Had plugs, plug boots, vacuum hoses and ECM replaced. Also had catalytic converter removed and car will still not run. It will idle but can not accelerate.

I have been having this problem for awhile, when you go down the road about 2 miles and stop at a light, the engine acts like it is going to die. Then when you take off it tries to quit, i am at my wits trying to figure this out. One service station said it was the oxygen sensor, well I replaced it, but nothing. When it idles, the idle goes up and down then it finally stabilizes, also the oil light keeps on coming on, i know that it has oil, it just got changed. Can someone help me?

engine is straving for fuel, it seems, i took it into the shop and they couldn't find anything wrong. But there is soemthing wrong, what it is exactly i haven't found a solution to this problem yet anyhow.