i have a 1994 Honda Civic Lx Sedan, I have an exhaust and air intake on it, those are the only mods... Problem is that when i start it sometimes the RPMs stay on 1500-2000 idk y also its sucking up alot of gas for example, i put $20 filling it up above half between FUll on monday and by wednesday its almost at E.. what can i do? whats wrong? plz help

 

how far are you driving every monday-wednesday? $20 should last around 150 miles depedning on where you live and how much each gallon is..

 

Replace the normal parts:
Fuel filter
Spark plug
Spark plug wires

Depending on how you drive and where you drive it....will affect your mpg.

 

Is it throwing any codes?

The idle revs will stay high for a while when it's cold, but should kick back down to <1000 when it warms up.