Too much boost and engine load.

[StealBlueSho]

Ok... so I looked at the logs...


First, you are hitting 20psi because your tune is calling for 19.09psi at WOT.... so you are getting an initial spike of 20psi and the car is trying to hold 19psi...

Second, your AFRs are holding what is being called for.. so during the first portion of the run you are holding .80 lambda but at the end you hit .65 lambda.. again the tune is calling for this so the car is doing it.. actually the tune is calling for .58 but you are only getting to .65....

Third, your Short Term Fuel trims are all over the place during that run... its compensating for something it doesn't like....

Fourth, your wastegate duty cycle looks OK...

Fifth, your throttle is closing during the run.. your trims are pushing +14% which COULD be why but I have seen worse (mine) without the closing... could be in the tune to control the load? Dunno..

Have you flashed your F150 with a new tune lately? It looks to me that everything that is going on.. is because the tune is asking for those things... I am not a tuner, but thats funky to me...  I would send the log to your tuner and see what they say before I investigate anything physically with the truck IMHO...

[StealBlueSho]

Sixth, I suspect the knock is because your pushing that much of a load... nothing funky there, just a symptom of a lot of load...

Seventh, you spark is NEGATIVE through the whole run... I have never seen that....

Again, looks a lot like the the tune is dorked up...

[StealBlueSho]

Eighth, the fuel pressure is dropping so bad because your car cant keep up with the load being requested and the requested afr (LAMBASE) at the same time.. something has gotta give and the fuel pressure usually goes first since the car tries to do everything it can to keep LAMBASE ....

[Boosted150]

Thanks a lot!! Yea spark going negative is weird comparing to my track log a few months ago. I did have my tow tune on for two weeks and put my performance tune back on about a week ago but never had anything like this happen iv ran probably logged 6-8k miles on this current tune. Here's anther 1/4 mile log of the same tune from August defiantly looks a lot better.

[SHOdded]

I am sure all tuners are now aware of the cold weather issues, but there is an ambient temp drop of 20F, plus possibly a winter gas issue involved.  In CO, you only get 91 right?  So running "91" gas might not be enough anymore.

[StealBlueSho]

Ok, so that good run is a full multigear run... Interesting though that you are saying you dont normally see 20PSI but in the good run you are spiking that high as well. Actually, the good run looks very similar to the bad run you sent as far as load, boost, timing, etc... being a mile high above sea level explains the high WGDC numbers... air is thin up there...

I would agree with the SHOdded on this one, looks like the winter gas is killing your fuel pressure and giving you knock issues now.

Your tuner is giving you BIG boost and little to no timing advance.. probably much less than stock? I have not seen timing that low on a Ecoboost datalog before, but to be fair, I don't normally look at the F150 datalogs...

I would run that bad boy stock until the summer blends come back IMHO

[ZSHO]

I would suggest trying a fuel stabilizer or octane booster which have proven to have negligible results for winter-blend gas and monitor for any changes. Z

[AJP turbo]

Steal blue is is pretty accurate with the assessment...It's a pretty unrefined tune if tuned at all...Desired TIP is all over the place along with commanded AFR...Fuel enrichment looks like it was left stock along with the commanded boost..Maybe just globally increased.

Spark on a lot of ecoboost engines is really low compared to the SHO but there is a big difference between the logs

I would be comfortable running that with those huge dips in fuel pressure.

I wouldn't be so quick to say it's just winter fuel...Could be a lot of less than ideal things adding up to a problematic tune.

[Colorado-SHOBro]

boosted150- i'm in CO as well and have a couple stations that i know have verified good fuel. i'm tuned by AJP and fuel quality hasn't been an issue-even as of late with possible winter blends.what part of town are you in? id be happy to share.


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[Colorado-SHOBro]

i would say i think the issue is with your tune overall-but getting good fuel would rule one thing out at least


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[Boosted150]

I am sure all tuners are now aware of the cold weather issues, but there is an ambient temp drop of 20F, plus possibly a winter gas issue involved.  In CO, you only get 91 right?  So running "91" gas might not be enough anymore.

Yes we only get the crap 91 octane.

Ok, so that good run is a full multigear run... Interesting though that you are saying you dont normally see 20PSI but in the good run you are spiking that high as well. Actually, the good run looks very similar to the bad run you sent as far as load, boost, timing, etc... being a mile high above sea level explains the high WGDC numbers... air is thin up there...

I would agree with the SHOdded on this one, looks like the winter gas is killing your fuel pressure and giving you knock issues now.

Your tuner is giving you BIG boost and little to no timing advance.. probably much less than stock? I have not seen timing that low on a Ecoboost datalog before, but to be fair, I don't normally look at the F150 datalogs...

I would run that bad boy stock until the summer blends come back IMHO

My bad I guess I should look into logs more still new to data logging, I just never have never seen 20 lbs and load over 2 on live wire programmer screen maybe it's off a little or something. And rarely seen knock levels above 2 under wot.

boosted150- i'm in CO as well and have a couple stations that i know have verified good fuel. i'm tuned by AJP and fuel quality hasn't been an issue-even as of late with possible winter blends.what part of town are you in? id be happy to share.

I live in Thornton yeah I would love to find some local ecoboost guys or tuner shop is AJP local?

i would say i think the issue is with your tune overall-but getting good fuel would rule one thing out at least

Yes I put the truck back to stock will be talking with my tuner again but I have a quarter tank left to run out before I can refill.

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[Colorado-SHOBro]

i'll pm you with a reply boosted150. don't want to clutter the thread.


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