VagaBondGravy

alright so my car has been acting up lately and i think the TPS might be screwed and i'm gonna have to replace my throttle body. I did some data logging with my accessport when the car was running and i noticed the TPS Duty was jumping all over the place, whether i was idling, accelerating, or WOT. You can physically feel the car surging as if the throttle body is opening and closing. It also jumps around when the car is off and the key is turned to the ON position.

 

I also checked the TPS Voltage and the Throttle Position and they were exactly what they were supposed to be...

 

TPS Voltage - 0.7V at no throttle and increases to 3.9V at WOT

Throttle Position - 5% at no throttle and 100% at full throttle

 

Let me know what you think

 

..oh and car is a 2008 Spec-B

I would reset and clear ECU, then "Re-learn" the DBW(drive by wire) cant remember how to do it off my head but i bet google can tell you how

There is a reason the map lights do not light up with stock set up.

The trace carrying current from the pin to the FET measures 1mm wide. The calculator here shows that a 1mm trace can support well more than 2.5 amps (about 16 actually). So it looks like the FET's 30W rating is the limiting factor. The existing 12V8WAL bulbs are unknown wattage, though. Presumably 8W? With 2 on the original circuit, each would have to be 15W or less to not exceed the FET's power rating. But if they are indeed 8W, then the maps lights added would give a total of 32W, slightly exceeding the stock FET's rating.

(not my work, full work up click link)

http://www.subaruforester.org/vbulletin/f85/body-inegrated-unit-dome-dimming-circuit-data-repair-83167/