Sobshotta Posted June 9, 2020 Share Posted June 9, 2020 I recently built a forged 4efte on speedvision cams but no matter what I do it runs rich. I changed the injectors back to the stock ones checked the map sensor stock ecu and even my greddy ultimate and it still reads rich. Any idea on what's causing the problem? Quote Link to post Share on other sites
5T4R7ET N/A Posted June 16, 2020 Share Posted June 16, 2020 On first start up the standard ecu runs rich until warmed up. Then it will lean out. I assume you have a wideband AFR gauge to monitor this? Quote Link to post Share on other sites
gibby1980 Posted July 20, 2020 Share Posted July 20, 2020 On 6/9/2020 at 3:33 PM, Sobshotta said: I recently built a forged 4efte on speedvision cams but no matter what I do it runs rich. I changed the injectors back to the stock ones checked the map sensor stock ecu and even my greddy ultimate and it still reads rich. Any idea on what's causing the problem? Rich at startup? Rich while running? Cut some of the fuel from the fuel VE table. Who tuning your car? Quote Link to post Share on other sites
Sam44 Posted July 21, 2020 Share Posted July 21, 2020 (edited) How old is the wide band or are you using a gas analyser. The speed vision cams do promote high rpm power with cam overlap this will impact your low rpm afr, so trimming off the fueling might be what is necessarily. What turbo are you running and rpm range. Edited July 21, 2020 by Sam44 Quote Link to post Share on other sites
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