Hello all im new to the site. I bought a 93 z28 with the 700r4 it ran fine when i bought it. Now it just runs like crap....geting about 126 miles to the tank. The kid i bought it off of said he put the lt4 hot cam in it, egr and a.i.r delete, cat delete ,tb coolant bypass, beehive springs, and put a pcm for less chip in it. I took it to my shop a couple days ago and had them test my injectors and the wiring harness to see if that was it and they are fine. When they put the scanner on it, it was showing my oil temp was -40 (didnt know i even had a oil temp sensor) car was at temp when we seen that and the quad module 1 was faulty. My ses light doesnt come on unless im on the highway doing about 70 and it throws the code for the left bank running rich and the one for the engine running rich and no other codes. When the tranny is in overdrive if i push on the gas lightly the car shudders untill i push down on the gas to get it to drop down a gear. I only smell fuel comeing from my exhaust and not inside the car. when I let my car sit idiling in my garage I get ugly little carbon spots all on my floor from the exhaust tips. I repalced my plugs and wires about 4k ago and the opti 2k. It has a new timing chain and gears about 6k on them. And the tranny was rebuilt with a shift kit and corvette servo bout 7k ago. Fuel pressure is fine was at 42 with key on and 37 at idle. I have looked every where to try and figure out what the problem is. The egr and air seem to be tuned out as they are not throwing any codes. Im getting a 383 for it in a couple of months and i dont want any problems when i put it in. I know i need a new chip for the motor when i get it. But if this is something where my computer is fried then i want to get one before i put the 383 in. Gas mileage is killing me as this is my daily driver. If the computer is fried should i get another stock computer or should i get one of the standalone ones and have them just leave the air and egr out? Someone please help this is just driving me absolutly crazy, all these mustangs and imports where i live and i cant beat up on em with all the hp i have lost. And if someone could tell me what injectors i should use with my 383 it would be very much appreciated.