just wondering what might be possible causes of this. if new spark plugs are put in it will run fine for a bit until those get fouled up with a black soot (cant really say its oil), and the engine will eventually die unless you keep the revs up. when reving it up it will blow a black smoke.

 

What kind of vehicle? TPI?

 

Your code 44 is No signal from distributer to ECM. I got the same code but i'll let you know how it turns out

 

Code 44 means lean oxygen sensor reading.

 

Even though your getting a lean signal to the ecm your plugs are telling you rich. Most likely cause is a misfire from the ignition. Could also be a bad o2. How log has the code been on?

 

Engine type would help steer you in the right direction. In any case, check fuel pressure. If MAP system, check for vacuum hoses disconnected.