Shouldn't a 2.0 liter engine be getting better gas Mileage than a 2.4 liter engine?

the four-cylinder 2.0 liter this engine has 4 injectors
the 6 cylinder 3.0 liter this engine has 6 injectors

Some "check engine" light in your dashboard? If YES, need to scanned the PCM (computer) to know exactly what fault code is stored there. If NO, the crankshaft position sensor may fail, causing engine stalling or a failure to start. Replacement or the failed sensor will commonly correct this problem.

Also, keep in mind that on the 2.7L V6 and 2.4L 4 cylinder, a defective Exhaust Gas Recirculation (EGR) switching valve may cause an intermittent rough or unstable idle engine.

Stalling synthoms... you can have a plugged exhaust, plugged fuel filter, bad airflow meter, problem with the ignition system, incorrect timing belt/chain setting, and failing fuel pump....I'm sure there's more but that should get you thinking.

Keep us updated.

Hi

As far as the review says the mileage should not falter since it is new as you said. However

These are the causes of a poor mileage in a car:-

Poorly Inflated Car Tires

Car tires that are improperly inflated create significant road resistance and drag on a moving car. A car engine has to work harder to propel a car forward due to this increased tire/road resistance. This resistance chips away at a car's gas mileage.

Dirty Air Filter

A dirty air filter impedes air flow into a car's engine, a process that disrupts normal engine combustion and makes it less efficient. This causes a reduction in both engine performance and gas mileage.

Bad Spark Plugs

Spark plugs are responsible for igniting a car's air/fuel mixture, an event that causes a mini explosion inside a car's engine cylinders. Bad or dysfunctional spark plugs don't fire, or ignite, properly; thus, they affect engine combustion negatively, which in turn negatively affects gas mileage.

Bad Oxygen Sensors

For a car to be at its most fuel efficient, its oxygen sensors, small and electronically operated, automatically adjust a car's air/fuel mixture and have to be functioning properly. Bad oxygen sensors cause abnormal air/fuel mixture ratios, a condition that results in poor gas mileage and poor vehicle performance.

Leaky Fuel Injectors

A car's fuel injection system is responsible for injecting precise amounts of fuel into a car's engine cylinders, where it is combined with air and ignited. For a car to perform properly, a specific amount of fuel has to be injected by each fuel injector into each engine cylinder. A leaky fuel injector wastes fuel by leaking it outside the engine and reducing the amount of fuel that makes it into the engine. This results in wasted fuel and reduced gas mileage.
It is suggested to start with a code scanner to find out if there are any stored fault codes in your car.

Also check this link for some helpful tips:-

http://www.wikihow.com/Increase-Fuel-Mileage-on-a-Car

Please get back to us if you have further query else please accept the suggestion.
Thank you for contacting fixya.com

It has a timing chain..Can't find any info on mileage to change?? belts are about 60.000 miles, i don't think you have to worry about changing by miles ??
You may call Toyota dealer and ask service manager?? Hope this helped you ?

I dont think its the motor but it sounds like maybe something inside the timing belt let go, when you do the timing belt did you replace the tensioner and pulley, if not then maybe one of the idler pulleys for the belt went bad, or it may just be a bad ignition coil or fuel pump. i would have the computer scanned first to see if there are any codes. the codes are very helpful as they will tell you if something has failed like a coil. 140,000 miles is not alot for a camry and i dont think its a bad engine. good day.

The 2003 Toyota Camry came with 2 different engines. If you have the 4 cylinder it's a 2.4 liter MFI DOHC. If you have the 6 cylinder it's a 3.0 liter SFI DOHC. I hope this helps you and good luck.

The letter is the engine configuration, the number is the number of cylinders.

V is a V shaped engine.
W is basically two Vs put together
I is inline
F or H is a flat/horizontal (used by Porsche and Subaru).

There are currently no V4 engines in cars. The Inline configuration greatly increases power over the V configuration, so for tiny engines Inlines are used.

V8= 8 cylinders... lot of power..lousy gas mileage
V6= 6 cylinders..not as much power as a V8 but better gas mileage..
V4= 4 cylinders...not as much power as a V8 or V6..but gets ALOT better mileage..

Hope this a little help for you...

sounds like o2 sencor

try either a cold air intake or a chevron....a chevron is a cylinder with slots cut like arrow heads which will remove air turbulence....that alone will increase your performance at least 25% and horse power about another 40 to 50.
go0od luck

The PCV and the fuel filter replacements are not going to increase you fuel mileage. What you should really consider is getting some good fuel injection cleaner into the tank, and get an "induction system cleaning". Those two items alone will address most of your mileage issues. The PCV does nothing for mileage, nor does the fuel filter. Also, for maximum fuel mileage, you should have the correct sparkplugs from Toyota in your car. "Aftermarket" plugs doe not perform very well at all.