misfire #4 and random misfire

[dogdog130]

my gf bought this car while i was over sea for me and she got it deliver to are house and been sitting in the garage well i drove it for the last 2 days now it been running rough it i thought from it sitting maybe the reason but it still doing it any ideas i need this car running asap for a job interview

[StellarAuto]

How long has it been sitting in the garage and how full/empty was the gas tank?

[dogdog130]

empty i put some midgrade in

[AnthonyCeli]

I've had a misfire for months no one can figure out the cause...

[StellarAuto]

Hey dog, I assumed this vehicle was brand new. Is this incorrect? Is the check engine light on/flashing?

[dogdog130]

it flashes i checked plugs 3 were white and 4th plug had black grit crude all over it clean the plugs off good and still doing it

[dogdog130]

Also noticed alot of oil near the plug

[StellarAuto]

1. What year is it?
2. What engine code does it have.
If the chk engine light was flashing and one plug was black sounds like that coil might be bad and it's dumping raw fuel into cat causing light to flash.

[dogdog130]

2000 i dont remember took it to advanced auto, so try new coil but would that make the oil on the coil

[StellarAuto]

The oil is probably from a slight leak @ spark plug tube seal. Could be coming from coil (if it broke open). Say you have an engine code P0304 (cylinder #4 misfire). Swap that cylinders coil w/another (say cylinder #3) and see if the problem follows (turns to engine code P0303). If that is the problem may also want to replace the spark plug if it is to severly fouled.