RE: 4KQ OXS & rev limiter ?

["Dupree, Jim" <dupree@alldata.com>]

Rev limit control on CIS-E car is via the fuel pump relay. 
Rev limit control on CIS-E3 cars is via the fuel ECU.
A 4cyl fuel pump relay in a 5 cyl. car creates a low rev limit, 4k rpm or
so.
I wonder if there is a 6 cyl. fuel pump relay (off the shelf Bosch unit??)
that could be put in to a 5 cyl. car?
Jim Dupree

		-----Original Message-----
		From:	Buchholz, Steven
[mailto:Steven.Buchholz@kla-tencor.com]
		Sent:	Wednesday, May 12, 1999 4:25 PM
		To:	Audi Fans
		Subject:	RE: 4KQ OXS & rev limiter ?

		> > > 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)