Civic EG

im gonna make it short, i blew my motor a d15b2 and i got one from a del sol being a d15b7. after i put it this motor been killing gas like crazy! 20 mpg! so idk what the problem, did a tune up, wire, plugs, oil change new rotor and cap, even have good tires lol and still. i been like this for month. nieghbor told me it could bee some sensor? but no check engine light thou, friend said it might be the ecu???? help

it sounds like ur runing rich

how many wires does ur o2 sensor have?
ur o2 sensor could be "lazy"
which means its workin enought to not
throw the cel, but still its bad

94_jdm_ferio wrote:it sounds like ur runing rich

how many wires does ur o2 sensor have?
ur o2 sensor could be "lazy"
which means its workin enought to not
throw the cel, but still its bad

idk?

but i change the o2 from my old one it put it on ans still same, even switch the injector put my old one there ans still

but imm check to see how many wire it has