cheekymonkey Posted May 4, 2008 Share Posted May 4, 2008 Am looking over my new "project Overkill" which has a stock TT engine fueled by a Motec M800. Plan A is to remove this ECU but before I jump into doing anything I'm going to find out exactly how it's connected and what it's doing. Before I start stripping things down and tracing cables I wonder if someone could take a look at the attached pic? I've highlighted two sensors which I believe are non-standard and hooked in to the Motec. Have I ID'd these correctly as IAT and MAP? Quote Link to comment Share on other sites More sharing options...
bignum Posted May 5, 2008 Share Posted May 5, 2008 Map yes, iat?, i thought j,spec`s had iat on the other side of the plenum. Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted May 5, 2008 Author Share Posted May 5, 2008 Map yes, iat?, i thought j,spec`s had iat on the other side of the plenum. Cool thanks. I know j-specs have IAT sensors as standard but maybe the motec can't use it for some reason. The invoice I have says that the following were fitted: Motec Loom Air temp sensor Coolant sensor Map sensor So am assuming the sensor that I don't recognise must be the Air temp one... Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted May 5, 2008 Share Posted May 5, 2008 Yup GM 3bar map sensor and a GM MAT sensor Take a pic of how the ecu is wired in mate as i will be able to tell you how easy it is going to be converting back Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted May 5, 2008 Author Share Posted May 5, 2008 Yup GM 3bar map sensor and a GM MAT sensor Take a pic of how the ecu is wired in mate as i will be able to tell you how easy it is going to be converting back Thanks mate I'm also going to try and resurrect one of my old laptops that has a parallel port and stick the Motec s/w on there. I have the CAN cable for the ECU Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted May 5, 2008 Author Share Posted May 5, 2008 Looks like it will be a bit of fun to revert this lot back. Doable, I'm sure, but a PITA! I've circled some wires that have been cut rather close to the ECU connector Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 5, 2008 Share Posted May 5, 2008 Plenty of room there, (those are the injector driver leads). With patience even I could do it, and I am not into rewiring stuff Sensor is a intake air temp probe. I think the M800 software will run a stock wastegate control solenoid. Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted May 5, 2008 Author Share Posted May 5, 2008 I think the M800 software will run a stock wastegate control solenoid. That was my thought given that this car seems to be running 1.3 bar according to Dyno sheets, with the 1st cat still fitted. This car is also running TTC mode, with the EGCV actuator permanently wired open and I think some of the stock sequential stuff has been removed - see pics. Can you tell what's been done from these? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 5, 2008 Share Posted May 5, 2008 Looks like the sequential system has been disconnected, don't know why, the M800 will drive the sequential, and VVTI including FBW just fine. Looks like the water pump is / has been leaking. They fitted a Bosch WT sensor, too, rather than calibrate for the stock one, which is perfectly easy. Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted May 5, 2008 Author Share Posted May 5, 2008 They fitted a Bosch WT sensor, too, rather than calibrate for the stock one, which is perfectly easy. Thanks Chris, I wondered why they did that - and the same for the IAT. Would the stock IAT also work with the Motec as far as you know? Quote Link to comment Share on other sites More sharing options...
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