I was getting the following codes for my car and my car was having power cut. It seems like every time I try to put a good load on the car, power would just get cut and the car would buck. So I ran the procedure to pull the CEL codes.

Here are the CEL codes I was getting- 11,13,18,26,27,34

So I had the following replaced because some things needed to be replaced and I figured I might as well take care of the things related to the CEL as well since I'm already getting work done on the car.

TPS (NEW)
Intake Thermo Sensor (NEW)
Intake Gaskets (NEW)- Due to vacuum leaks
Turbo/Exhaust Gaskets (NEW)
MOP/OMP (Used One)
Pressure Sensor (Used One)

After replacing these things, the car still has has the same problem with power cut. It's like the RX-7 never left limp mode and still cuts power when I put a load on it. Immediately when this happens, the CEL light comes on and stays on. When I turn off the car and turn it back on, the CEL light goes off until the problem happens and it turns back on. Any ideas and/or possible solutions to the cause of this problem? Any help is greatly appreciated.

Car Info
1991 RX-7 TII (Original TII- If that makes a difference)

 

When the S5 OMP goes bad it usually damages the ECU so if that were the case then replacing just the OMP is not going to solve the problem. The limp mode is a decision made by the ECU and not the OMP itself.

 

Just to give an update. Ran the CEL codes again and I only have the following now.

26,27 and 34

Anyone know where I can get another S5 ECU (N370)?

 

Don't mean to highjack the thread, but I'm having the same problem. Is there any way to check or test the ECU without having to actually replace it?