hey evryone i have a chipped p72 OBD1 ecu and it looks like some lil transistor is blown to **** and i just wanna see how important it is. or if it will make the car not run. does anyone have a circuit diagram for the ECU board of a p72?

 

no diagrams that I know of (and I've been looking for a few years)
which transistor popped? I have a P72 sitting here, I should be able to at least get the part replaced.

pics are always helpful.

 

its Q31 transistor. i did a search on another forum and found out this is common to blow if someone accidently switchs the IAT plug with the purge plug or somethin.

but this transistor i guess is just a purge signal output. but i dont have EVAP anymore so WHO CARES LOL

 

yep, EVAP purge control solinoid.
make sure you didn't connect the EVAP purge plug to the IAT, other than that, it's not a big deal, the ECU will not set a CEL for it and if you don't have the EVAP setup anyway...