Waynes3232

My 2000 Grand Cherokee has started to make a rumble and engine shaking once started. I thought it was only while taking off at first but it now has started even when idle. I first thought U joints but they and the CVs are good. It all started after I did an oil change and put in new spark plugs. I rechecked the plug gap and set them to .035. Has anyone else seen this before?
oh sorry this is 4.0L engine

zs&tas

You most likely knocked something like the crank sensor plug when changing the filter . Other wise make sure you got the correct firing order after doin the plugs . Maybe broke a lead when changing plugs ? .

Waynes3232

I hope I understand what your saying about the plugs (but please forgive me if I'm wrong). I have the straight 6 4.0L that has a rail coil pack for my plugs, I did recently change the crank shaft sensor incase it was bad, as well as the transmission position sensor, transmission mount and fuel injectors, also put in a new fuel pump, im trying not to throw anymore unnecessary parts at it if possible. Any ideas why it's still doing this?