5000/200 Turbo Fuel Injection

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <VA.000005ab.00e0c139@maximum-bhp.u-net.com> Chris Wilson writes:
> In article <TCPSMTP.17.10.3.10.59.32.2374599595.443018@thevine.net>, in 
> mail.Audi_List, wrote:

>>> I am still unsure what signals the ignition module receives.Does it have a
>>> direct feed from turbo boost,to control on boost retard,or does it merely
>>> respond to throttle switches,and RPM?

> > there is a vaccuum/boost pressure hose that goes from the intake
> > manifold to the ECU (passenger footwell just ahead of the door on LHD's)

I think the 1B engine is very similar to the MB engine in the 1988 ur-quattro.
 
Someone turned up at the Area K meeting (Buckinghamshire) last Thursday with 
one that was mis-behaving - a 'fuel injection expert' had told him he needed a 
new metering head for GBP800-odd.  In fact, the WOT switch had gone home to 
Daddy - GBP15.  Took nearly an hour to find because of several other problems - 
wrong fuel pump relay, etc.
 
These are the MAC connections for the MB engine - plus the vacuum pipe, natch:

The ECU is connected to the wiring harness via a
latch- and-swing connector.  With the  ECU
removed from the vehicle, the wiring harness
connector should be viewed with the plastic
prongs on the right and  the locating lugs along
the side of the connector at the top. The upper
left pin is Pin 1, with numbering proceeding
along the connector to Pin 18 at the top right.
The bottom row is also numbered from left to
right, from Pin 19 to  Pin 35.

1.   Blue/Wh   Cold Start Valve (N17)
2.   Br/Ye     Chassis
3.             (USA - carbon canister)
4.             (USA - decelleration valve)
5.   Br/Ye     Chassis
6.             (USA - auto transmission)
7.   Mauve     Idle  Stabiliser (J142), Oil
               Pressure Warning Controller
8.   Blue/Bl   Frequency  valve  (N7), T35/3
9.   Br/Red    Chassis
10.  Blue      Coolant Temperature (G62 - side
               of block)
11.  Blue      Engine RPM Sensor (G28)
12.  Mauve     Ignition Timing Sensor (G4)
13.  Red       Ignition Timing Sensor (G4)
14.  Blue/Wh   Electronic Thermoswitch (F76)
15.  Br        Knock Sensor (G61)
16.  Wh        Knock Sensor (G61)
     Br        (shield for above)
17.            (USA - electronic boost gauge)
18.  Br/Ye     Chassis
19.  Gr/Ye     Wastegate Control Valve (N75)
20.  Grey      Idle Switch (F60), Idle
               Stabiliser (J142)
21.  Br/Red    Fuel Pump Relay (J17)
22.  Gr/Wh     Electronic   Ignition
               Power Stage (N70)
23.  Br        Inlet Air Temperature Sensor (G42)
     Br/Red    Hall Sensor (G40)
24.  Blue      Hall Sensor (G40)
25.  Red/Bl    Hall Sensor (G40)
26.  Wh        Full Load Switch (F81)
27.  Gr        Hall Sensor (G40)
28.  Br        Shielding for 11, 12, 13, 29
29.  Grey      Engine RPM Sensor (G28)
30.            (USA - O2 sensor ground)
31.  Bl/Wh     Fuel pump relay fuseholder
32.
33.            (USA - O2 sensor signal)
34.  Br/Ye     Chassis (USA - California)
35.  Bl/Red    Power via Fuse (S34, 10A)
 

-- 
 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club