ok.. someone help me please!!

i have a 1990 acura integra rs and im getting, what seems like to me, poor gas mileage. I filled my tank and drove it till she was dry and got exactly 260 miles. It is an automatic but never the less i use it mainly as a commuter. I usually drive speed limit and i only get on it sometimes. Ive been fixing this car up for about 2 months now. My check engine light keeps comming on putting out code 43.

Ive replaced: radiator, all radiator hoses, thermostate, o2 sensor, fuel pressure regulator, fuel filter, cap & rotor, spark plugs and wires, distributor and coil, and air filter. All brand new

Ive been told to check my egr valve? But im tired of buying new parts and no result. If anyone has any ideas please let me know!

 

how many miles on the engine? brakes sticking? car warming up to normal temp? exhaust leaks?

could be a lot of things...

 

Code 43 is fuel supply system, what is your fuel pressure?

I would also check the cat, remove it and install a test pipe and see what the gas mileage is.

Also, pull the plugs after a good run on the highway, [at speed limit] and see what color they are.

Any other symptoms, hard starting, lack of power/acceleration or hesitation/misfiring? 94

 

did u find out what it was i also have that code