I did my spark plugs last weekend (NGK Laser iridium part number 6994). Now im in manual mode as always. I am in 2nd gear and my speedometor for the rpm's is hitting 4 to 5 i know thats more stress on the engine but I got a little bit of shaking which I never got before. Do you know what could be happening here ? Could it be the spark plugs ?

I was going to buy a torque damper which would leave less stress on the engine and the motor mounts

 

Just to make sure it wasnt because of the spark plug installation I will re do the installation tonight ! Ill update here after. Still if anyone has any ideas as to why it was shaking let me know thanks in advanced

 

If it walks like a duck, looks like a duck, and quacks like a duck, chances are.... since I can assume that the car was OK before the plug change, I'd say it's a safe bet that there's something amiss there. I'm not sure how you could not have re-installed the coil packs properly (for one thing, I don't think the cover plate would go back on), but it kind of sounds like "a plug wire is off" (or in this case, the equivalent). Bad plug? Longshot, but never say never. I'm sure you'll let us know what you find, so good luck.

 

Yes thats what I was thinking as well. Im going to do the spark plug installation again tonight. Hopefully it goes well. Im still going to purchase a torque damper which will help

 

are they the right spark plug heat range wise? just wondering to hot and the plug overheats and cant maintain firing and it could cause a shake.

 

how do I figure that out ? I did buy the right plugs ngk laser iridium and they say that they come calibrated already, not to touch the electrode. MMMM now u have me wondering im just thinkin to buy another set and let a mechanic do it. I dont think it could be the motor mounts right ? its a 2005 with 55k what u think ?

 

So I got two new tires in the front and a front wheel alignment. Did not stop the shaking. I feel the shaking right by the acceleration pedal. The only part that I know of which is right behind it the the rear engine mount. While driving and punching it to get 4000 rpms thats when it shakes, then going over 4000 it stops. Motor mounts hold the engine while in motion, so thats why im thinking this. Any ideas ?