Bad CO reading for 164 TS

["David Hanley" <david.hanley1@domain.elided>]

Tim, sorry for the lateness of this reply, I've just returned from
holiday.

 

First try a new oxygen sensor - Bosch part about 90 GBP from a Bosch
Fuel Injection dealer - against 130 GBP from an Alfa dealer as a Bosch
part in a Alfa bag - best to take off and look at number on body of
sensor.

 

You need a big spanner I recall - 21mm maybe. But you can remove it
without jacking the car up, screws into top of cat under gearlever.

 

Second, check all spark plug leads are intact - I had one break at the
coil end, but this sent my reading much higher.

 

Third and if your really struggling still. and I mean struggling

 

On the air flow meter there is a square black box on the top about 4
inches square, 1 inch thick, close to the air filter housing I recall.

 

Prise a screwdriver into one corner, and wait about 5 minutes for the
glue to come loose.

When the lid flies off, take the car to the test centre.

Hook up to the emission test equipment, and turn the screw/spring in one
direction then the other until the readings go down.

 

I suspect my reason for having to use the third step above was
application of K&N filter oil on the engine side of the K&N air filter,
which subsequently jammed up the air control flap in the AFM.

 

Hope this helps

 

David.

Ex-94 164 TS (sorely missed, drivers car)

98 166 Super - more power, but not quite so nice handling
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