Originally Posted by Jhill

Yea the graph isn’t helping me much, it’s hard without being there to get a feel and then have the graph re affirm my suspicions side from that it only shows what’s happening and not really a “why”. The part that stands out to me as odd is it not running well with the mafs disconnected. As I said I’ll have to test it on my own to reconfirm but I have never had a car not run “well” with mafs disconnected (like you’d be hard pressed to even know the maf was disconnected aside from the MIL). To me that feels as if there is something way beyond spec causing an issue. Typically as I said from what I’ve seen is the manufacturer has a pretty damn good idea of how the engine should run just from countless hours of bench testing and they build a pretty good map around that (like an alpha n tune) then the other sensors really fine tune it in but without mafs it runs off the data they’ve gathered that they can be fairly certain will allow the engine to run “well”. Hopefully that makes sense.