2012 caprice l77 6.0 had headers and a 3in exhaust having and issue with the idle diping when I come to a stop. idle is commanded at 650 but when I come to a stop it drops to around 400 then catches itself. found at 6:09:40 in the log file
it seems like you run it MAF only, i'm not sure where is the problem but i found that the car commanding 10.9 - 10.4 AFR and at the same time the EQ ratio is 1.00 lambda! and another point which is if the car is super rich at low RPM it could drop the RPM down because there is a lot of fuel in it.
Reply With Quote