MC2 running lean

[Dag Bøsterud]

I haven't done this, but the injectors were replaced two years ago.
Brand new Bosch units. Should have very good spray pattern.
...or..?

/Dag

1990 Audi 100 Turbo Quattro Sport Exklusiv

-----Opprinnelig melding-----
Fra: pat [mailto:psdooley at verizon.net] 
Sendt: 7. mars 2012 23:28
Til: 'Dag Bøsterud'; quattro at audifans.com
Emne: RE: MC2 running lean

Also with any type CIS I like to do a fuel pattern check.
Pop the injectors out and raise the air flow plate with pump running.
Check the spray patterns.

I realize this may not be the problem since all the cylinders run lean, but
it might give you some insight.


-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Dag Bøsterud
Sent: Tuesday, March 06, 2012 4:53 PM
To: quattro at audifans.com
Subject: MC2 running lean

I've for a long time been troubled with my 1990 Audi 100 TQ MC2-engine
running very lean. From June last year the car has been virtually
undriveable. You name it, I've replaced it, tested it and tried it. Hoses,
sensors, injectors, fuel pump, filters... brand new and double checked.

 

I read on the SJM-page that if you disconnect the temp sensor for the ECU,
the car will run rich and pulse the cold start valve due to the fact that
this is an NTC-sensor.

I disconnected the sensor in my car, and the car won't start. No way. Quite
the opposite of what it's supposed to do...

 

...how can this be???

 

/Dag

1990 Audi 100 Turbo Quattro Sport Exklusiv

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