New spark plugs, new tires, new wires, new air filter....car running great. Just bought it, and installed all the new stuff mentioned. It is an automatic 4 door EX......so, Why in hell I am only getting 19 to 20 MPG on HWY and 17 to 19 in City, particulary on a car running so beautifuly?

PS. 165K miles

Any help?

 

you need to replace old Oxygen sensors


that what mostly affect MPG ratio

also - depends on what kind of fuel you're using in your car

 

I would also think about changeing those O2 sensors also like Evlampius was saying about...
They are important to change out.

WheelBrokerAng

 

New spark plugs, new tires, new wires, new air filter....car running great. Just bought it, and installed all the new stuff mentioned. It is an automatic 4 door EX......so, Why in hell I am only getting 19 to 20 MPG on HWY and 17 to 19 in City, particulary on a car running so beautifuly?

Just did the oxigen sensor and a strong fuel injector cleaner... still 19 MPG... any ideas? How about the cat converter? Or maybe any particular sparkplugs?

 

did u chk the timing ???

 

Did you get to the bottom of this ?

 

Not yet. Any ideas?

 

May be a brake problem. Are your pads on correctly? (not rubbing significantly while not braking)

 

what year car, and what spark plugs did you install ??

 

1992 Honda Accord EX. I installed NGKs V-Power. By the way, brakes are ok. I read in the Internet that beginning with the 1990 model year, certain Hondas were equipped with an Electronic Load Detention (ELD) module which was designed to improve fuel economy by almost shutting off the alternator during light throttle and idle. If the module fails, the ECM loses a sensor and the vehicle may experience stalling, rough idle, or low / no alternator output specially at idle. I still can not get better than 19 MPG. Now with the alternator problem, I wonder if this module is the reason for all my problems (both fuel mileage and not charging in idle), or, does anyone knows something else that could help me?Have anyone heard this? What this thing looks like? Where is it? Does my 92 Accord has one? I am installing a new alternator today, by the way.