MC2 running lean

[Huw Powell]

Warm up regulators can go bad too... although if all your fuel pressures 
are within spec it should be ok.

To answer another question, IIRC this fuel system is a weird hybrid of 
CIS-E(3?) and CIS, due to using the WUR on an -E system.

On 3/7/2012 5:48 PM, Dag Bøsterud wrote:
> No, the MC2 uses a warm up regulator.
> All pressures in the fuel system are within spesifications.
>
> /Dag
>
> 1990 Audi 100 Turbo Quattro Sport Exklusiv
>
> -----Opprinnelig melding-----
> Fra: pat [mailto:psdooley at verizon.net]
> Sendt: 7. mars 2012 23:24
> Til: 'Dag Bøsterud'; quattro at audifans.com
> Emne: RE: MC2 running lean
>
> The MC1 has a warm up regulator.
> I assume the MC2 uses a DPR?
> Was that checked?
>
> -----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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