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Discussion Starter · #1 ·
hey all, new to this forum had a question for whoever could tell me.

I recently bought a t5 ecu from the junk yard out of an 850. My car is a 98 v70xc, put the ecu in and worked mint, i was told not to use my ac so i didnt. been driving mint for about a day and a half until this morning i got a cel. pulled it up on my computer but unfortunately when i typed in my year make and model i used my car instead of the 850 so i couldnt see what the cel was for. i cleared the code, it was boosting fine all day then it would only boost to 3psi and the cel came back. luckily i had my stock ecu and threw it back in and it boosted fine again.

What happened to the t5 ecu to cause it to stop working?
 

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You're using an M4.3 ECU in an M4.4 car, it's anyones guess. Return it to the yard and wait for a 98 T5 ECU to pop up. You shouldn't be using it even if we were able to tell you what the problem was.

The code is probably a universal code, the car shouldn't matter. If you can find out what the code was just google it and you'll get a good idea of what it is.
 
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