Ok so I went to the junkyard and got a replacement ECM get home and connect it. I then go for a five minute drive around my block. The same thing is happening!!!!!

When I goto give it gas it will hesitate, when I step on the gas hard I will get a back fire out of my intake only. What gives here? Replaced Fuel pump like 3 months ago I am developing whip lash from this car please help!

For backfiring, hesitation, and no power I'd be looking at the plugs and doing a compression check. Lots of things could cause from swapped plug wires (computer can mask a lot) to burned valve, bent valve, broken key in crank (balancer turning). Really need a complete check out with proper tools.

Could it be Cat converter? I have had converters go before but never acted like this. I do however nitice that could be a major issue in the Bonnies.

Its an '89 Bonnie

Well, I put my hand near the exhaust and it'* sputtering at idle. I am also getting horrible gas mileage.

Ok, don't get annoyed for wasting eveyones time... I figured out the problem!!!!!!!! Yahoooo!!!! Anyway I had a cracked spark plug wire. So I took one off my other car to see if it was the problem and sure enough!! Thanks everyone for all the help and I apoligize for taking up your time!!!

Never have to apologize for having a problem you can't figure out. Just don't give bad advise. I am glad you figured this out. Now go get some Taylor 8mm wires in the color of your choice and change them out.