Code 43 - fuel system

[Sconic]

hey guys.

i recently pulled codes on my 92 accord ex and just one came up, code 43. this means fuel system.

i have a feeling it's the O2 sensor (part of the fuel system if you think about it) considering my gas-milage has gone down to about 20 mpg and it is starting to get a hesitation sometimes when i step on the gas (these were the same symptoms i had when O2 sensors went bad in my 86 cougar and my 94 cutlass). but then, O2 sensors have a specific code and that doesn't come up. So now im confused as to what to do.

any help or insight would be greatly appreciated. thanks.

[AccordCodger]

O2 senors do go out, but they are not part of the fuel system.

[Sconic]

well, they have a big part in determining the air/fuel mixture, so i figured it might be called part of the fuel system.

milage is now 18 mpg :-/

[blacknight]

Try cleaning the fuel system first before anything.
The injectors could be clogged.
Most automotive places (Pep boys, R&S Strauss, Autozone) can do that for about $50-$60.

[Sconic]

thanks ill try that out first.

[Shrewz92]

Sconic...I've a '91 EX, F22A4, Auto Trans. I had same issues: code 43 (fuel system) but no real explanation. I did replacement of fuel cap (our cars have a pressurized system and it's essential to proper fuel delivery) @ $6.95 from AutoZone. Now the system 'whooshes' when I remove the gas cap. Also, @ 159,000 mi, I figured the O2 sensor would need replaced. I ordered mine from www.maximumautoparts.com for approx $108.80, + shipping, no sales tax. With both these items replaced, CE light went away and mileage went up by min 5 mpg. Go figure....