my 08 scion tc is burning more gas than normal. use to get 220 miles a tank now im barely getting 160-170. I removed my cia thinking that might be the problem but nothing. I also used fuel injector cleaner, sea foam in vacuum lines, cleaned throttle body, replaced spark plugs, and disconnected then reconnected the battery to reset the ecu and nothing has worked im still burning gas. What could be the problem?

 

http://www.nairaland.com/802926/what...tart-consuming

 

^Some good info in that link. The tC is capable of a consistent 360mi per tank. No matter how I drive, I always seem to end up somewhere around there. I've gotten 400mi on the occasion I drive like a granny.

 

How many miles are on the car? Could be a number of things. Are the plugs gapped correctly? What did the old plugs look like, those are a great problem indicator.

A little check list off the top of my head:
-tires and pressures and/or alignment
-brakes
-faulty O2 or MAF
-clogged catalyst/exhaust restriction
-poor lubrication/oil
-air and/or fuel filters
-faulty fuel injectors
-vacuum leak
-ignition coils and/or spark plugs