Buel Posted November 11, 2022 Report Share Posted November 11, 2022 Hello, Urgent currently at race meeting. G4X monsoon, rained overnight and didn't notice usb cable from ecu was in a puddle of water. Car does not start not start now. Thinking that can't be good. Does this upset the ecu? Can someone assist Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 11, 2022 Report Share Posted November 11, 2022 No I doubt the USB cable getting wet would have any effect. Is the Blue light still on? Quote Link to comment Share on other sites More sharing options...
Buel Posted November 12, 2022 Author Report Share Posted November 12, 2022 Thanks, good to know. Managed to get it started and finished the day. Discovered no TPS signal so disconnected it and it started. As fuel and ignition maps use MAP it performed ok. Not quite sure how a faulty TPS could prevent it from starting but definitely connected no start, disconnected starts. Any thoughts? Car sat outside overnight in a wild storm so suspect water has something to do with it. Car is K24 Honda powered Lotus Elise which has a louvered hatch over motor. Weirdly an ok spark was visible at plug gap while cranking but no sign of life with plugs installed and fuel sprayed into throttle body suggesting the spark disappeared. No backfires, completely dead. Again, thanks for the prompt reply. Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 12, 2022 Report Share Posted November 12, 2022 Would need to see the tune to see if there is anything related to the TPS preventing starting. Someone one might have set up something like a "flood clear" type function where fuel is cut when cranking with 100% TP for example.. Quote Link to comment Share on other sites More sharing options...
Buel Posted November 26, 2022 Author Report Share Posted November 26, 2022 Thanks very much for the replies and apologies for late response. Car was needed for another meeting so eliminated tps as an input but performance was off. Checked tune using compare with the map as it was prior to the issues and as well as the the tps, the fuel table was way off on closer inspection. This had not been touched but was up around 30% off at some points. Nothing else was different. Car is running competitively again and driver (not me) is happy although the situation with accel enrichment and transient spark retard is less than ideal. Running mostly above 5000rpms so not really missed. Last meeting was also in heavy rain and no issues. All very odd, only difference between meetings was tps delete and usb cable end not in water. Cable is now secured better and tps is gone so will see what happens. Thanks Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 27, 2022 Report Share Posted November 27, 2022 TPS is a pretty important input linked to many functions - Idle control, accel enrichment, launch control, gear shift, logging activation, lockouts for many functions etc. I would get one back on there as soon as you can Quote Link to comment Share on other sites More sharing options...
Buel Posted November 28, 2022 Author Report Share Posted November 28, 2022 Thanks, have two months until next outing and my preference is to have a functional tps. Driver couldn't care less as long as it is going good. Quote Link to comment Share on other sites More sharing options...
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