Hi all

I recently bought and fitted an after market lambda sensor and air:fuel ratio meter. Whilst it generally gives a usefull amount of information, when the car is under sustained pressure (ie round a track), the gauge becomes useless. The gauge quickly reads very very lean, then goes off the scale completely, and wont come back until the sensor has cooled down!

I spoke to the guy who sold me the stuff who stated that this was to be expected under heavy load.

Has anybody else had this problem at all? Help!

JJ

 

If it's a narrow band system then yes it will do that. Nothing more than twinkling lights on your dash board to be honest.

Also depends what temp the lambda is rated at and what temp your exhaust gasses are...

 

It is a narrow band. The wide band price was somewhat offputting. I agree though, if I'd known then what I know now, I may not have wasted my money.

Interesting what you say about the lambda sensor, I didn't realise they had different heat ratings.

JJ

 

Some sensors can handle a higher heat range than others.

 

yeh, if its not a titania type one and u have fittef a zirconia type, this may well happen

 

Hmm - intersting. Where can I get a zirconia type from?

 

no no, u need a titania, NOT zirconia, the titania ones are a higher heat range.

 

http://www.lambdasensor.com/main/mcolours1.htm

 

Aha!

My mistake, and thanks for the link. I am a little hacked off with the place that sold me the sensor - a cosworth specialist no less!!

Suppose you get what you pay for!

 

the proper ford ones which are incidently NTK ones as sold on that site, are about 180 quid

 

Have spoken to the supplier of the sensor I bought who has assured me that the sensor is titania, so back to the drawing board.

I wonder if a little more research into the heat ranges is in order.