Very bad fuel consumption

[Perry]

Hey guys,

Just asking b4 I'll take the car back to the tuner I'm pretty much killing 200km in a full tank sounds pretty bad aswell this is for only normal driving and no vtecing, its a ek b18c with internal engine work, I was suggested it could be my O2 sensor is gone, anything else ?

Perry

[tinkerbell]

it could be something that is preventing you from driving in "closed loop" operation,

where the ECU tries to maintain a 14.7:1 air fuel ratio (which is optimum for complete and clean combustion)

things preventing closed loop:

1. aftermarket ECU
2. broken MAP sensor
3. broken o2 sensor

other things affecting fuel economy:

1. fuel leak - check all lines and connections
2. aftermarket ECU - poorly tuned for off throttle fueling
3. broken injector - remains open, or over fuels
4. broken fuel pressure regulator - stays full open

[Perry]

thanks tinkerbell I've noticed a bad fuel smell inside the cabin could it be the fuel pump wasnt installed probably?

[tinkerbell]

yes - that is a BIG concern man!

because fuel evaporates so quickly - a tiny little leak will evaporate a whole tank of fuel really quickly...

get it checked out ASAP - and NO smoking in the car!!!!!!!

[Perry]

thanks for the help tinks problem solved it was the fuel pressure regulator was causing the fuel smell now i hope the fuel problem with be fixed