one more question any body have a resistance chart for the air inlet temp sensor, I want to check ti see if mine is bad.

 

cloggd exhaust? bad grouds? fuel pressure regulator? missfire? brakes dragging?

 

My 2002 dodge neon es gets bad mpg too, i was planning on putting new oxygen sensors in it because the ends were white when i put my header and exhaust in. The mpg did pick up when i put the intake and exhaust on though.

 

How much stuff do you carry in your car? Extra weight like tools, speakerbox with subs that have huge 30 lb mags, big amps, gallon of oil, gallon of antifreeze.... I was carrying all this in mine it was like 2 extra people with me.... took all that out an mpg was night an day better + acceleration. But keepin everything else in tune & not in a big rush to get there is the key to best mpg I've learned

 

yea. drive like grandma and you will save money!

 

Probably not. Engines don't operate at peak efficiency the way they drive. Now, wear and tear...you'll probably have less if you drive like them.

 

Chaned plugs wires, o2 sensors, brakes air inlet temp, map, air filter timing belt idler and w/p cause it was Time not 1 mpg gained and exhaust manifold gasket no cracks and good compression across the board.

 

How fast are you driving down the highway? Are you keeping a constant speed? What is your tire pressure set at? Is your car in alignment? There's more to good gas mileage than a properly maintained car. In my Mustang (my DD now since the Neon went bye-bye), I can average between 8 and 25-ish MPG depending on how and where I'm driving. Currently, I average roughly 19MPG up here in the mountains with my V8 as opposed to the ~22-23MPG I got in my 4-cyl Neon. We bought a new 2012 Ford Fusion with the 3.0L V6 and average 24-25MPG up here. Yes, a V6 gets better gas mileage up here than my Neon did (both of them that we own do, actually). If a small engine has to struggle, it's going to burn more fuel despite being a smaller car/engine.

 

Well 72 mph 27 miles each way to work and only 1200ft above sea level 32 psi plus, but what I'm trying to find for cheep is a functional cat somone took off and a 2001-3 fuel rail with a schrader valve and possible use injectors to clean, think I av one stuck, I've only been in this area 3 yrs and haven't found anyone who does bench cleaning yet.

 

Hmm, I wonder what every here runs for tire PSI? I ran mine at 40 PSI. The tire shop always set them at 35 and the outsides wore down first so the next set I bumped them up. What's the max cold PSI on your current tires?