ok 13b s5 rx7 just replaced my main harness car runs when i first start the car it drives great but after only a few seconds car goes to **** will only let me go like 1/8th to 1/4 throttle anything past that car breaks up like it pulling alot of timing or something will break up shoot flames whatever car ran great before i swapped the main harness kinda lost if i unhook the maf car will idle but wont rev and unhooking my tps didnt solve anything either please help need to fix this thanks

 

sounds like the car is going to limp mode. is the oil metering pump pluged in? it is either unpluged or somethign is wrong iwth it

 

Check for engine codes and this might help to narrow down your problem.