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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

2005-12-11 17:07:49
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Q: Why would your truck vibrate and idle rough after you changed the spark plugs?
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Related Questions

Why the engine feels rough after changed the spark plugs?

the transmition ,is probably not adjusted to the spark plugs,or their not the right spark plugs

Does bad spark plugs give you a rough idle?

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.

Why does your car vibrate when it accelerates?

as a result of bad spark plugs

Why does a Chrysler Pt cruiser Idle rough after new spark plugs?

Maybe when they put the spark plugs in they were not gapped right or they maybe the wrong spark plugs.

What do old spark plugs do to a car?

Old spark plugs can make a car misfire, run rough, and not fire at all.

How do you know spark plugs are bad?

Poor performance, hesitation and rough idle could be signs of worn out spark plugs.

Why does your 1995 Mazda 626 idle rough and hesitate on acceleration?

Change the spark plugs and wires... Change the spark plugs and wires...

1997 Dodge Intrepid is idling rough have changed plugs. but still idels rough?

Spark plug wires? Coil pack? Dirty injector? Spark plug wires? Coil pack? Dirty injector? Spark plug wires? Coil pack? Dirty injector?

Will bad spark plugs and plug wires make your car vibrate?

Yes, bad spark pugs or plug wires can cause the engine cylinder to misfire which will cause the engine to vibrate.

Changed the spark wires spark plugs and distributor cap now car will crank but not start?

Check/replace Rotor Check for spark at plugs

When do the spark plugs and wires need to be changed on a 2005 Dodge Grand Caravan?

I would replace the spark plugs after 50K, the wires and plugs again at 100K.

How often do you change the spark plugs on a 03 350z?

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.

Where are the spark plugs on a 1999 mercury courger?

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.

How do you change spark plugs on a 2003 explorer 4.6?

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.

How often should spark plugs be changed?

30000 miles

Do spark plugs need to be changed to get turn signal to work?

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.

How often should spark plugs be changed in a 02 Mitsubishi eclipse gt?

Once on 1-2 year on regular spark plugs. Once every there years on High end spark plugs.

Where are the spark plugs on a 1999 mercury couger?

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.

Valve noise after spark plugs are changed on 2000 Malibu?

wrong plugs or wrong gap!

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.

Why would 2003 cavalier vibrate when started and continue vibration when driven?

Try changing spark plugs. Blow out dirt around plugs first.

Why does your car shake and drive rough?

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.

What if i changed your spark plugs in my 2001 alero and now your cars laggin in low gears?

either wrong spark plugs or sparkplug gap or you have to plug wires on wrong plugs

What causes rough idle on 1995 Tahoe after changing spark 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.

Why does your Mazda 6 keep chugging after you changed your spark plugs?

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.