DaveSupTT Posted May 12, 2009 Share Posted May 12, 2009 Hi guys, I currently have a GReddy EGT gauge inside my car, which at the moment I am not sure if the sensor is duff or not! (as it just so happens that it wasn't connected up, it was just dangling down under the car!) As most of you know, I am in the process of doing my engine build, and im due to be putting the engine back into the car hopefully over the next bank holiday ! but before i do so I want to fit my gauges. I currently have a GReddy boost gauge (fitted), and a GReddy EGT gauge (fitted - kind of!), and i will be getting an AFR gauge as well, not sure which one yet. My questions are: 1) Is there anyway I can test if my current EGT sensor works, without fixing it into the car. When the engine was in etc and I was driving the car, the dial did light up, but the needle didn't move? Now this could be because it wasn't connected correctly, or it could also be duff hence why it wasn't connected up? Id like to check this out prior to fitting it back in! 2) If the sensor of the EGT is broke, can I get a replacement, and if so does anyone know where from and an idea of cost? 3) When I come to fit my AFR gauge, what is the best position to place the sensor? I dont suppose there is a link on here anyone knows of which explains fitting instructions. I checked the technical glossary but couldn't find anything. Also if there is fitting instructions for the EGT guage, that would be useful, so I can check that has been put in the right place. Thanks again guys! Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 12, 2009 Share Posted May 12, 2009 As for testing you cant do so without applying heat to the sensor, they work on a voltage difference (very small) they are also very definitely connection sensitive both in polarity and type, or they just wont work, you can replace it with any thermocouple that is the same size and connection, do a search and you should turn up plenty, or give Chris Wilson a call, i think he can get you one. Quote Link to comment Share on other sites More sharing options...
DaveSupTT Posted May 12, 2009 Author Share Posted May 12, 2009 Does anyone have any advise on where to fit the sensors at all? Thanks for your comments above Rick Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 12, 2009 Share Posted May 12, 2009 Sorry forgot on the last post, AFR/wide band lambda sensors are best fitted to the end of the first or the second decat pipe by the weld on boss supplied, preferably no lower than 9 or 3 o/c position, ideally 10 or 2 o/c as water will kill them, and we all know just how much can come out of a Supra. Quote Link to comment Share on other sites More sharing options...
DaveSupTT Posted May 14, 2009 Author Share Posted May 14, 2009 Tricky - Ricky - What do you mean by; "no lower than 9 or 3 o/c position, ideally 10 or 2 o/c " Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 14, 2009 Share Posted May 14, 2009 Tricky - Ricky - What do you mean by; "no lower than 9 or 3 o/c position, ideally 10 or 2 o/c " If you look at the exhaust pipe in cross section, I'm referring to the hands of a clock position that you need to fit the sensor in order to avoid it being damaged by the water produced by the combustion process, which will naturally be at the bottom. Quote Link to comment Share on other sites More sharing options...
Dash Rendar Posted May 17, 2009 Share Posted May 17, 2009 Dave, that car had a new replacement EGT sensor supplied by Nic shortly before you bought it. The gauge had previously never worked while I owned the car, which is why I bought the replacement sensor. Phoenix then fitted it, but never got it working. So it may be that the sensor is okay, but the gauge itself is faulty.. Quote Link to comment Share on other sites More sharing options...
DaveSupTT Posted May 18, 2009 Author Share Posted May 18, 2009 Out of interest do you know if its an Inconel probe? Quote Link to comment Share on other sites More sharing options...
Dash Rendar Posted May 18, 2009 Share Posted May 18, 2009 It doesn't ring a bell. I've been through my old emails and this was the only thing that was on the invoice: EGT Sensor = £68 EGT Sensor Harness = £18 EGT Sensor Fitting = £16 Quote Link to comment Share on other sites More sharing options...
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