I have an 86 GT that i swapped a motor and trans from another 86 GT into and it was running okay before and now it barely tries to start. swapped computers from other car same vr1 computer. car will fire right away and then stall right away unburnt fuel is coming out of the exhaust and car has spark could a bad tfi do this everything is from the other car except the fuel system and i just changed to filter and the fuel pump is working good. 99% sure there is no vacuum leak, if someone could help me out that would be great. 86 GT cobra T-5 5.0 HO