so i did a t2 s5 swap to my N/a Gtu.... do i need to change the cpu as well b4 the car will start??? or can i still use the old NA one

 

umm is your car s4 or s5? either way yes i believe you do

 

either way you have to change your ecu. If you did a S4 TII swap you must get a S4 TII ECU N333 or N332. If you did a S5 TII swap you must get a S5 TII ecu, cant remember the #.

 

No i mean the CPU not ECU.. the cpu is located on the left side under the driver.... my car was a s5 na and i put a s5 t2 in it

 

The CPU is the body computer. You use the CPU based on what interior harness is in the car.

S4 interior harness= FB01 or FB05 CPU
S5 interior harness- FC01 or FC66 CPU

And your bump has been deleted. Bumps are forbidden here in the 2nd gen RX-7 technical section

 

No you don't have to change the CPU. it controls the horn and other stuff that you would think could just be run by just a switch. it still controls all that stuff just fine when the new emissions harness is in place.

 

o0o so that dont control the engine??

 

The ECU controls the engine. It is located under the passengers foot rest/fire wall.

The CPU is the body computer that controls things like Horn, and warnings, and brake lights and turn signals. It is located in the drivers kick panel.

 

but i thought that the cpu is part of the engine management.....
i mean my engine wont start.....it got spark and gas but yet it wont start and its definately burnin the gas.... its like the engine is confuse

 

Do you mean you smell gas? That doesn't mean you're burning it.

 

i am actually burnin it cause theres smoke comin out of the exhaust