Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: VXL V6 on 14 September 2007, 23:41:30

Title: Air Temp Sensor
Post by: VXL V6 on 14 September 2007, 23:41:30

On a late-ish 3.2 facelift  where is the incoming air temp sensor? It's not in the pipe from the airbox to the bagpipes as per the earlier cars and I can't see it anywhere on the intake before the airbox.

Title: Re: Air Temp Sensor
Post by: Markjay on 14 September 2007, 23:55:33

errr... donnow. Good question, it was supposed to be there:

(http://img101.imageshack.us/img101/1212/tempch5.jpg)

And this is what it looks like on the 3.0L:

(http://img524.imageshack.us/img524/1705/airvm3.jpg)

Maybe it has been incorporated into the MAF sensor...?

Title: Re: Air Temp Sensor
Post by: VXL V6 on 15 September 2007, 00:02:00

Hmmm, that's what I thought as well.....

Thanks  :y

Title: Re: Air Temp Sensor
Post by: TheBoy on 15 September 2007, 09:58:00

Had a (very) quick look around wiring diagrams, cant see it on there....

Title: Re: Air Temp Sensor
Post by: VXL V6 on 15 September 2007, 10:04:17

Thanks TB.

I'm confused though, there must surely be one otherwise how would the ECU know the incoming air temp?
Also, you can display the incoming air temp on a Sykes Pickavant diag tool (so presumably a TECH 2 as well).

Title: Re: Air Temp Sensor
Post by: TheBoy on 15 September 2007, 10:13:38

Quote

Thanks TB.

I'm confused though, there must surely be one otherwise how would the ECU know the incoming air temp?
Also, you can display the incoming air temp on a Sykes Pickavant diag tool (so presumably a TECH 2 as well).

I haven't a 3.2 I can test the tech2 out on....

Title: Re: Air Temp Sensor
Post by: VXL V6 on 15 September 2007, 10:18:21

I'll have to call in one day!

The reason why i'm interested is that while extinguishing the emisions lamp for the second time and trying to diagnose the fault it was noticed that the incoming air temp seemed a bit high.

Title: Re: Air Temp Sensor
Post by: Markjay on 15 September 2007, 15:07:02

Just edited my previous post for the uninitiated...  ;)

Title: Re: Air Temp Sensor
Post by: Marks DTM Calib on 15 September 2007, 16:16:31

Its not realy required, air mass actualy takes into account temp any way (as the mass changes with temp any way).

The air temp sensor on the 2.5 and 3.0 plays very little part in the ecu calcs.

Note also, the air temp can get very high with the bonnet shut....

Title: Re: Air Temp Sensor
Post by: VXL V6 on 15 September 2007, 17:23:11

Right, thanks for the info Mark.

So that's possibly an issue that needs to be crossed off the list. my thoughts now are that maybe the cabling on the Lambda sensors is breaking down with the heat?

Need to get the car up and have a good look underneath I think, I can see the sensors before the cats but where are the ones after?