I really need to get my hands on a 2015-2017 calibration file I can look at in HPtuners, but from my experience calibrating a Focus ST there is a tip in fueling table that richens it up. You could lean that out or simply get rid of it altogether.I'm curious to see another stock car's datalog under normal driving. Is a rich throttle tipin like both of us are seeing definitely abnormal? And if it's not, what can be done to correct it?
Yes they do. That's exactly how the 2008 Bullitt makes more/less power depending on octane.A 2008 4.6 is an entirely different animal from the 5.0. I don't believe the knock sensors allow timing to be adjusted on those cars.
i can't think of anything else to check out....
I took a good long log on the way in and will upload it later today to show what kind of activity I'm seeing.
LTFT and STFT are fine. There was a very very small positive knock event (start of second pull). To look at transient fuel, You would need to log MAP and lambse. Lambse would tell you if those rich tip ins are commanded or not.I unplugged the CMCV connectors and the only difference I saw is the car ran funny. reduced power down low and weird surging. It also idled with total spark much higher. 25ish degrees compared to the usual 10. Still saw the same kind of sporadic small knock activity, though.
I plugged them back in and took a short log making a few WOT passes with some hard gear changes. I saw the same kind of knock activity there as I do everyday driving. Sometimes I see a brief blip as soon as I roll into the throttle after a shift, other rimes nothing. I did notice that if I get going around 2500 rpm in second and stab the throttle, sometimes i'll see a brief blip of knock there as well, too.
All the knock seems to be related to the engine torqueing, but it quickly goes away. If I was seeing false knock from the exhaust touching the body somewhere, wouldn't you expect to see the knock stay for longer?
Short log attached here (although this shows no knock at all...like i said, its very intermittent) and I'd love input on how this looks overall in regards to fueling and everything else.
https://datazap.me/u/manbearpig/log-1510516664?log=0&data=1-16-18-28&zoom=966-1413
I sent an email to Lund asking if the rich tip-in is being commanded. I see this on the stock tune and their tune so I suspect it is being commanded. Hopefully they'll be willing to tell me but I'd love to see logs from some other cars to compare.LTFT and STFT are fine. There was a very very small positive knock event (start of second pull). To look at transient fuel, You would need to log MAP and lambse. Lambse would tell you if those rich tip ins are commanded or not.
I pretty much dont worry about it unless I see knock while accelerating. I've tried to chase down the cause of my false knock myself, have had two shops check, and have done a compression test, new plugs, etc.I happened to glance over and see the ngauge register a 2.6* knock on the drive to work this morning. I had just shifted into third gear, driving casually. I accelerated harder and it stayed at 2.6* until I had to let off due to traffic. I stayed in the throttle a good 3-4 seconds to see if it would go away but never did. Mostly I see small stuff go away knots immediately but every now and then I'll see much larger values that stick around. I never have captured something like this on a datalog though. I'm tempted to just take my ngauge out because it seems the car is just going to do this whenever it wants and I can't figure out why.
I've changed plugs too but haven't checked compression. I suspect it's fine as the car had less than 10k miles and no behavior I'd attribute to serious damage.I pretty much dont worry about it unless I see knock while accelerating. I've tried to chase down the cause of my false knock myself, have had two shops check, and have done a compression test, new plugs, etc.
If it's not knocking while you're in load it should be false. I'd rather it not do it, but I can't seem to stop it so :shrug:
Sounds pretty much identical to mine, but yours may be even more significant. 75% of the time I see less than 1*. Sometimes I see more but it's almost always less than 2*. About 1* of the time I'll see 3-4*So I have a similar issue. It all started when I put on Texas Speed catless headers. It’s intermittent but never at WOT and almost as I’m am going into a new gear. I’ve see up to +4.89 on my HPTuner going from 3rd to 4th at like 35 mph at 2200ish RPM.
I’ve replaced the header that I think the pipes were vibrating together. Bought an entirely new exhaust. Took the engine cover off. Removed the catch can. Had a 3rd party completely retighten the header bolts and exhaust. Removed the Mishimoto Coolant tank and put the stock one back on thinking it was vibrating against the UPR check valve. Etc etc. the list goes on. Still have it.
I had a similar situation where I found a slightly loose engine mount bolt and thought for sure it was the issue and still have it. Unsure where to go from here. It is only when dead stopped and revving to start moving or shifting from 2-3, 3-4, or 4-5 when I get back on the gas. It is so inconsistent that it has to be false. Just don’t know what is causing it. MT82 transmission 2016 PP.