BOV Killing Motor Gen 2&3 coyote
Gen 2&3 Coyotes.
I have been battling some issues on turbo and pro charger cars wanting to shutoff after the BOV opens. This is limited to unlocked converters and is worse when they?re loose/high stall.
I do not believe MAF placement is the issue as this has occurred on a couple of vehicles now. One is my Gen 3 single turbo car and the other is a f1a94 pro charged gen 2 both with loose nonlockup setups.
Is there something to look at to get it catch itself and not die after the bov opens. Normal decel is okay but letting off after boost makes them choke down around 400rpm and maybe they recover maybe they don?t.
Tunes and logs can be added at request. Writing this on the road or I would?ve included them now.
2 Attachment(s)
Solution? Or Work Around?
Ok, so after hours of just changing stuff. Yes, that was the method, here is the latest tune. If anyone could offer their opinion on why this worked that would be amazing. I know very little about the dashpot multipliers/modifiers but apparently they do stuff that matters as that is what solved this gen 3 car wanting to die on decel. It was actually not only wanting to die after a BOV event but also on free revs (just not all the time which was weird). I have not gotten the chance to drive this tune up yet but it doesn't die off the chip and doesn't die when free revving so hopefully that's good news.
Notes: Covers all the differences between this file and W24 that solved (for now) the issue
Turning idle airmass switch off made it go back into idle corrections faster from what I could tell. Minor positive affects
Normal dashpot mult had minor effect but kept it inline with others
Target N mult had largest changes. Setting to 0 made return to idle much slower/smoother but caused issues with transition to getting back on pedal (think I solved this later)
ADFSO mult seemed to have change when rpm was falling fast or when there was a wide swing in load. Helped transition off of 2 step.
Solution to Target N issue was to 0 out the Launch Airmass Mult. Allowed me to footbrake again and would not close throttle after a rev or on footbrake
Idle feedback enable at 2000 was for it to catch it sooner, definitely helped. Set lower limit to 400 to keep PID system active as a stall saver (may actually be hurting IDK)
Max correction at 100ftlbs as an oh shit save me, same with torque reserve and dash pot rate settings
Torque table changes made it idle in lower spark and more throttle which helped a little but was not the solution, left it this way because it didn't hurt. Still don't have a method that I use everytime on the torque models so gonna try this and go from there
Friction torque was put back closer to stock as it wasn't helping the issue
Wall of 30* was removed from spark tables but did not solve the issue. I could see how this can cause issues with torque calcs and left it gone. Other changes were to help it on the brake and it now it makes 10.5 pounds in under 4 seconds (record for this car)
Cranking fuel is self explanatory
ETC model changes I made by logging ETC error. This will probably be put back to stock at a later date or be continued to be modified based on new data from driving. It is a stock throttle body but I will see what happens down the line or if y'all have suggestions I am all ears
Attachment 139843 Attachment 139844