Update on problems with swedish Q4 - Alfa Romeo Forum
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Status: - Update
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Update on problems with swedish Q4

Finally!!!!, we( A.Möller & me) have located the problem.
It seems as the Pierburg(sp?)-valve is broken.
I've disconnected it(electrical) and I still have 0.6 Bar in turbopressure. As I've just found out from the boys in the EVO-forum, the groundpressure is 0.6 bar.
Since I've tested 2 different chips,
(Thanx Maxiboost), and never got a higher pressure than 0.6, my car must have been on groundpressure for as long as I've had it.....

How much is a new valve??? anybody know??
Can I repair the old one or modify it???

Tom C, Sweden
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I've found the problem and the car is now working just fine.
After taking off the valve and checking it with a voltage meter, we found nothing wrong with it....BUT we found out that previous owner had switched the + and - in to the valve.
So after just switching back the contacts, the car loaded OK again and was running very good. Gonna take it for a spin this evening and see what boost it deliveres.


Tom C, Sweden
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Join Date: Feb 2001
Location: Wombourne, UK
Posts: 1,134

Member car:

156 2.0 Veloce

We could do with a bit more of this - too often, someone will post their problem, but not finish off with the solution. It would be nice to hear how each story ends.
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