Getrag Posted December 15, 2004 Share Posted December 15, 2004 Ok, go easy on me here if im talking out my arse, in which case just explain to me how it really is. On a modified car with a straight, one piece decat with no lamda sensor. How does the stock ecu monitor and regulate the air and fuel. Or does it just go to a standard map. Thanks. Quote Link to comment Share on other sites More sharing options...
SimonB Posted December 15, 2004 Share Posted December 15, 2004 The lamda sensor is before the first cat. There's a second one on UK cars in the 2nd cat pipe but not on J specs. The sensor you remove when you take the cats off a J spec is a cat temperature sensor which you can just tie up out the way. I believe you can get away without the 2nd lamda sensor on UK cars, but you're better off using one of Chris Wilson's pipes which have a hole for it. Quote Link to comment Share on other sites More sharing options...
Getrag Posted December 15, 2004 Author Share Posted December 15, 2004 Ok, so on a car with a one-piece decat pipe and no lambda sensor part to it. How does the ecu work then? Or is it just a temp sensor and it doesnt really matter? Yes its a jspec. Quote Link to comment Share on other sites More sharing options...
tDR Posted December 15, 2004 Share Posted December 15, 2004 Originally posted by Getrag Ok, so on a car with a one-piece decat pipe and no lambda sensor part to it. How does the ecu work then? Or is it just a temp sensor and it doesnt really matter? Yes its a jspec. Anything to do with your RAC report? Remember, he'll have a guide on a uk spec if anything.. The lambda on your car will be on the turbo elbow afaik, so you should be able to see it under the bonnet - just looks like a metal plug going to a wire going to an electrical connector. HTH, Brian. Quote Link to comment Share on other sites More sharing options...
SimonB Posted December 15, 2004 Share Posted December 15, 2004 Originally posted by Getrag Ok, so on a car with a one-piece decat pipe and no lambda sensor part to it. How does the ecu work then? Or is it just a temp sensor and it doesnt really matter? Yes its a jspec. Exactly, it's just a cat overheat sensor that does nothing apart from light a warning light if it gets too hot. The lamda sensor is just before the first cat like I said. Quote Link to comment Share on other sites More sharing options...
Getrag Posted December 15, 2004 Author Share Posted December 15, 2004 Thanks Simon, so no worries there then.... Yeah, the RAC really do a thorough check on cars... Quote Link to comment Share on other sites More sharing options...
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