MC2 misfires (continued)

[Dag Bøsterud]

Yes. I have the special tool to measure all pressures (system pressure,
control pressure,
residual pressure), and they all check out OK.

As far as I know, duty cycle is another way of checking/controlling co%.
This has been checked out using the co%-pipe in the engine compartment.

/Dag

1990 Audi 100 Turbo Quattro Sport Exklusiv


----- Original Message ----- 
From: "David Michael" <adavidmichael at gmail.com>
To: <quattro at audifans.com>
Sent: Monday, May 17, 2010 2:47 AM
Subject: Re: MC2 misfires (continued)


> Dag,
>
> I have not followed the whole thread, but have you verified that the fuel
> pressure, and more importantly, control pressure are OK? Is he 02 sensor
> duty cycle OK when the air bypass valve control current is at the 
> specified
> value (430mv I think)?
>
> It is critical to have all of the basic settings correct on the the CIS
> system before you do any other diagnostics.
>
> I have found a few CIS diagnostic flow charts on the web - mostly focused 
> on
> Volvos. Some of the ones from Bosch are also available online. But either
> way, its really important for you to read about CIS and learn how it 
> works.
> Its not intuitive (at least it was not to me), bit once you understand it,
> it becomes much easier to diagnose,
>
> Good luck,
>
> Dave
> 90 200 QA with 240,000 miles
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>


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