Re: In persuit if the infamous codes the rev counter jumps to 7200rpm, and other anomalies..

[ti@amb.org (Ti Kan)]

Kenn Thyrsted Nielsen writes:
> You describe the code pulling sequence for the older MAC's, and is referring
> to the "Bentley chart".
> Therefore i hope you can translate a code for me.
> In short: I need to know what it means when the tach reads 3000rpm with the
> engine check light ON.
> 
> The long story is that i'm experiencing an periodic problem:
> Recently the engine check light is coming on under light to medium
> acceleration.
> (also under full throttle, but i only checked this once)
> Slightly backing off the throttle makes the light dissapear, and i can feel
> the engine pulling more willingly (not much).
> 
> I pulled the codes; it said 3000rpm (MAC 06A).

For the MAC-07 computer that is on my 84 5KST, this indicates a fault
in the intake air temperature sensor.  I don't know if the MAC-06A 
is the same, but it's likely.  The intake air temp sensor is the
little black plastic gizmo with a black cable coming off of it,
mounted on the intake manifold near the throttle valve.  Before
you replace it, first check the solder connection on it to make sure
that isn't the problem.  Peel back the rubber boot on the sensor
to check.  It's soldered with high-temp silver solder.

-Ti
96 A4 2.8 quattro
84 5000S 2.1 turbo
80 4000 2.0
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
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