Hello please help me. My 2013 dodge dart with 148k miles shakes bad at idle and rests below 1000 RPM at idle. The steering wheel shutters and you can feel the whole car vibrate on idle. I’ve changed both the upstream and downstream 02 sensors. Also changed the MAP sensor. Anytime I roll windows down the RPM decreases further below 1000 and the headlights dim. If you hold break down and push gas pedal in to get RPMs above 1000 the shaking and vibrating goes away. Any further suggestions please. No check engine light or codes stored after changing 02 and MAP sensor.

 

Try changing the plugs. Clean the throttle body and check motor mounts.

 

Okay Jkeaton I’ll give that a go