Hesitation in boost and high rpm

Thanks fellas. You guys are seriously generous and helpful on here. Honestly I was just looking for some possible leads and am getting offered much more than expected. So thanks to you all. My contacts at LMS always seemed to be someone different. Including through emails. I have to check my email history to tell you for sure.. But they definitely act like this is some super odd issue.
 
StinkinLinkin13 said:
I forgot to ask about this? What exactly is the 93 CW tune? I feel like I should probably know this. But Im afraid I don't.
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I'm pretty sure CW is just "Cold Weather"

Sent from my XT1650 using Tapatalk

 
The 93-V7CW-Tune IIRC was introduced a few years ago which was a band-aid-temporary fix for those who suffered a slight hesitation during the cold winter months primarily with the crappy winter-blend fuel which the CW Tune kept the throttle blade at various points and open it much slower to keep from having the issue! 

In general I have always added a bottle of Heet to every tank fill-up preferably the (yellow bottle) to combat the winter-blend fuel without any hiccups to mention!  Z  :)
 
Good info. So my captain obvious question of the day is... Does no one get their car tuned in winter while using this winter fuel? If that is the culprit I just figure it would have been settled by now. I mean these guys are in Michigan and their winter is a lot harsher and longer than mine here in Texas. Its almost 70° today. Idk. Maybe I will try some good additives and see how that goes. If that really is it then its a bit of a relief. We will see... Although LMS themselves didn't recommend the use of any when I asked previously when I originally heard this was a potential cause of the issue. The CW tune seems like a down tune and I can basically mimic that by just not going full on wot. Which is basically what I've been doing in the meantime. And its kind of a rip.
 
I use Sheetz 93 e10 fuel exclusively (so far), and logged/revised with Brad during the heat of summer, and the winter grade fuel here in northwest central PA didn’t have an effect on my tune.  I log at least once per fresh tank of fuel just to keep an eye on possible KR or other issues, and have if anything seen a drop in any KR and it adds some spark.  I’m assuming that’s due to the IAT2 being lower from the lower ambient, but I’m just speculating.

I’ll echo polski and others by saying, Brad will certainly take care of you. 
 
StinkinLinkin13 said:
Good info. So my captain obvious question of the day is... Does no one get their car tuned in winter while using this winter fuel? If that is the culprit I just figure it would have been settled by now. I mean these guys are in Michigan and their winter is a lot harsher and longer than mine here in Texas. Its almost 70° today. Idk. Maybe I will try some good additives and see how that goes. If that really is it then its a bit of a relief. We will see... Although LMS themselves didn't recommend the use of any when I asked previously when I originally heard this was a potential cause of the issue. The CW tune seems like a down tune and I can basically mimic that by just not going full on wot. Which is basically what I've been doing in the meantime. And its kind of a rip.
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Being in a southern state your formulation is probably different (read better) than the harsh winter states.



 
StinkinLinkin13 said:
Good info. So my captain obvious question of the day is... Does no one get their car tuned in winter while using this winter fuel? If that is the culprit I just figure it would have been settled by now. I mean these guys are in Michigan and their winter is a lot harsher and longer than mine here in Texas. Its almost 70° today. Idk. Maybe I will try some good additives and see how that goes. If that really is it then its a bit of a relief. We will see... Although LMS themselves didn't recommend the use of any when I asked previously when I originally heard this was a potential cause of the issue. The CW tune seems like a down tune and I can basically mimic that by just not going full on wot. Which is basically what I've been doing in the meantime. And its kind of a rip.
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As FoMoCoSHO mentions each area is different.  The blend they use in Michigan may be better than I have out here in WA due to environmental factors of Govt views on ethanol.

I tuned my car out here in late Feb, early march of last year.  It was not intentional, it was just when I got the car and bought a tune.  As others have mentioned I whole heartedly recommend AJP.  His tunes are off the hook, and he really takes the time to not only keep you the owner informed, but also diagnose each car individually.  Him offering to let you pay later if happy with tune I think proves how he wants to make sure customers are happy and his tunes are dialed in.
 
Have you reached out to LMS lately ?  or have they reached out to you for a probable fix to your underlying issues on your newly acquired 13 MKS!!. 
In any event you need to make sure your vehicle is running to its fullest potential as mentioned by others before installing a tune!

In my case needed to change both my front primary 02 sensors @ 50K because they weren't responding correctly prior to having a Dyno Tune performed!  just some food for thought my friend!  Z
 
AJP turbo said:
An X3 would be your cheapest bet if you find one used....I sell devices but only new ones.
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I have a SCT Tuner that I am getting rid of that I used to tune the Lincoln LS that I sold last summer.  Bought an X4 to tune the SHO  I think it is an X3 but there is no marking on it.  All I used it for was to load tunes so I have no idea what data logging capabilities, etc. it has.  If you are interested let me know.  I was going to purge it with all the rest of the LS stuff this spring.
 
Actually not yet. I'm checking for possible fuel supply "starvation" issue right now. I was actually looking for specs on minimum pressure but don't have access to all data like I used to. I was looking at my pressure last night and saw it drop to around 800 psi during WOT (as misfires occurred).. Idk what the minimum "norm" spec is however. The other thing I'll mention is that it seems very inconsistent. Even within the same tank of gas from one day to the next. Its always there but sometimes its worse than others. Thanks for asking.
 
You are most likely chasing a ghost....Polski checked his entire fuel system...low pressure from the lift pump will be between like 55-110 psi and the high pressure varies but at wot generally 2000 is the target so less than 1000 is more than a 50% reduction and generally not good for direct injection.

Your worst fuel pressure will happen on the 2-3 wot upshift

Have you heard back from LMS?
 
Yes. They want me to try a less aggressive tune. But I'm personally a kinda a balls to wall guy. I want to squeeze the most out of anything I own... 😋 I have to be certain on my end there is no issue on my car. It does kinda seem as if "something" (fuel ignition timing o2 sensors) is pegging out with the tune parameters. Maybe the tune is too aggressive or maybe something on the car is on the fringes of spec. It's just odd that most people seem to not have an issue. But there are definitely those of us that do. Plus the fact that LMS sells a HPFP of their own leads me to wonder. But at 1600 dollars and no guarantee in benefit for us on this "conservative" tune. Its just crazy. That cost more than all my mods combined.
 
StinkinLinkin13 said:
Yes. They want me to try a less aggressive tune. But I'm personally a kinda a balls to wall guy. I want to squeeze the most out of anything I own... 😋 I have to be certain on my end there is no issue on my car. It does kinda seem as if "something" (fuel ignition timing o2 sensors) is pegging out with the tune parameters. Maybe the tune is too aggressive or maybe something on the car is on the fringes of spec. It's just odd that most people seem to not have an issue. But there are definitely those of us that do. Plus the fact that LMS sells a HPFP of their own leads me to wonder. But at 1600 dollars and no guarantee in benefit for us on this "conservative" tune. Its just crazy. That cost more than all my mods combined.
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Sounds like your car has identical symptoms to my car.

Does your ECU match to mine? (Found on sticker under windshield cover)

P/N: DA5A-12A650-BB
H/W:DA8A-12B684-AA

 
StinkinLinkin13 said:
But I'm personally a kinda a balls to wall guy. I want to squeeze the most out of anything I own.. It does kinda seem as if "something" (fuel ignition timing o2 sensors) is pegging out with the tune parameters. Maybe the tune is too aggressive or maybe something on the car is on the fringes of spec.
Click to expand...

It’s not wise to ignore what your car is telling you...you may be a balls to the walls type guy but if your fuel pressure drops and you have s severe knock event that cracks a piston is it worth it, especially when the car was warning you

And you are wildly reaching and speculating on the idea that your tune is on the fringe of what some of the sensors can see or measure...ive said this before but honestly if I made a tune with LMs boost levels I wouldn’t even tell the customer that a 3 bar map sensor is necessary even with boost spikes....

I don’t really enjoy giving kudos to LMS but I do like giving facts and debunking myths when I can....not all cars are equal for whatever reason..you really need some good datalogs.

What is your strategy? Id like to compare it to polskis



 
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