I have a 1989 Mustang Lx with a 5.0L. I rebuilt the engine in September of 2010. its a standar bore 302 with edelbrock heads, a b303 cam and a gt40 tubular intake, also its a 5speed The car has run fine ever since the rebuild. Then one weekend it ran very poorly until it warmed up to temperature, its done this sever times, and now it runs bad all the time, its worse during acceleration than anytime. I have a new fuel pump and filter, fuel relays are new. I have new plugs, wires, cap, rotor, distributor, and coil, also timing is correct. I have checked my MAF sensor, my TPS, the Idle air control, i have changed my coolant temp sensor as well. my car as long as ive had it has never had O2 sensors. its ran fine for a year without them. When i unplug the MAP/BAP sensor there is no change in the idel or when i rev it up. Is it possible that its bad without causing the check engine light to come on? I have pulled the codes as well if anyone needs them here they are. my KOEO codes are 67 85 87. My memory codes are 14 22 29 33 41 51 66 97 91 95. please any help would be greatly appreciated. Im starting to get fed up with this car lol.