I hadn't watched my AFRs in a while as I have been monitoring ECT like a totally paranoid hawk.

I ran some logs over the last few weeks and noticed my AFR shows rich under boost (as low as 11:1) but never climbs above 14.2.

I recalibrated yesterday and fixed a broken wire (not sure if that only happened when I inspected it but it's fixed now anyway) but it is still not giving a good reading.

It is an AEM 30-2301 single channel controller and sensor, plugged into an AEM EMS 30-1012 and AEM Serial Gauge.

Does anyone know if not being able to register a lean reading is a sign the sensor is gone, the controllers gone, or the whole thing needs replacing?

 

This might help:
[media]http://www.youtube.com/watch?v=1mb4VmDd0ao [/media]

 

Cheers, but I seem to have the opposite problem.

I'll disconnect and do his tests and see how it pans out. Cheers.

 

Also notice when you unplug the sensor the gauge should go to 14.7-14.8 a/f. And no problem, hope it helps!

 

Yeah, I'll look out for that too.

 

I had a similar thing to me, after going through a lot of trial&error and fault finding it ended up that the sensor had more or less failed (it got progressively worse).

 

Today I disconnected my sensor and the reading in the AEM Pro software stuck on 14.2. I adjusted the gain until it was pretty much on 14.7 (gain of 1.00).

Then reconnected it and ran the car. It showed 19 or so off and a fairly lean reading up in the 15-16 range but varied quite a bit when running.

I'm pretty sure the car isn't running lean. Is this the sort of behaviour one would expect of a dud sensor?

 

Problem solved.

Solution was to order a new sensor, go away on a 16 day cruise around New Zealand, then install new sensor on return.

The cruise is not entirely essential but highly recommended.

BTW, I plugged in the new sensor and did the tests with the brake cleaner. Reacted as expected.

 

lol have fun and good luck fixing it!

 

hooray I love when things get fixed!