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Egt And O2 Sensor

MyR33GTS-T
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MyR33GTS-T Contributor

MyR33GTS-T

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Hey fellas. Had my car up on the hoist the other day and did my Engine, Gearbox and DIFF oils. Were all black and put good fresh stuff in em.

However while the car was up on the hoist i noticed a sensor coming out of the cat. Which had tape over it.

I believe this sensor is the EGT (exhaust gas temperature sensor). The tape was around the 2 coils of wires in it and i think its rooted..

The car is running heaps rich so i thought i should give replacing this sensor and the O2 sensor at the same time.

Where abouts would i get an EGT sensor from. The O2 isnt a problem.

Could this be the reason. Cos its faulty... and its dumping more fuel in to cool the exhaust down???

Cheers Blokes.

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chiksluvit Experienced

chiksluvit

Posted
Posted

I dont think EGT sensor affects anything, just throws up a light on the dash if it overheats. A lot of people take it off when they installl a metal cat

skylines always run rich when modified unless you have programmable ECU

Hey fellas. Had my car up on the hoist the other day and did my Engine, Gearbox and DIFF oils. Were all black and put good fresh stuff in em.

However while the car was up on the hoist i noticed a sensor coming out of the cat. Which had tape over it.

I believe this sensor is the EGT (exhaust gas temperature sensor). The tape was around the 2 coils of wires in it and i think its rooted..

The car is running heaps rich so i thought i should give replacing this sensor and the O2 sensor at the same time.

Where abouts would i get an EGT sensor from. The O2 isnt a problem.

Could this be the reason. Cos its faulty... and its dumping more fuel in to cool the exhaust down???

Cheers Blokes.

MyR33GTS-T Contributor

MyR33GTS-T

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  • Author
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I have searched but nothhing i seem to do will stop my car from running ritch as shit.

I thought this forum stuff was about helping inexperienced people become experienced. Not just to palm them off onto something else.

And how can u guarentee that the EGT is just for a light on the dash. If its hot.. wouldnt the computer naturally tell the car to put more fuel in to cool it down???

Michael

XxNinjaxX Collaborator

XxNinjaxX

Posted
Posted

EGT is pretty much only for the warning light in the dash, its to tell you that you engine has run ultra lean to the near point of stalling (my mates R32 did it) it sets off a trouble code and the ecu puts the car into a limp mode state. if your car is boosted above stock (say 10psi) like mine im not 100% sure on this so dont quote it but i think the ecu tries to make up for the extra air being forced in by dumping a whole lot of fuel in which results in the rich running. either that or you have a faulty o2 sensor.

hopefully that helps a bit if at all :)

Beer Baron Grand Master

Beer Baron

Posted
Posted

the cat temp sensor DOES NOT send the ECU into limp mode or any other mode. all it does is trigger the dash warning light which is there to tell you to slow down to prevent cat damage and also not to park in long grass as it's a fire hazard. it's in the original owners manual.

the 02 sensor will cure any problems with poor running at cruising situations (small throttle opening, low load conditions) but wont do anything for how the car runs at WOT etc.

are you running an aftermarket exhaust? FMIC? more boost? if so this is why the car runs rich. as the afm sees more air getting into the engine they start to overfuel as a form of engine protection. they just keep throwing more and more fuel in the more boost and power you run. the only way to cure this si return the car to stock (and they are a bit rich stock anyway), or get an aftermarket ecu and have it properly tuned. I know which one I'd do....

MyR33GTS-T Contributor

MyR33GTS-T

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  • Author
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Yeah i shall replace the O2 Sensor and see how i go....

And as for the computer.. Which is the best that is recomended.. As it is almost tax time and i should be getting a good summ.. (touch wood)

So i might have some money to spend.

The car is running about 10psi with a stealth boost T, has a FMIC whis doesnt do anything, reason being.... and the stock thermo fan was replaced with a thermo bolted straight onto the radiator.... no shroud or nething. WHAT A WANG he was when he did it. newho.. All is to be resirected with a new ALOY radiator and dual thermofan setup. Has a Varex exhaust which doesnt work because it is filled with carbon... AND that is alll...

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