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Overboosting, louder spool, slower car...

3K views 5 replies 4 participants last post by  zax 
#1 ·
Today I noticed my 02 WRX was sputtering and backfiring from the exhaust when i gave it more than half throttle. The boost also spiked to 20 psi and the max ive usually seen is 15 according to the accessport. Driving around town I can tell the car is slower and the turbo spool is louder. Any ideas what this could be? I did a quick check of all hoses and vacuum lines but they all looked okay
 
#5 ·
Turns out my car was in limp mode. Now I'm getting a reoccurring P0507 for idle being higher than expected. I had the car vacuum and boost leak tested, the throttle cable isnt holding the throttle open either. The car does have TGV deletes aswell so when I start the car it idles around 1700 for a few seconds and comes down. This is usually when the engine light comes on. Normal operating temp idle is 650ish
 
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