hey Mauricio, i have got the same swap as you. check back your wiring with my diagram and make sure it is good. what temperature do you read at idle once warmed up and driven for a bit?

Btw, this diagram is based on a patch harness, hence the reason for the harness side being the female and the ecu side being the male

 

Hye thanx man!!! i don´t have temp gauge only the original of the Evo.. so I don´t have exactly numbers of temp!!! The only thing is that I have the Evo thermostat (82°C) Evo 4 thermostat is 76.5°C, so... I don´t know if that help to you?

 

what temp does evoscan give? it was reading 6 deg C more than the actual temp for me, so i had to change the formula, compared it with a actual gauge to calibrate.

changing the thermo fan duty did nothing? at 190 deg F (87.7 C) the main fan is supposed to come on, but at 187 deg F (86 C) it is supposed to be off. at least that is what i have for mine. i will do some more testing to confirm those values

 

fan wiring swaps pin 20 to 32 and pin 21 to 34 . if its only happening since stat change then there shouldnt be a prob there

 

Ok, Gracias!!!
Was checking and I did that swap before. Before changing the thermostat everything worked perfectly in the car, after that changed. So, I do not think that's the problem.
I'll try to disconnect the thermostat and see what happens. If not then I'll put a thermostat of 76.5 ° C which is the original Evo 4.

 

Problem solved!!!! It was thermostat!!! Chaged the evo 8 thermostat (82°C) to 76.5° (Evo4) and fans run and off great!!!

Thanx to all of you guys!!!!

 

glad you got through!

what kinda stuff you looking to do with the ecu now

 

Hi, well nothing, only reflash this week I start to tune my car with for my sign mods... I hope good numbers in a 1/4 mile...