For several weeks now my 2005 WRX has had higher than normal EGT's. It is Cobb stg 2.
When at idle it's around 800 to 900 degrees. When driving between 30 and fifty it's running between 1200 and 1400 degrees. At cruuise it runs about 1550 with AFR of 14.7. When I go into boost it jumps to 1550 to 1800 depending on how long I give it throttle. I checked AFR and timing with my Cobb Ap and every thing seems fine. I buy gas at the same station most the time. I took my EGT gauge in to work and put it on a calibrated thermocouple tester with a new thermocouple from Autometer and it worked fine up to 1200 degrees (limit of tester).
I reflashed the Cobb map and it still does it. I cleaned the MAF to no avail. I checked for leaks after Maf, found none. Anyone have ideas what could cause this? PLugs are new and gapped to 0.030. Car runs fine but I am concerned and would not want to damage my engine. Thanks in advance. Bahama