Possible wires installed wrong or plugs not gapped properly. You don't say what kind of car so I cant tell you the firing order. Check you put the right wires on right plugs. ALSO- If you have a timing light or access to one- Check timing! If it was timed/tuned with old plugs for several years (it happens, my smog guy does it to pass me), then it might have been changed to accomodate the old plugs wearing down. Plus a hotter burn/spark will automatically change your compression and therefore your whole burn sequence. I put in 'fancy' platinum plugs in my Bronco once and it refused them, running terrible. Had to put in new 'old' type plugs and ran perfect. Go figure. Dokter Denney
the transmition ,is probably not adjusted to the spark plugs,or their not the right spark plugs
Yes. Bad spark plugs, bad spark plug wires and a bad distributor cap are the common causes of rough idling. If it has been a while since you changed these components, do so.
as a result of bad spark plugs
Maybe when they put the spark plugs in they were not gapped right or they maybe the wrong spark plugs.
Old spark plugs can make a car misfire, run rough, and not fire at all.
Poor performance, hesitation and rough idle could be signs of worn out spark plugs.
Change the spark plugs and wires... Change the spark plugs and wires...
Spark plug wires? Coil pack? Dirty injector? Spark plug wires? Coil pack? Dirty injector? Spark plug wires? Coil pack? Dirty injector?
Yes, bad spark pugs or plug wires can cause the engine cylinder to misfire which will cause the engine to vibrate.
Check/replace Rotor Check for spark at plugs
I would replace the spark plugs after 50K, the wires and plugs again at 100K.
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.
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.
It is important to replace car parts after so many miles. Spark plugs are changed by disconnecting the batteries, the spark plug cables, removing the spark plugs, replace them with new spark plugs, reconnecting the cables, and the car battery.
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.
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.
wrong plugs or wrong gap!
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.
Try changing spark plugs. Blow out dirt around plugs first.
If your car is shaking it could be poor suspension alignment can cause a car to shake and vibrate, and other possible causes are bent or worn suspension parts, old tires, bent wheels and bad brakes. If your car sounds especially rough at speed, the problem could lie with the car's spark plugs and wires. Spark plugs fire more frequently the faster you drive, and the engine will sound rough when they begin to fail.
either wrong spark plugs or sparkplug gap or you have to plug wires on wrong plugs
they could be bad spark plugs as in not a very good brand. or maybe you didn't put the wires back on the right spark plug.
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.