[Gas mileage]

Some advice I can give you is make sure your tires are properly inflated. Remove any unnecessary weight from your trunk, and when driving at highway speeds keep your windows closed. Oh yeah, and have your passengers walk!

[Drive Cycle?]

Test mode plugs? Sorry new to subaru. I cleared the codes by disconnecting the battery. (never installed plugs?)

[Drive Cycle?]

Hello all. I performed a search on all the forums, but was not able to find the info I was looking for. I have a 93 Impreza that had codes for the IAC. After fixing the problem, and clearing the codes, the CEL will flash continuously (no specific codes). It has been doing this for 2 days. Does the ECU have to go through a drive cycle before the light goes out? Or did I miss something?:cornfuzz:

[Reset ECU/USMB]

TSB = Technical Service Bulletin

This is literature sent out by the manufacturer usually to their dealers about common problems and fixes:banana:

[93 Impreza wont idle when engine hot.]

I had the same problem with my 93 Impreza. Cleaned the IAC with cleaner. Wiped town throotle body. Havn't had a problem since. Cheap fix too! :headbang: