With a doubt every single time I go to the petrol station and fill up with whatever amount I always get rough idling and my car backfires like crazy when I'm off the throttle.
I get rough idling from time to time but when I really notice it is on humid days. Sometimes my car just will not idle after I let go of the throttle, I would have to gently bring it to idle.
It is driving me nuts!!!
Belive me I have been under the hood checking for leaks, testing the electronics pulling apart and cleaning.. Im missing something...
But there is one thing I noticed. On my safc I noticed when my idle plays around my airflow readings is different instead of idling at 750 rpm with afm reading of 0.9 it would be 1.1-1.4 ... Im thinking maybe my afm is effected some how by humidity but if does not explain the filling up problem. My guess atm is maybe the fuel regulator or pump but I'm not going to spend $$$ on a hunch. Has anyone go any ideas...
btw my safc is tuned for 4500 revs and above so this has no effect.