Fuel Injection Light

Hi Guys,

Have a problem with my 1999 GSX-R 750. After riding approx 20 miles
the fuel injection warning light glows red and then the bike begins to
do periodic hiccups. The light and the hiccupping goes away once I
stop the bike, turn the ignition off and restart. This only happens
after riding it for 20 miles or thereabouts. The hiccupping seems to
go down in periodocity if I down shift to the 5th gear and ride it at
that. But at 6th, it is more often though the rpm is 7000 or more.

I cleaned the air filter and air box and checked the air passsages,
seemed clean. Took it to the dealer and after charging me $50 told me
that they couldn't replicate the problem.

Any help or suggestion will be appreciated. Thanks.

hemu...

 

Some FI systems are particulary sensitive to voltage. First, check your
battery connections. A poorly connected battery can cause all sorts of
bewildering problems. Also check ground connections. If they're
exposed to the elements, periodically clean them and apply Boeshield T9
(check aircraft supply places) to prevent corrosion.

If that doesn't take care of it, the proper way to diagnose the problem
is described in the bike's factory service manual. The warning light
should be supplemented with a more detailed description, perhaps
controller box LEDs or a dash display activated by pressing buttons in a
certain sequence.

 

I'm not to familiar with the workings of FI on bikes, but on cars the
FI light usually indicates an error, where a reading from a particular
sensor is out of range. If the error continues to occur, the ECM
usually switches to a 'limp home' mode, which usually results in rough
running but is enough to keep the engine going. I often have problems
with fuel, where a bad batch causes the oxygen sensor to give false
readings, putting the ECM into limp home mode and as a result the car
carries on until switched off and restarted...

Maybe go through the manual and look for a diagnostic mode?

Hope this helps

Ben

 

If it's the same as the Hayabusa you can find the dealer mode connector (On
the busa it is a 4-way connector with just 2 wires into it, on the left side
of the bike behind the battery), then you can do this:
Run the bike until you get your fault, then stop the engine, but leave the
ignition on, and bridge the two wires in the dealer mode connector.You will
then get a fault code on the display unit on the clocks.C00 means no errors
on the busa, but you'll have to read the error and tell it to the dealer for
him to know what's wrong.
Please remember these instructions are for the busa, and may be a little, or
a lot different to the 750.