Re: ur-q air temp sensor

[harrison@indigo.ie (George Harrison)]

At 19:50 13/08/96 -0400, rdh@urq.East.Sun.COM wrote:

>Look at either O2 voltage or duty cycle on the frequency valve (does the
>MAC-01 even support the freq valve?). O2 voltage should be oscillating
>around 0.5V; lower is lean, higher is rich. Duty cycle should be oscillating
>around 50% as the ECU reads the O2 voltage and tries to keep it at 0.5V
>(higher duty cycle is ECU trying to enrichen the mixture; lower duty cycle
>is trying to lean out the mixture). That should tell you a lot about what
>the engine is doing, and what the ECU thinks the engine is doing . . .
>
>

Should have mentioned ....this is a Euro spec car (I'm in Ireland) so it
doesn't have cat or O2 sensor but it does have 200bhp (or at least it did!)

George Harrison,
Co. Kildare,
Ireland.

'85 ur-quattro
'86 80 Sport