Ok, I got a question and I hope someone can help me out. obd2b (2001) ecu for manual is 3 plugs and automatics are 4 plugs. Is all the plugs the same on the first 3 plugs for BOTH automatics and manual ecus? What is the last plug in the automatics use for and is there some wires on the 4th plug of an automatic wiring that is needed in manuals? Please help me out.
I'm asking bc I recently did an auto to manual swap in a 01 LS and I'm trying to swap to an obd1 ecu and I'm having problems reving pass 6K rpm with the obd1 ecu but if I use my obd2b automatic ecu I can rev just fine up to redline (I get automatic check light).

 

that forth plug is just for automatic tranny ****, you dont use it w/ a manual tranny.


Is your obd1 ecu chipped?

 

ya its chipped but I also tried it with a stock obd1 ecu and the same thing happen. Wierd part is if I gradually acc I can rev pass 6K but if I full throttle it I cant.