Running rich

[Nic van der Walt]

>I have a Kawasaki GPz1100A1 (ZX1100) which has F.I. as standard but is
constantly running rich. Confirmed by the plugs
>being a definite sooty black. Unfortunately, I don't have means to test
O2 or CO exhaust content.

>The only sensors monitoring the engine are engine temp, air temp,
throttle position and engine speed. These all check out
>OK and appear to be within tolerances.

No MAP or MAF? If the ECU doesn't compensate for MAP or MAF it cannot
deal with any changes in the
intake or exhaust system.

General bike experience would have me check the following:

Is the exhaust standard? 
Even if it is the insides could be rusted or damaged, changing the flow
considerably.

Same for the intake stuff, airbox etc. Is the airfilter original? A
cheap aftermarket or
a dirty airfilter could be reducing airflow enough to throw of the
factory mapping.

I have a throttle rack stripped out of an early 90's EFI Kawa. The fuel
pressure regulator
references to MAP, not atmospheric. This allows the ECU to get away
without an explicit MAP
input. But the setup was still not happy with major changes to the
plumbing. Are you sure
the regulator is OK?

N. 
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org