Ok, so gremlins have returned in my 02 WRX. I thought I had the problem resolved but evidently it just went away because the ambient temperature went down again.
- 2002 Subaru WRX Wagon
- EJ20T Engine (~121,000 mi)
- Auto Transmission
- Invidia G200 Cat-back Exhaust
- Vishnu Catless Up-pipe
- Stock Downpipe with Cat
- Stock Midpipe with Cat
- NGK G-Power Plugs (replaced at ~96,253 mi)
- Napa Gold Fuel Filter (replaced at ~115,000 mi)
- MAF removed, cleaned and reinstalled
- Front O2 Sensor replaced (~95,000 mi)
- All fluids synthetic all around (Mobil 1) and changed regularly
- No CEL's (hidden or otherwise) per Scanner
- New fuel pump instaleld (~115,000 mi)
With the temperatures quickly climbing in the excess of the 90's here in Pennsylvania, suddenly an old gremlin has reared its ugly head. When the car gets up to operating temperature (about mid line in the temp gauge), it starts acting funny. What happens, to the best I can articulate it as, it seems like it goes into 'limp mode'. She just will not go over 3500 RPM's, it is like hitting a ceiling at that point. She sounds like she wants to try to go above that but it just cuts out and drops down below 3500 RPM's.
I am starting to think it is a clogged downpipe cat but wouldn't that occur no matter what the ambient air temperature would be? I mean it typically happens when the vehicle is in ambient air temperature greater than 90*F and happens very often if it is sitting in traffic for any length of time. It does get better (very little better) if after sitting in traffic it gets air of the open road for awhile.
This really leaves me completely confounded. Luckily with the price of gas, the vehicle has just been sitting primarily but it is the vehicle we prefer to take on trips (due to the storage space) and I really REALLY want to get this damn gremlin exorcised. Any ideas?