[alfa] 164 Rough idle

[Eric Storhok <alfa@xxxxxxxxx>]

Question about the rough idle- have you noticed that your fuel economy has 
dropped off a little?

On our 164LS, the flex coupling failed, which lead to a nice sized leak in 
the exhaust, and to dilute the O2 sensor into thinking that the engine is 
running lean, so it ran richer  and richer....  From a professional 
standpoint, that design is a disaster- putting a flex pipe before 1) the 
only exhaust sensor and 2) the entire catalyst system is a system waiting 
for failure.  Add to that, the horrible quality of the coupling....  Which 
is odd, since the rest of the system seems like very high quality (for 
production) stainless.

We managed to find a new, and modern, coupling.  Our local hot rod exhaust 
house fabricated it in for me.  Works perfectly.

Not that this IS your problem, but it could be part of it, as your symptoms 
were some of the same we had.

Eric Storhok

p.s.- one MORE change to my turbo post- Jim's customer's Alfetta has a 
Milano transaxle in it.  Needed a GTV6 drive shaft, and some serious work 
on the clutch to work.  There are other details, but suffice it to say, IF 
you boost an Alfetta, there are a number of things you'll need to do to 
keep the powertrain together.

AROC Detroit Homepage:  http://www-personal.umich.edu/~alfa/index.htm
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