ok i have change the o2 sensor and i still get the cel...

fuel filter 8 months ago...

93 civic coupe 94 b18c

car runs fine with the cel on, but it still burns..

but it only comes on when the car has been sitting for a while...

if i drive it...cel comes on...i turn off the car...reset the ecu...car runs fine..cel no come on..

but if i let it sit for a few hours...it will come on???

anybody please help...

 

Fuel Supply System
defective or malfunctioning fuel supply system

Something is wrong with your fuel supply system. Have a knowledgable friend look at it, or take it to the shop.

 

could it be the fuel pump...the stocker is still in there after 190,000 miles...

but it runs fine....

 

check that your idle fuel pressure is within spec. i have had that problem before.

 

its the stock fuel press reg...how would i change pressure on a stock regulator?

 

usually pertains to one that has a riser. sorry.....but make sure the fuel pressure is within spec.

 

anyone have any first hand experience with this or had the same problem???

I am starting to pull my hair out....

 

I have the same damn problem. I don't know what it is either. Whenever I reset it, it stays off for a few days and comes back?

 

HELP!!!

so its just when my car is totally cold and it is starting to warm up is when the code comes on...

 

I get that plus #7 and another one for the o2 sensor. But no fix yet.

 

What Ecu are you running???

 

i had that exact same code but i changed my o2 and it stopped. my gas mileage got a lot better too since it was running rich while the light would go on.

 

usdm p72