Lousy MPG W/ 1600cc 93 mx-3, help and what's your mpg

[agomonaco]

I just bought a 93 MX-3 with a 1600cc engine W/auto Trans(55000 miles and it's a cherry). But it only gets 22 miles to the gallon. My Mazda Miata gets 33 mpg. Doesn't seem at all right. I have replaced all the obvious things, plugs, rotor, rotor cap.wires, fuel and air filter, checked timing, exhaust was replaced from catalytic converter back with standard diameter pipe and custom muffler.<p>any ideas out there? and what kind of mpg does everyone else get with this model?<p>Tony<p>[ September 11, 2003: Message edited by: agomonaco ]<p>[ September 11, 2003: Message edited by: agomonaco ]<p>[ September 11, 2003: Message edited by: agomonaco ]<p>[ September 11, 2003: Message edited by: agomonaco ]</p>

[lakersfan1]

Mazda automatics traditionally suck for MPG. They give new meaning to the term - slushbox. But you didn't mention changing the first thing I would look at for better MPG - the oxygen sensor.

[agomonaco]

O2 sensor...Yaa. good point. I did replace that too, unfortunately didn't change anything either..emissions are good, 50 HC at idle, 24hc @2500rpm: CO at idle and 2500rpm below 4.<p>Tony

[guyaverage]

Mazda automatics definitely suck on many levels, but you should be getting better mileage than this. I typically get between 28-34 mpg, depending how much city driving I do on that tankfull. Provided the basics are covered (air filter, clean oil, ign. timing within specs or slightly advanced, o2 sensor is good, etc) I would pinpoint driving style. If you are blasting up to 4-5000 rpm in first and second gear at every stop sign and red light, that will definitely take a toll on the gas mileage. Another thing to consider is a fuel leak or bad fuel cap, but you should be smelling it if these were letting that much gas out. Another possibility is an inaccurate speedo/odo. I just had my emission test, I will check it when I get back home and see whay my HC's were. I dont remember exactly what they were, but yours seem high (I could be wrong), I'll compare when I get home.

[agomonaco]

Thanks for the advice...but i think the next thing I'll check is the MAF and the temp sensor on the injection system.<p>put in a bosch O2 sensor...was told that was ok..hope i find the problem and get ur mileage.<p>Tony<p>[ September 13, 2003: Message edited by: agomonaco ]</p>