My 93 Legacy Sport EJ22 Turbo 5spd is running really rough lately. I am in school and don't have time to rebuild right now but I found a possible replacement on E-Bay and need some advise. I have found three sites that say I can put a JDM EJ20 Turbo in my car with no mods or anything... a direct swap. A local sub mech said no way. He said the ECU would more than likely not work with the newer engine. Any help would be greatly appreciated. Thanks

You can't really do the swap and expect no issues. It would probably work, however there are going to be issues, one the injectors are different size, and that will play havoc with how the car runs, but you could probably swap the intake manifold over and keep the injectors, etc.

 

Personally, I'd look into troubleshooting a little bit before you write off the motor.

My 93 Legacy Sport EJ22 Turbo 5spd is running really rough lately. I am in school and don't have time to rebuild right now but I found a possible replacement on E-Bay and need some advise. I have found three sites that say I can put a JDM EJ20 Turbo in my car with no mods or anything... a direct swap. A local sub mech said no way. He said the ECU would more than likely not work with the newer engine. Any help would be greatly appreciated. Thanks

Newer engine?? What EJ20 are you planning to put in there? If you got a single turbo EJ20G out of a 93 JDM Legacy there should be very little problems, those two are very close in just about everything.

Thanks for the input guys. 777 you have an awsome ride I hope to have mine in as nice condition soon. I think I will take your advice and try to figure out what is causing the rough running rather than do the transplant. I am having the same symtoms as I was about two years ago when I replaced the MAF and had new valve cover gaskets put in. Idles really rough and is really sporadic out on the road. Some days it runs great and others I have to rev it to keep it running at stop signs. No "Check Engine" or any codes to go from. 180K on it now and I have alot of the parts for rebuiding, just no time till summer. Full tune up seemed to help for about a week at most. Doesn't burn oil. It does leak antifreeze out of the stinkin plastic inlet attached to the intake manifold but I don't think that could be causing any mechanical problems. It does make quite a seen when I come to a rest and steam poors out of the front of the car. I don't have a pc or a fast enough connection to link with or I would set up a page and post pics. Maybe after I get out of school in a year. Thanks again for the help and any mor advise would be greatly appreciated.

Newer engine?? What EJ20 are you planning to put in there? If you got a single turbo EJ20G out of a 93 JDM Legacy there should be very little problems, those two are very close in just about everything.

 

I was told that it is and EJ20 Turbo out of a 2000 Impreza from Japan with 30K to 40K on it.

I was told that it is and EJ20 Turbo out of a 2000 Impreza from Japan with 30K to 40K on it.

Yea, there would be more problems with that engine then the one I mentioned.

Sporadic rough running sounds more like you have a sensor or ECU fault somewhere. No need to switch any hardware.