1G The miserable J722T ignition transistor...

[Blindmouse]

Hi!

Ordered some brand new pieces of that Ignition Transistor unit from the fantastic & shitty China just for spare.
I got them, looks same like the OE pieces included the "Mitsubishi"text too.
Drop one by one them in my car, all started fine, after a half hour of driving, when got the heat starts misfiring. Almost like the bad OE ones, but not the same. Randomly half seconds misfiring, maybe just ONE cylinder, not 2 when the OE pieces dies. Then I stop the car, plugged the OE one, then works fine. WTF?

I've replaced the ignition coils too, but the behavior is stills.

Any tips, suggestions?

 

[steve]

Just wondering but what are you using as a heatsink for the Power Transistor?
Do they start working again once they cool down?

 

[Blindmouse]

Just using the stock plate of the transistor.

Yep, when cool down, put back in the car, they works fine, until the engine is fully heated.

 

[jamel16]

Those ones are crap, I ordered one just for a spare and it didn’t even work.

 

[Blindmouse]

Those ones are crap, I ordered one just for a spare and it didn’t even work.

Same behavior like mines?

BTW: Anybody knows any TRUSTED source?

 

[DSMPT]

BTW: Anybody knows any TRUSTED source?

I just saw early EVO guys in Japan were talking that the J722T PTU is no longer available from Mitsubishi Japan. So if you want OEM quality, your option would probably be to look for some OEM parts store that still has it in stock. Maybe you should ask Amaya, if you are lucky, they still have it in stock at some of their warehouse in Japan or in middle east. Or another option would be to get a good condition used unit.

 

[Blindmouse]

I just saw early EVO guys in Japan were talking that the J722T PTU is no longer available from Mitsubishi Japan. So if you want OEM quality, your option would probably be to look for some OEM parts store that still has it in stock. Maybe you should ask Amaya, if you are lucky, they still have it in stock at some of their warehouse in Japan or in middle east. Or another option would be to get a good condition used unit.

Holy crap.

Used units checking before buying is impossible, because in cold all of them work fine, until heated with the engine. All of sellers says "it's okay", except the local sellers, well.. they number is around me= almost zero

Who the heck is Amaya?

 

[DSMPT]

Holy crap.

Used units checking before buying is impossible, because in cold all of them work fine, until heated with the engine. All of sellers says "it's okay", except the local sellers, well.. they number is around me= almost zero

Who the heck is Amaya?

Anyways if you don't want a chinese or used unit, then I guess there is no choice. Try to look for a new genuine unit.

Amayama is a Japan based genuine parts online store.
https://www.amayama.com

 

[Blindmouse]

144-175$ for that lil crap? +S&H ooh thats funny

Anyways if you don't want a chinese or used unit, then I guess there is no choice. Try to look for a new genuine unit.

Amayama is a Japan based genuine parts online store.
https://www.amayama.com

 

[DSMPT]

144-175$ for that lil crap? +S&H ooh thats funny

Then just keep buying the real crap on eBay or Amazon. Would be your call.

 

[eclpstunr22]

Where is it located on a 92 GS? Thanks

 

[19Eclipse90]

Replacing Power Transistor on 1G

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It’s bolted to the driver side of the intake manifold.