Subaru Diag Wizard *BETA*
Feel free to try out the Diag wizard but be mindful we are currently testing it so use its recomendations at your own risk!
PDRE Subaru Diagnostic Wizard
Answer a few quick questions and get a basic direction on what may be going wrong, whether it’s likely safe to drive, and what your next move should be.
Step 1 of 6
What issue are you having?
Misfire under boost
Breaks up, stutters, or falls on its face when boost comes in.
Knock / DAM drop
Feedback knock, fine knock learn, or DAM suddenly dropped.
Oil consumption / smoke
Burning oil, smoke at idle, decel, or under boost.
Overheating / coolant issue
Running hot, pushing coolant, bubbling overflow, or temp spikes.
Low power / won’t build boost
Feels slow, boost is lower than normal, or falls off hard.
Engine noise / knock / tick
Rod knock, valvetrain noise, ticking, or new ugly mechanical sounds.
Tell us about the car
How modified is it?
Custom tuned
Larger injectors
Upgraded fuel pump
MAF scaling / speed density changes
Boost control solenoid / plumbing changes
Recently installed new performance parts
Recent work or events
Recently tuned or map changed
Fresh engine / recent engine work
Sat for a long time
Issue started after hard driving / track day
Possible bad fuel / wrong fuel
Saw overboost / boost spike
Contact info
Your PDRE Diagnostic Direction
NEEDS REVIEW
Likely causes
Recommended next steps
Safe to drive?
PDRE recommendation
This tool provides a basic directional opinion based on common Subaru patterns. It is not a substitute for in-person inspection, data review, leakdown/compression testing, or dyno diagnostics.