dohc

just wondering if i can fix this

leed

Man, what is it with Q31. I had mine burn out as well on two diff. P28's. Im pretty sure it has to do with the O2 heater. I havent looked into what the exact part is, but I bet you could find out on PGMFI.org.

dohc

ya i dont know, im just wondering if i can get a new "transistor" or whatever the ---- it is and fix it up nice lol

Chris Harris

if you look here:
http://www.pgmfi.org/twiki/bin/view/Library/AddIABToP28

Q31 is referenced to D1780 here:
http://www.pgmfi.org/twiki/bin/view/Library/D1780

leed

Okay, looks like Im an idiot. Its Evap related.... https://www.homemadeturbo.com/forum/...?topic=38239.0

projekteg

yeah, i've seen a few, and from what i hear, they burn up like that from people switching the purge evap solenoid plug with the iat plug (similar plug style). there's been three 4 of these posts in the past month anyways, it's not needed and the ecu will function proplerly without replacing it, but like xenocron said, it is part number 2sd21780 from digikey

dohc

right on, ill just use it then hehe

tranceminister

Haha, there it is again! I posted the same topic with some "fried" pictures of a customers ecu a while back. I ended up chipping it and sending it back. All works well from what I've heard.

accordepicenter

if you dont need it, desolder it and remove it from the board, problem solved