Hey all. Newish vibe owner here... Been searching all over this awesome forum for tips and places to check in regards to my girlfriend's 04 vibe fwd. On average she's getting about 20-23mpg (mainly city driving) ever since she started driving the car in July. So I've searched tho forum for some ideas and well here's what I've done..
1) new ngk irridum plugs
2) upper and lower o2 sensors
3) cleaned intake manifold & idle valve (I think that's what its called lol)
4) cleaned maf
5) changed air filtre
6) changed oil & filtre
7) checked tire psi
8) disconnected the AC evap electronic plug (as for some reason the car would always engage the AC pump no matter what temperature when on both defrost modes) and put on a dummy plug to hopefully keep the AC working for the summer
9) new pcv valve
10) replaced was tank as it started leaking hah
11) no brake drag as checked that this past weekend when the fuel tank was changed
Anything else I can do to try and get better mpg? I know the car has high miles on it (325k) so that too could very well be the main issue. The car has plenty of power and starts & idles fine. So I'm left slightly puzzled...