efi components/airflow meters/eprom programmers

[Rich Mauruschat]

EFI components and spares:
For EFI components; injectors, injector spares, connectors, lambda sensors
(non-heated =A336, heated =A366), temperature sensors etc. try Fuelparts UK:
<http://www.fuel-parts.co.uk>
Paul Tomlinson is the main contact.
The website is not very exciting but it is a point of contact and the
product range is interesting. They also do carb. components, filters etc.=
 also.

Airflow meter testing:
A few postings recently concerning afm problems; beware when testing flap
type afm's by measuring track resistance only, they usually operate on a
ratiometric basis reading the wiper voltage relative to the 'top of track'
voltage. As a result the absolute track resistance is not particularly
important and quite a variation from one unit to another is possible. The
track is actually a series of stepped resistors and on a RESISTANCE
measurement will not appear to have a smooth transition across the flap
travel. When connected up however, the wiper VOLTAGE will vary smoothly
(indeed as the flap is slowly opened the resistance between the end of track
and wiper can often be seen to alternately increase and decrease across the
flap travel) -  I have yet to get a convincing explanation for this - any
comments??

Eprom programmer
Yes DATAMAN S4 is a great tool, we have used them for a long time. If you
want to emulate and change data on the fly then investigate the ORBIT 32
from Stag Programmers (ideal for ECU development). Neither of these devices
are cheap (approx. =A3500 for S4)=20

Hope this is interesting
Richard.