Hi guys, I think this a re-thread but im getting crazy with this problem.

Ok im trying to be short with the story.

I got a Evo 4 and i recently made an evo 8 ecu swap. ( wiring diagram from evoscan and some help from evolutionm)

It crank it really good ( with a stock evo 8 rom with tephramod v7 gotten from evolutionm tephramod v7 thread).

I toke it for a spin, and cant rev more than 4000 rpm ( like a misfire or hippous). I checked with evoscan the only ecu error was p0125 02 sensor or sort of. Also I datalogg with evoscan and the knocsum was scary ( 6's,8's even 10's) but no showing that error.

I decide to search more and put a stock rom ( no tephramod v7) and now it showing those codes (P0340 and P03350). I erase them with evoscan and instantly appears again. Again I cant rev more than 4k rpm

Please help with this, i've been reading a lot and tryin anything (next step would be is to buy a new sensors).

Thanks for the help!!!

 

are you using the 9653 ROM? Its the only one that seems to work with that setup.

 

No, im using 96530006 rom.

Where can I get that rom??

 

Plzz some help here!!! I can't find that room!!!

 

i am using 96532706 on my evo 4 with a evo 8 ecu. there are some periphery bits that need to be adjusted, the one for the front o2 heater circuit (from evo 5 go forward has the heater circuit sensors), the rear o2 and the EGR need to be disabled. have you done this?

and this may be a dumb/obvious question, but did you check how much the rev limiter is set at? can you rev past 4000 at standstill?

 

Right now Im using 96530006RSD.

I'm gonna try yours, cause i've been trying anything and this is last one to try.

It's ok to ask that, and yes Standstill I can Rev more than 4000 rom.

Pm to you buddy!!!

And thanks

 

have you rescaled injectors ? IV has 510 cc and in Tepra rom there are scaled for E8 560 cc's by default

@kronik5383
are your fuel trims MID and LOW cycling after disablign front O2 heater ?

 

When I did my Evo 8 ECU swap I had many code problems when I put the tephra mod V7, I had to disable some periphery bits because the Evo 8 have many sensors that the JDM not have. Now I'm running 96530706 tephra V7 very fine, no codes.

If you want help setting a good tephra V7 for your E8 ECU, just tell me what maf, injectors are you run. I can modify my rom and send you back.

 

it´s ok i got 560`s cc on it.

Thanks

 

Gracias Morera!!!!

Now, I datalogged and next CEL was Coolant Temperature for closed loop. And again, I can rev more than 4500 rpm.

Now, I saw the Excell sheet with the info of evoscan and I saw that cranksensor is not datalogged ( appears 0 ). With my older ECU ( Evo4) it appears as number 1. Is it that the problem???

Now Im running with 96532706 with tephra v7.

Thanks for the helps....Now moreeee help please jajaja

 

yo tuve ese mismo error de coolant temperature for closed loop, fue por haber hecho mal el swap de la compu de evo 8, por ahi en internet anda una guia de como poner una compu de evo 8 en un evo 4 y esta mal hecho el swap.

 

Yo baje los diagramas de evoscan y consulte en este mismo foro. Ahora acaba de salir a y sigo con un misfire despues de 4000 rpm use el fuel cut x2 (mas de 600). Pero sigo teniendo el mismo fallido. Por lo menos los codigos del crank & camshaft se fue.

Ahora me sale el codigo p0125 y no puedo rev mas de 4000 mil


English version

[quote = jonmorera; 9703940] I had the same error coolant temperature for closed loop, it was wrong for doing the evo 8 ecu swap , out there on the internet following a guide on how to make an evo 8 ecu swap into a evo 4 and was wrong that guide. [/ quote]

I download the diagrams from evoscan and some guide from here. Now went out and datalogged and appears a misfire and can rev more than 4000 rpm. fuel cut use x2 (over 600). But I still have the same failure. At least the crank & camshaft codes left.



Now I get the p0125 code and I can not rev more than 4k

Thanks

 

El misfire es facil arreglarlo, cierrele el gap de la candelas, tienen que estar bien cerraditas man, a 0.4mm tienen que estar.

Digame algo, sus avanicos prenden a 88º y se apagan a 82º?? use el dato coolant temp escaled en el evoscan para fijarse en eso, por ahi me doy cuenta si fue un mal swap de la ECU. me avisas, mandeme un sms al 8878-8118 para mas rapido. ahi para ayudarle en lo que sea, ya yo pase por todo eso

 

Estaba en lo correcto mae... Mal Swap de ECU, en la peineta hay 3 cables azules igual ( que son de los abanicos ) y tenia conectado mal el Volumen Air Flow.

Ahora estoy boosteando 1.17 bar y ajustando la mezcla ya que en alta esta dando 13's.

Gracias Morera!

 

Thanks for the help to entire evoM.

Was a wrong cable swap on the harness ( Volumen Air Flow wrong connected)

Now im running great with no CEL.

Thanks everyone