2nd exhaust sensor?

[John Bennett]

I noticed the JDM S13 gave a reading for 'exhaust gas temperature ' when I had the consult on it today. This was as well as the 02 reading from the lambda.

Sure enough, there's a sensor for the mid-section of the exhaust. It obviously runs passably without it, as rather than make a thread for it in the aftermarket exhaust, someone had just tucked above the heatshield :wack:

Anyone else got one? Anyone know what it does of use in the ECU?

[Clouder_sx]

Maybe totally unrelated, but i've got a little piece of wire hanging down infront of my standard centre silencer (s14a) and always wondered what it is!?

[John Bennett]

Maybe totally unrelated, but i've got a little piece of wire hanging down infront of my standard centre silencer (s14a) and always wondered what it is!?

There's one on mine - I think it's a supplementary ground for an exhaust sensor. Whether it intended for the front lambda, or for this rear thingy (if fitted), I dunno,

[Matt_S]

On UK cars that strap is an earth wire to earth the exh to the car.

On JDM cars its a different wire and its a heat sensor wire to tell if the CAT is overheating - hence the dash light for it too :)

[Chris B]

I thought UK cars had the same sensor?

I seem to remember removing one from mine when I first changed the exhaust.

JDM R33 GTRs defo have the same thing.

[SM]

Pyro's 180 had it, it had been chopped roughly off and shoved behind the heat sheild, was one of the shorts/problems on his car.

[Easy007]

I got one of those too, just after the cat but before the join, but mines still plumbed in. I also have an earthing strap.