sensor on inlet plenum

[Rb182]

Whilst changing the plugs on my 182 today I noticed a sensor/plug on the passenger side of the inlet plenum. There is a wire with a plug near by it which looks like it obviously is meant to be plugged in there. I was puzzled as to why this was unplugged but on closer inspection noticed a resistor has been placed in the plug (on the wire side not on the plenum side).

Can anyone enlighten me as to what this is/for, I'm preuming some sort of air flow sensor but why might it have a resistor in and be unplugged???

Thanks

 

[mark123]

I think that is the air temp sensor. Why you'd want to frig it I don't know. Maybe it was knackered and they didn't want to splash out on a new one. Don't know if they're expensive.

 

[Rb182]

I was thinking maybe its thrown on a light and thats why they've done it.

Doesnt seem to affect the running of the car though :S

 

[sideways danny]

what you've found is the infamous ebay "chip"

It frigs the signl to the ecu, and just causes overfueling. remove the resistor and plug in the sensor and you should get better economy and gain some performance back

 

[Rb182]

Its coming out today then if it could possibly be that, will see if it is or just faulty I suppose.
Thanks

 

[Shaunyboy]

The things people will bodge up is unreal lol

 

[Rb182]

The things people will bodge up is unreal lol

I know lol nice to know the previous owner knew what he was doing with the car :dapprove:

Anyway, I've taken it out today and the car is running really lumpy on idle. I'm gonna price up a new sensor tomorrow.

 

[sideways danny]

they do run lumpy on idle. the bodge around will have made it rich, and that can smooth it out. Is it running better generally?

 

[Shaunyboy]

take it for a good run, and let it get upto temp as if its a a resistor thats been fooling the ecu, it will have to re-learn the settings for that sensor, may take a complete drive cycle for this to happen.

 

[Rb182]

I wouldnt say its running any better, not noticed any better fuel economy or anything, its just spluttering on idle. I've taken it for a good run this evening to the trafford centre and back and still no better, will see how it goes.
Thanks for all the help guys.