I'm having the infamous 3,800rpm issue where the car will not pass 3,800. I've seen people take care of this issue by grounding out some pins on the ECU. I was wondering if anyone knew how to do it or can show me a link on how to do it.
Thanks in advance,

 

Pins 2C, 2R, 3A and 3G are all grounds.

 

so do i just cut them and ground them?

 

Or you could fix the grounds...

 

You tap into them and ground the tapped wires.

 

where are all the grounding points around the engine? is it better to fix them or simply ground them from the ecu?

 

go nuts: Proper RX-7 Grounding Procedures

 

If you tap into the ECU grounds, you can run the extra connections to the chassis around the same area.

The main sensor ground is on the top of the engine, underneath the intake manifold.

 

I grounded the ecu pins (3G, 3A, 2R, 2C) and now the EGI comp fuse keeps popping! any idea why? did i not find a good ground?

 

You have an S4? What color were the grounded wires? Black? Pin 3A is in the smallest plug top row far right position. Pin 3G is in the same row 2nd from the left (three to the left of 3A). Are these the two wires from plug 3 you grounded?

 

i have a 10th ae ''S3".. not all of them were black.

 

The 10th AE is an S4. And pin 2C is found in the medium sized ECU plug and located at the top row second from right. Pin 2R is at the bottom row far left position. And if they weren't Black then what specifically were they pin wise? As in 2C was? 2R was? and so on.

 

the color for the wires are

3G = Green with Black line
3A = Black with White line
2R = Brown with Red line
2C = Blue with Red line

 

Did you use the directions I recently gave to you to make sure you were choosing the correct wires? The only B/W wire in plug Three is pin 3I (opposite end of the plug from pin 3A) which powers the ECU from the Main Relay!!!! The plug diagram is read from the back of the plug.

 

this is what i have

 

alright, i think i know what happen.. if the majority of the wires are suppose to be black with a color line, then i was reading it backwards.. I was reading it from the front of the harness not the back, That's why all my colors are all F up! im about to switch it and see what happens..

 

You grounded the voltage wire from the Main Relay, a wire for the rear primary injector, Boost Sensor and the Switching solenoid.

 

yeah, that was the issue with it, it's all running again now. I still have some issues going over 4k, but i think that's the secondary injector going bad. Thanks for all your help! the only thing that got damaged was a bad fuse.