starting and idling problem

[markm]

my mx3 has an extended crank when i start it up as if its not getting the propper amout of fuel provided to the cylinder. as if the injecters were cloged. it also has a very rough idle at times. i have change the o2 sensor, ignition wires, distributor cap and rotor arm, spark plugs and i dont know what else to do other than fuel injectors, distributor and some sensors. any one have any idea what the problem could be.

[markm]

i also have changed the fuel filter.

[Savin]

intake tube: Check for cracks
Injectors: Clean them (injector cleaner)
check to see if the crank angle sensor? is good. Its integrated into the disty. There's ways to check to see if your disty is good, just have yourself a good 'ol fashee-ond search.

[aufgehdraht]

marvel mystery oil its amazing put it in your gas tank and in your oil it will do wonders