Heavy Engine Vibration at 900, 2k, 3k. Just replaced front moto + trans mounts. DMF?

[flete25]

I had a similar issue...I checked the coils and 3 of them were cracked .I replaced them along with the plugs and problem was solved.

[dmboxster]

I'll give replacing the all the plugs and the coils. The car's got 90k on it and I doubt the coils have ever been replaced. If this doesn't work then I'll try the DMF.

[BYprodriver]

Originally Posted by dmboxster

I'll give replacing the all the plugs and the coils. The car's got 90k on it and I doubt the coils have ever been replaced. If this doesn't work then I'll try the DMF.

If a coil is not performing right you will get a misfire code for that cylinder. My 2000 S has it's original coils.

[bekks]

Can I please be reminded what a DMF is?

[alynch]

Originally Posted by bekks

Can I please be reminded what a DMF is?

Dual Mass Flywheel

[dmboxster]

Originally Posted by BYprodriver

If a coil is not performing right you will get a misfire code for that cylinder. My 2000 S has it's original coils.

That’s a fair point and it definitely didn’t fix the issue, but now it’s got new coils which can’t hurt.