First, check all plugs and air filters.(including fuel filter by tank). Also clean your butterfly in your intake with a good cleaner and blue towels. Do this and reply back with your results.
change the plugs and wires
often times a rough idle can occur, in addition the speedometer and cruise control will not work.
not starting is a symptom so is running rough
A leaking fuel injector can cause a rich condition on one bank of the engine.
Check the EGR vavle
Spark plug wires? Coil pack? Dirty injector? Spark plug wires? Coil pack? Dirty injector? Spark plug wires? Coil pack? Dirty injector?
300zx twin turbo lots of black smoke and running rough
dodge is known for fuel pick up issues. the fuel sender unit has low voltage. change that and fuel filter. nnot an easy fix . because both are in fuel tank.
The Dodge ram 1500 rough idle can because by a bad spark plug or spark plug wire. The rough idle can also because by a bad camshaft.
Trail shoes are shoes for running in rough terrain. They are bulky and heavy I do not recommend running with them in places were there is not rough terrain.
Probably the catalytic converter. Have someone feel if there is any exhaust while you try to deep it running.
the check engine light is blinking and my 03 Nissan exterra is running rough