Dodge Grand Caravan 3.3L Engine Vibration

[IAN442]

I did a tune up on my 3.3L Dodge Grand Caravan only to find the engine is vibrating heavily. This tune up included a new coil pack, plugs and wires.

I did happen to notice a separate thing when looking at the Crankshaft Pulley that it seemed to be wobbling while the engine was running.

Any assistance would be greatly appreciated.

[Scotty89]

If the vibrating started after the tune up then I would say you got a bad part somewhere, whether it is a plug or maybe a coil. I am wondering though if the check engine light is on or not?? If it is misfiring it should turn the light on. I have seen many crank pulley have some slight wobble to them. I have considered it normal.You have a layer of rubber between two pieces of metal, its going to move some just from the pulses of the engine.

[Crvett69]

it possible you got 2 of the wires on the wrong plugs, check the firing oder and check your plug wires if you didn't have the vibration before the tune up. its also possible you have a incorrectly gapped plug or bad plug

[IAN442]

Thank you for responding...

I installed a new coil pack, new wires, and new Bosch pre-gapped plugs.

Today i noticed an unburnt fuel smell but I checked the spark plug wires and coil against the manual.

1 3 5

2 4 6 is the order of the cylinders.

3 1 5

2 4 6 is the order on the coil.

i removed all new plugs looked for cracks in the insulator and then went and cleaned them before re-installing them. i made sure everything clicked in terms of being connected and then fired the engine back up and got the same results.

I think my next two steps are to try the original factory coil pack, and then different brand plugs perhaps NGK.