400BHP Posted June 11, 2003 Share Posted June 11, 2003 I shall be taking delivery of my NUR spec soon I hope, I have bought the second cat removal pipe but I have noticed a Lambda sensor on the exhaust pipe, will this stay on? if not what do I do with it because it not giving a reading to the ECU will surely balls up the fuelling from the management system. Also there seems to me a ginourmous heat sheild running most of the length of the middle section, any ideas? Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 11, 2003 Share Posted June 11, 2003 The second Lambda sensor (or temp sensor) on a UK spec car can be tied out of the way if there is no provisions for it on your de-cat pipe. A lot of UK spec cars run like this with no problems. Link to comment Share on other sites More sharing options...
Nathan Posted June 11, 2003 Share Posted June 11, 2003 I strongly advise against tying up the 2nd lambda sensor (it's not a cat overheat sensor). The fact that Toyota allocated a fault code specifically for it (27) that doesn't just cover a wiring faliure (it also has a voltage output that the ECU is always looking for) means that it just 'isn't right' to not put it back in the pipe. You may by chance not get a fault code by leaving it swinging in the breeze but it may well be still affecting the lambda maps. Your gamble. Nathan TDI PLC Link to comment Share on other sites More sharing options...
400BHP Posted June 11, 2003 Author Share Posted June 11, 2003 If this sensor was refitted after a De-cat then the readings would still be incorrectly supplied back to the ECU as the Heated Exhaust Gas Oxygen Sensor (HEGO) or lambda probe would be looking for a specific set of values which wouldn't be present without the presence of the CAT. Someone else must have fitted a NUR R spec with de-cat pipe.... Link to comment Share on other sites More sharing options...
Steve W Posted June 11, 2003 Share Posted June 11, 2003 .......lambda probe would be looking for a specific set of values which wouldn't be present without the presence of the CAT well, that does actually sound logical ! ! The 2nd lambda would be looking for a 'LOW' emmision to double- check the cat/injection system.... so I suppose it can't need it then ? ? so, if you DO put it in the pipe it'd be getting FAR too high a reading anyhow ? ? [i can't say for certain - mine's a J' wiv the cat'temp'probe - sorry] Link to comment Share on other sites More sharing options...
Geezabloke Posted June 11, 2003 Share Posted June 11, 2003 Ive got NUR spec with full decat and as far as i know the sensor is now out, have had no faults show? Link to comment Share on other sites More sharing options...
Nathan Posted June 12, 2003 Share Posted June 12, 2003 Originally posted by 400BHP If this sensor was refitted after a De-cat then the readings would still be incorrectly supplied back to the ECU as the Heated Exhaust Gas Oxygen Sensor (HEGO) or lambda probe would be looking for a specific set of values which wouldn't be present without the presence of the CAT. Nope. It's not interested in whether the 2nd cat is there, 1st cat or anything else other than comparing it's output to the first sensor. Read the UK spec workshop manual and you'll understand. Again, it's your call. Personally I wouldn't put a car out of here with a cable-tied lambda. Like I said, it's 'not right', and making it right is hardly a chore for someone that knows what they are doing. In addition, even if it was left out your quote above is still stating that the readings would indeed be incorrect. You have just admitted that the ECU would be getting incorrect A/R readings if left out... Nathan TDI PLC Link to comment Share on other sites More sharing options...
400BHP Posted June 12, 2003 Author Share Posted June 12, 2003 Originally posted by Nathan Nope. It's not interested in whether the 2nd cat is there, 1st cat or anything else other than comparing it's output to the first sensor. Read the UK spec workshop manual and you'll understand. Again, it's your call. Personally I wouldn't put a car out of here with a cable-tied lambda. Like I said, it's 'not right', and making it right is hardly a chore for someone that knows what they are doing. In addition, even if it was left out your quote above is still stating that the readings would indeed be incorrect. You have just admitted that the ECU would be getting incorrect A/R readings if left out... Nathan TDI PLC I never said that I was going to "leave it out" I was merely asking what I should do and if anyone else had fitted a blitz nur with decat pipe. I haven't looked closely at he existing pipe to see how the sensor fits, is it a tapping into the pipe? I do "know what i'm doing" i studied City and Guilds 3830 repair and servicing of road vehicles for 3 years at college, but I was just enquiring to see if anyone else had come across this problem before, forewarned is forearmed... As for the UK spec manual, that seems to be rarer than rocking horse shit, any idea where I could procure one? Chris Link to comment Share on other sites More sharing options...
Ray Posted January 8, 2004 Share Posted January 8, 2004 errrm oki ... i read all that. Conclusion? lol regards Link to comment Share on other sites More sharing options...
veilsideTT Posted January 9, 2004 Share Posted January 9, 2004 I have a full nur spec with the blitz second cat removal pipe. I tied my sensor up as was nowhere to put it. I was told that the second sensor is just a cat temp sensor and is not needed. Admittedly, my engine is in pieces now due to a spun bearing and cracked crank. I would not say that the two are related! At least I hope not! I will say that on inspection of my internals (Pistons, valves mainly) there was a major build up of carbon even though the engine had only done 5000miles since a full rebuild. Could the car have been Over/under fuelling due to this sensor sending incorrect signals to my ecu, causing a build up of carbon on everything? Im not an expert when it comes to fuelling.. . . . . . . . .Anyone care to add to this? Link to comment Share on other sites More sharing options...
dude Posted January 9, 2004 Share Posted January 9, 2004 Geeza looking at your last post that may account for the strange smell from your rear end !!! Dude:flame Dev Link to comment Share on other sites More sharing options...
veilsideTT Posted January 9, 2004 Share Posted January 9, 2004 your pissed cause i flamed your beloved J-Spec. I was jus messin dude. Com-on, help me out here? Link to comment Share on other sites More sharing options...
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