Helo,
I am not so good in car tech.

Few days ago, I got the broken engine mounts replaced and Cam shaft sensor.

Then, I notice that the car jerks when idling. Looks like it is missing fuel or
not firing properly. It was worse when I reverse, the car vibrates more
when I apply brakes in reverse.
I took it to the dealer and mech advised to changing all spark plugs.
But, still the car keeps doing this ..........and no engine codes/warnings.

I dont know what to expect next when I take the car back to the mech.

Appreciate if some one can advise on what to check and expect.

Thanks

 

smell the exhaust...head gasket maybe??

 

check the egr.. your supposed to be getting a code.. but nothing is perfect.. unplug the hose between the 2 pieces of the egr.. see if it idles better

 

I tried to unplug both the rubber hoses between the two parts of the EGR...unfortunately it didnt change anything...

Hope some one has other ideas to try to figure out the mysterious right cause....