Honda Car Forum

Hi,

I was checking my fuel system and fould that when I bled the fuel
lines, there was practically no pressure to be relieved.. Also, the
return line to the fuel pump had no fuel coming in to it. Is that the
way it usually is? The filter seems to be clean.

I did this after I had driven the car and let it stand for an hour or
so.
The car is a 99 accord 4 cylinder. F23A1

I have been having acceleration hesitation, power loss and mileage
loss and hence the checking.

Thanks,

es

Check the fuel pressure regulator. If it's open all the time, there won't
be much pressure in the fuel system. The FPR is between the fuel rail and
fuel return hose. The return hose would not have fuel if all the fuel
drain off after the fuel pump stops.

eswaroop wrote:

> Hi,
>
> I was checking my fuel system and fould that when I bled the fuel
> lines, there was practically no pressure to be relieved.. Also, the
> return line to the fuel pump had no fuel coming in to it. Is that the
> way it usually is? The filter seems to be clean.
>
> I did this after I had driven the car and let it stand for an hour or
> so.
> The car is a 99 accord 4 cylinder. F23A1
>
> I have been having acceleration hesitation, power loss and mileage
> loss and hence the checking.
>
> Thanks,
>
> es

Where would the fuel drain off to after the pump stops?

How do I check the FPR?



Sean Dinh <"seanny"@dinh@znet.com> wrote in message news:<1082220742.862983@news-1.nethere.net>...
> Check the fuel pressure regulator. If it's open all the time, there won't
> be much pressure in the fuel system. The FPR is between the fuel rail and
> fuel return hose. The return hose would not have fuel if all the fuel
> drain off after the fuel pump stops.
>
> eswaroop wrote:
>
> > Hi,
> >
> > I was checking my fuel system and fould that when I bled the fuel
> > lines, there was practically no pressure to be relieved.. Also, the
> > return line to the fuel pump had no fuel coming in to it. Is that the
> > way it usually is? The filter seems to be clean.
> >
> > I did this after I had driven the car and let it stand for an hour or
> > so.
> > The car is a 99 accord 4 cylinder. F23A1
> >
> > I have been having acceleration hesitation, power loss and mileage
> > loss and hence the checking.
> >
> > Thanks,
> >
> > es

eswaroop wrote:
> Hi,
>
> I was checking my fuel system and fould that when I bled the fuel
> lines, there was practically no pressure to be relieved.. Also, the
> return line to the fuel pump had no fuel coming in to it. Is that the
> way it usually is? The filter seems to be clean.
>
> I did this after I had driven the car and let it stand for an hour or
> so.
> The car is a 99 accord 4 cylinder. F23A1
>
> I have been having acceleration hesitation, power loss and mileage
> loss and hence the checking.
>
> Thanks,
>
> es
=============================

If the inlet of your catalytic converter is plugged up, why bother to
diddle atround with the fuel system? You said the engine ran, but that
little pressure came out the tailpipe, especially once you revved it. No
amount of Techron, or monkeying with the injectors is going to get the
crud out of your cat. . . . .

'Curly'

Let me clarify a bit. A pressurized air system would discharge most of the air if you bled the system,
since air is compressible, like all gas. A pressurized fuel system with metal line and a short run of
reinforced rubber line would spray little gasoline if you bled the system, since gasoline is
incompressible, like all liquid. A little bit of gasoline would discharge from a minute volume change
in the rubber line.

From my experience bleeding fuel system on Civic, there was little gasoline spill when I bled a
recently pressurized system. There was a drop or 2 on a system that was not pressurized for a long
time.

As for where that gasoline would go after the pump stop, my guess would be that it would leak back
through the pump. The only proper way to check the FPR is to hook up a Fuel Pressure Gage into the
fuel system. The FPG I got from Honda was like $35. The universal one was cheaper, but I did not want
to mess with adapters to fit with Honda's metric system.

eswaroop wrote:

> Where would the fuel drain off to after the pump stops?
>
> How do I check the FPR?

Hi,

I had checked out the CAT, its clean. Not a speck of dust or soot. And
the flow seems to increase as I further step on the gas, to around
4000 rpm.

So I am back to exploring possibilities. My car seems to run better or
almost normally when the tank is close to empty, and shitty when full,
and that seems to point towards a fuel system problem. Also, my MPG is
normal, not bad, on highway I am getting 30. So the problem is mainly
with the power..

How/where can I get a Fuel pressure gauge for honda ?

Thanks

es

"'Curly Q. Links'" <motsco__@interbaun.com> wrote in message news:<4083250F.9010604@interbaun.com>...
> eswaroop wrote:
> > Hi,
> >
> > I was checking my fuel system and fould that when I bled the fuel
> > lines, there was practically no pressure to be relieved.. Also, the
> > return line to the fuel pump had no fuel coming in to it. Is that the
> > way it usually is? The filter seems to be clean.
> >
> > I did this after I had driven the car and let it stand for an hour or
> > so.
> > The car is a 99 accord 4 cylinder. F23A1
> >
> > I have been having acceleration hesitation, power loss and mileage
> > loss and hence the checking.
> >
> > Thanks,
> >
> > es
> =============================
>
> If the inlet of your catalytic converter is plugged up, why bother to
> diddle atround with the fuel system? You said the engine ran, but that
> little pressure came out the tailpipe, especially once you revved it. No
> amount of Techron, or monkeying with the injectors is going to get the
> crud out of your cat. . . . .
>
> 'Curly'

ramswaroop@hotmail.com (eswaroop) wrote in message news:<d634bb54.0404201939.2909c596@posting.google. com>...
> Hi,
>
> I had checked out the CAT, its clean. Not a speck of dust or soot. And
> the flow seems to increase as I further step on the gas, to around
> 4000 rpm.
>
> So I am back to exploring possibilities. My car seems to run better or
> almost normally when the tank is close to empty, and shitty when full,
> and that seems to point towards a fuel system problem. Also, my MPG is
> normal, not bad, on highway I am getting 30. So the problem is mainly
> with the power..
>
> How/where can I get a Fuel pressure gauge for honda ?

I got a Holley universal item from the local performance store that
mounts permanently on top of the fuel filter, replaces the brass angle
fitting. Cost about $30 as I recall. The thing stays rock solid on 40
lbs, and stays on 40 lbs for a long time after the engine is shut off.
Like hours.
From what you say, I would certainly pull out the fuel pump and look
at the input tube and screen and stuff, maybe look into the tank and
look for floating crud or water or who knows. I have no idea what it
might be, but if it's dependent on the fuel level, where else would
you look?