Blue smoke at startup ++

Eyvind Spangen eyvind.spangen at
Tue Mar 26 08:56:38 EST 2002

On Tue, 26 Mar 2002 00:26:26 -0500, you wrote:

>Might be related to below, might not.  Oil level is half way between
>min+max, yes?

Yes, it is. About 60% above "min".

>Hmm, that doesn't sound encouraging, but I wonder why you only get it
>when the engine is cold.  Maybe have someone else start the car up
>while you listen(with hood up)?

I'll try that today, but with the noise lasting for only 3-4 seconds,
I have to be real quick :-)

>You can of course check the turbo.  Should be very little play in any
>direction(like, next to none) on the turbo shaft, and should spin
>somewhat freely.  Also check the hose coming off the turbo for oil.

Will do this today too.

>Is it smooth, or stumbling?  Does it pull strongly+quickly to 1.4/1.5
>bar?  How's the mileage?  Any codes?

Smooth, but not very quick. 1.5 is only seen beyond 4000 rpm going
uphill, 1.4 can be seen at about 3000 rpm. Mileage is not very good to
be a 200q20v, about 1 liter/10 km (I'm in Europe). Code 4444, so the
ECU knows nothing wrong. I ran the output tests, and everything
worked, at least it seemed so.

>Yes, it's a horrible design.  If you want, remove the trim pieces etc
>and pull the IC and replace that o-ring, but I'm guessing its not the
>problem.  A check for oil around that joint usually turns up quite a
>bit of oil/dirt, but not much of a leak.

Looks like mine. Some oil on the outside, that's why I'd like to check

>Might want to do a step-by-step trace of the entire intake system
>checking clamps and such.  I left a clamp very loose on the
>pipe->throttle hose, that wasn't fun...

Will do that sometime this week. Once on my old 200TQ (10v), the hose
that connects to the turbo outlet came loose.

>-leaky injectors(maybe try a bottle of techron full strength stuff?)

Can this really cause blue smoke? I'll dump in that stuff anyway,
probably needed after 160k miles..

>-busted fuel pressure regulator(long shot, but they have been known
>to go bad on the V8, for example, leaking fuel into the IM through
>the vacuum line; should be very easy to check, just pull off the
>control line and see if it leaks)

Can check this too. I replaced it on my mother's '90 V8, relatively
inexpensive and very easy..

>In the meantime, drive the car -very- gently.  Sarge lost his 200q20v
>in a very similar way(suddenly started belching smoke on startup),
>although it was chipped...

What happened then?

E. Spangen
'90 Audi 200TQ 20v

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