recently installed my evo 7 ecu/afm/injectors into my evo 4 and swapped most of the pins needed but yet the check engine light is still on? when evo 4 ecu/injectors/afm were in the light wasn't on. what do i look for?

the pins I changed were: cable 20 moved into 32 pinslot and 21 into 34 pin-slot. also disconnected pin 40.

first start car from cold, then about 10-15 seconds check engine light comes on and stays on.

 

That's probably the EGR fault code, since 4's don't have EGR, you need to disable that in the rom.

 

First step is see what the code(s) are.

 

swap pins 6 and 53

disconnect pin 87

add wire and pin to 79 to allow you to flash the ecu

put 16d0 in periphery 1 turns off o2 heater cel ( evo4 has 2 wire sensor only )
put 8889 in periphery 2 ( disables egr and associated others you dont need )

 

Cool thanks swapped a few more pins and it improved the idle (was kinda missing a bit on idle) and am going to plug ecu in next week

is removing pin 87 really necessary?

 

yes ,its idle switch on 4/5/6 but acd input on 7/8 as idle switch was discontinued

 

Cool done that now as well, I've also disconnected pin 40, does this have to be grounded or can i just leave it unplugged?

 

i just leave it in place

 

I done everything now and put 16d0 in periphery 1 and put 8889 in periphery 2 and still getting CEL..

 

what s the fault code ???

 

How do i bring up fault codes? Also have noticed my idle on cold start idle creeps upto 1,900 revs, what could this be? -_-

 

Bridge pins 1 and 4 on the obd socket

 

cool cheers will try that to see if fault codes come up. do i just watch check engine light and count flashes?

 

Yes the long pulse is 10 and short is 1

Ie 2 long pulse and 3 short pulse is 23

 

Hey i tried to get fault codes to come up for CEL but none come up? Although abs light constant flash when 1-4 are bridged. Confused now lol