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Re: Hi, I'm new here! (longish)
In message <E1C0A3EDDB0FD111A3030080C864228B268E32@BEELZEBUB> Matt Edmunds writes:
> Better mention my car I guess: a 1989 ur quattro (Lago Blue) numberplate
> F 757 GKP. It's all basically standard (although I think the a/c might
> be aftermarket) except for a Scorpion exhaust which the previous owner
> had fitted. It's been maintained by Dialynx for the last couple of
Wheee!!!! Another missing MB comes in from the cold!
I have no record of this car on my databases. I'd appreciate the
VIN number and engine number _VERY_ much, as this car should be right
in the cambelt/flywheel change area.
I shudder at anyone taking an MB to Dialynx, because Aelred simply
doesn't know how they work. Arrange to take it to BR Motorsport in
Leamington Spa (I _know_ it's a long way) and ask for Martin to look at
> There's currently a problem related to the turbo which will be looked at
> within the next couple of weeks (i.e. when I have time to take it to a
> garage). If anyone would like to speculate on the cause, I'd be
> interested. I think (hope) it may just be a sticky/knackered wastegate
> - Turbo feels slow to start boosting (compared with other turbo cars
> (not quattros) I have driven)
> - If I floor the throttle in 2nd and accelerate strongly on full boost,
> there is much less power (lack of boost) when I change into 3rd
> - Under full boost in, say, 4th gear up an incline, the boost appears
> to come in waves
> - The engine occasionally suddenly cuts out at full boost
> (overboosting?). Obviously it's always when I'm overtaking something
> somewhere extremely dangerous.
OK - two points:
a) Your WOT switch is almost certainly knackered. On a 1989 MB seen
for the first time, I've stopped even testing the buggers. Part
number is 034 133 093F from Audi, or 0 280 120 308 from your
local Bosch fuel injection specialist. Cost is GBP38.50 + VAT
from Audi, a lot less from a Bosch dealer, and even less from
Tim on 01273 326189. Tell Tim I sent you.
That will almost certainly fix the sluggishness problem.
b) The cut-out problem can be diagnosed using the information you'll
find on http://www.teleport.com/~scottmo/ecuf.html - don't forget
that you must NOT turn the MB's engine off before pulling the codes.
So the sequence is: recreate the problem, park the car with the
engine running, and follow the instructions on the above web page.
> Oh for a boost gauge!
Doesn't tell you that much when you're diagnosing an MB, actually. What
you need is a diode attached to the wastegate frequency valve and a duty
cycle meter connected directly to pin 8 of the ECU. And a spare fuse.
Phone: 0385 302803 Fax: 01536 723021
(The contents of this post will _NOT_ appear in the UK Newsletter.)