i searched and found that stock civic pumps are all 79lph while all dohc pumps are 135lph. does this mean all of us with hybrid civics that kept our stock fuel pumps are running lean? please tell me im wrong.

 

Good question dear.

Bump for you.

 

I always thought the fuel pressure regulator fixed that problem.

 

what if your running a stock fpr?

EDIT:sorry i think i understand what you mean now that i read it again.
is this true?




[Modified by hondaeg5, 11:03 PM 1/27/2003]

 

lol, thats funny and true.....lol

 

fuel PRESSURE regulator... that helps pressure but what about VOLUME ?? a fuel pressure regulator will nott increase volume

 

The FPR is in the return line back to the tank. It works by adjusting the back-pressure thru itself, so the pressure in the fuel rail is correct. Flow rate is whatever it gets from the pump. If the pump is wrong (too small) then possibly sometimes, the FPR will not be able to close itself off enough. This happens if your injectors use lots of fuel, leaving very little to return to the tank. Then the fuel rail pressure will drop; you'll see that if you use a fuel pressure gauge. I suppose then it would run lean & throw a MIL, too.

 

anyone else?

 

i want to know the answer too, although i got lucky and put a fuel pump from a 99-00 Si in my old civic, now I got a 255 pump, but i'd still like to know for future reference.