,is probably not adjusted to the spark plugs,or their not the right spark plugs
Check/replace Rotor Check for spark at plugs
I would replace the spark plugs after 50K, the wires and plugs again at 100K.
The spark plugs on a 1999 Mercury Cougar are located under the cover of the engine. The spark plugs should be changed approximately every 60,000 miles.
The manufacturer recommends that the spark plugs are changed every 30,000 miles. Many individuals have experienced a much longer life for the spark plugs.
30000 miles
The spark plugs on a 1999 Mercury Cougar are located under the cover of the engine. The spark plugs should be changed approximately every 60,000 miles or so.
No. Spark plugs have nothing to do with your turn signals. Try changing the turn signal bulbs. Spark plugs are only used for the combustion of the engine.
Once on 1-2 year on regular spark plugs. Once every there years on High end spark plugs.
wrong plugs or wrong gap!
Every time that a spark plug its changed, the new plug needs to be calibrated ( regularly at .45 ), sometimes the new plugs are not calibrated.
either wrong spark plugs or sparkplug gap or you have to plug wires on wrong plugs