RE: 4KQ OXS & rev limiter ?

["Buchholz, Steven" <Steven.Buchholz@kla-tencor.com>]

> > > I need to get like 300-500 more RPM before the rev-limiter stops the
> fun.
> > > Any easy ways to do this? Is this controlled by the fool-pump relay?
> > Could
> > > the relay be modified to increase the rev limit?
> > afaik it's the fuel pump relay counting the coil signal. 
> 
> That was me being wrong there folks.  I now know... on the CIS-E cars
> the rev limiting function is carried out by the fuel ecu, and what it
> does is send a -40 mA (?) signal to the pressure regulator to cut the
> fuel supply to the injectors.  Fuel pump supposedly stays on.  remember,
> 
... if this were truly the case why would there be so many instances of
people having problems with rev limiter-like cut out on 4kQs which was
resolved by installation of the appropriate fuel pump relay?  You may be
correct that the fuel supply gets cut off too ... making it all the more
difficult to increase the rev limiter shutoff point ... but I'm pretty sure
that the FP Relay is going to be part of the solution as well ...

Steve Buchholz
San Jose, CA (USA)