bigbloodyturbo Posted April 22, 2013 Share Posted April 22, 2013 Has anyone got an LC-1 feeding a 0-5v wideband signal to one of the analogue inputs of a syvecs? I have this and it worked fine for about 30mins of tinkering but since then it now reads circa 2 afr rich. The software says its seeing approx 1volt lower than I know its getting so it's saying i'm at 7-8afr when i'm idling at 10. When sticking a meter on the input of the syvecs I'm getting 1volt to ground. When I have the LC-1 analogue output hooked up to the syvecs i have the LC-1 grounded to chassis (heater and system ground). I have tried grounding system ground from the LC-1 to the ABS/sensor ground on the syvecs but it has not made any difference, it still reads 1volt lower than I know the LC-1 is feeding it. Should I try a unipolar input or does the 0-5v analogue input have a pull up, seems strange for it to pull up 1 volt? Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 25, 2013 Author Share Posted April 25, 2013 any syvecs owners? Quote Link to comment Share on other sites More sharing options...
Wez Posted April 25, 2013 Share Posted April 25, 2013 If no one knows on here you could try on the Syvecs forum. Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 25, 2013 Author Share Posted April 25, 2013 If no one knows on here you could try on the Syvecs forum. Thanks mate, I didn't even think to look for their forum, will try over there. Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted April 29, 2013 Author Share Posted April 29, 2013 just incase anyone has a similar issue this turned out to be a ground offset issue with the Syvecs. Grounded the Syvecs power ground to chassis and everything is now working. Also wasn't helped by the LC-1 analogue ground not actually grounding anything but now all working with the LC-1 system and heater ground grounded together. Leason learned, check one's grounds:innocent: Quote Link to comment Share on other sites More sharing options...
Wez Posted April 30, 2013 Share Posted April 30, 2013 Nice one Quote Link to comment Share on other sites More sharing options...
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