Honda Car Forum

My 90 Accord works good when it's cold but when it warms up most times it
develops a flat spot on acceleration, starts to misfire, the more pedal you
give it the more it moans like there is a shorage of fuel. Soon after that
the yellow engine light comes on and it starts working good again. I think
it goes into bypass mode because it's hard on gas after the light comes on.
The engine code comes up O2 sensor so I replaced it. Still no good.
Sometimes I get a code 1 sometmes code 43 fuel supply circuit. If tf there
was a fuel delivery problem it shouldn't get better after the engine light
comes on.Threfore I have ruled out pump, filter and regulator, I'm thinking
it must be on the electrical side but don't know what to try next. Any
idea's?.

I have exact the same problem in my 1991 Accord.

Does not matter is Sports switch is on or off.

Replaced O2 sensor as well.
Also replaced the distributor due to oil leak.
Had Transmission computer replaced due to flashing "S"
Fuel filter changed too.

But still the cold hesitation in 2 gear during acceleration.
Once the car is warm runs fine. If the check engine light comes on runs
great.
I also sometimes here popping ( like a mild back fire under the hood) during
the flat spot.

Letting of the gas the pressing the peddle to the floor brings it back to
life too.

"isurf" <isurf@roger.com> wrote in message
news:HSlMb.93160$AAe1.32843@news01.bloor.is.net.ca ble.rogers.com...
> My 90 Accord works good when it's cold but when it warms up most times it
> develops a flat spot on acceleration, starts to misfire, the more pedal
you
> give it the more it moans like there is a shorage of fuel. Soon after that
> the yellow engine light comes on and it starts working good again. I think
> it goes into bypass mode because it's hard on gas after the light comes
on.
> The engine code comes up O2 sensor so I replaced it. Still no good.
> Sometimes I get a code 1 sometmes code 43 fuel supply circuit. If tf there
> was a fuel delivery problem it shouldn't get better after the engine light
> comes on.Threfore I have ruled out pump, filter and regulator, I'm
thinking
> it must be on the electrical side but don't know what to try next. Any
> idea's?.
>
>

Yes thats it, if you floor it when it's sputtering it will clear but the
engine light comes on. After you shut the car off the light resets and its
good for a while again.
"bob" <bob@hotmail> wrote in message
news:4-WdnQ-Ieri28p7dRVn-jg@comcast.com...
> I have exact the same problem in my 1991 Accord.
>
> Does not matter is Sports switch is on or off.
>
> Replaced O2 sensor as well.
> Also replaced the distributor due to oil leak.
> Had Transmission computer replaced due to flashing "S"
> Fuel filter changed too.
>
> But still the cold hesitation in 2 gear during acceleration.
> Once the car is warm runs fine. If the check engine light comes on runs
> great.
> I also sometimes here popping ( like a mild back fire under the hood)
during
> the flat spot.
>
> Letting of the gas the pressing the peddle to the floor brings it back to
> life too.
>
> "isurf" <isurf@roger.com> wrote in message
> news:HSlMb.93160$AAe1.32843@news01.bloor.is.net.ca ble.rogers.com...
> > My 90 Accord works good when it's cold but when it warms up most times
it
> > develops a flat spot on acceleration, starts to misfire, the more pedal
> you
> > give it the more it moans like there is a shorage of fuel. Soon after
that
> > the yellow engine light comes on and it starts working good again. I
think
> > it goes into bypass mode because it's hard on gas after the light comes
> on.
> > The engine code comes up O2 sensor so I replaced it. Still no good.
> > Sometimes I get a code 1 sometmes code 43 fuel supply circuit. If tf
there
> > was a fuel delivery problem it shouldn't get better after the engine
light
> > comes on.Threfore I have ruled out pump, filter and regulator, I'm
> thinking
> > it must be on the electrical side but don't know what to try next. Any
> > idea's?.
> >
> >
>
>

I got almost the same problem with my Honda Accord -92 2.0 i. When the
engine is cold it runs just fine, but when it's warm I can't let the foot
from the pedal because it stops directly. Sometimes it is also impossible
to start again. The engine light comes on after running warm for a good
wile. If I switch off the car and wait for a few minutes then it has reset.
For what I have heard this can be an issue concerning the electronics that
controls the injection. As I write, the car is at a garage where they are
searching for the error. I will let you know what comes up.

Have faith