I cleaned the MAF awhile back. It didnt make any difference. im getting around 23MPG.
it weird. when I start it when its cold it runs fine for about 30 seconds then startes to miss. It also has a hestitation till it warms up. after the engine is warm the hesitation is gone but it still vibrates at idle. Ive changed the plugs, wires, dist. cap & rotor, ECT sensor. I replaced a few vacuum hoses. Ive tested the ECT sensor, TPS, and MAF. last but not least I have cleaned the IAC valve. idk what to check next. I thought about doing a smoke test to see it maybe the intake gasket it leaking.