Hello!
I'm new to the board here and have found some good information, but still have a couple of questions that I'm hoping someone knows the answer too.
Lately MPGs have been down quite a bit, around town here I got 21 MPG last tank 29 on the highway. we've had the car since 95' and it has never really gotten less than 28 MPG, mid 30s on the highway.
The car has a fairly new O2 sensor, the coolant temp sensor seems fine (it starts fine in the cold (well below zero F), according to the subaru mechanic here when the temp sensor fails the car will have cold start issues.) I can certainly check the resistance of it too to make sure its ok.
I found a link to the factory service manual in this post which I downloaded.
I see that there are 3 ways to check codes, the best/most informative being the "read memory", how do I engage that? I recall something about connecting a couple of wires/plugs under the hood, is that right? Or is that just for the U-check that doesn't provide as much info?
The CEL, fwiw, only comes on when running at close to WOT for longer periods of time, like up hills on the interstate, I NEVER see it around town or on the highway at less than 70 MPH.
I have a hunch that the MAF is going south, and the manual I downloaded had a good step by step to check it which I will do when I check the coolant temp sensor.
Any advice would be appreciated
Thanks!