I think this is it, Torrie got this nailed down after 8 revisions. Here are 3 pulls on Rev08. He replied that they were the best curve yet and didn't send a revision. I did ask why the fuel pressure looks so good compared to the others, you will notice that big dip we have been talking about is gone in all three of these logs, and it feels amazing. I will share his reply when i get it.
Help me read my logs
- Thread starter Scott4957
- Start date
Those are much better runs but I think the reason the rail pressure doesn't drop out its ass it because the load/timing/boost is not as high. Curious though, I did see the throttle closing up in fourth at 14.5 seconds in the first run and second run. The third run has it closing up in third.
I have seen similar stuff in mine. I was seeing fuel pressure down to 1100 PSI in third gear under a load of 2.03 and boost of 20psi+ and having the ecu close down the throttle. But that only happens when I go WOT from a roll around 45mph-50mph. My 0mph-80mpg or so doesn't have the problem but I am seeing loads around 1.8 and not 2.03+. Every tune revision I have received the load is being dropped slightly.
However, after countless hours researching what other people are doing, it APPEARS that our HPFP just have a hard time keeping pressure when the load exceeds 1.8 and supplementing with WM seems to assist. And there is a variance to how well the HPFP keeps pressure per car and that is also a known issue.
SO I would think from a SCT standpoint there is going to be varying tunes to accommodate the tolerances in our cars which is expected. That is the reason I went with Torrie. I would be VERY curious as everyone else is as to what LMS datalogs look like to see if they exhibit a similar behavior. Since they send the same tune to everyone I would image the ECU does some correcting on some of the cars out there.
I will caveat this by saying I am not expert in these things, just attempting to put 1+1 together lol
I am very curious as to what Torrie says, please keep us updated?
Did you ever reset the KAM on yours? SCT X4 apparently does not do that when re-flashing a new tune from what I am reading... I could be wronng
I have seen similar stuff in mine. I was seeing fuel pressure down to 1100 PSI in third gear under a load of 2.03 and boost of 20psi+ and having the ecu close down the throttle. But that only happens when I go WOT from a roll around 45mph-50mph. My 0mph-80mpg or so doesn't have the problem but I am seeing loads around 1.8 and not 2.03+. Every tune revision I have received the load is being dropped slightly.
However, after countless hours researching what other people are doing, it APPEARS that our HPFP just have a hard time keeping pressure when the load exceeds 1.8 and supplementing with WM seems to assist. And there is a variance to how well the HPFP keeps pressure per car and that is also a known issue.
SO I would think from a SCT standpoint there is going to be varying tunes to accommodate the tolerances in our cars which is expected. That is the reason I went with Torrie. I would be VERY curious as everyone else is as to what LMS datalogs look like to see if they exhibit a similar behavior. Since they send the same tune to everyone I would image the ECU does some correcting on some of the cars out there.
I will caveat this by saying I am not expert in these things, just attempting to put 1+1 together lol
I am very curious as to what Torrie says, please keep us updated?
Did you ever reset the KAM on yours? SCT X4 apparently does not do that when re-flashing a new tune from what I am reading... I could be wronng
There is a setting in options on the handheld to clear your KAM.StealBlueSho said:
Here are some of my logs...5,6,7 and 8,9,10 are different revisions 8-10 being my current.
5 is weird because I left TC on.
On your stop log I noticed your pressure tanks about 4K rpm in 1st, that is something I've never seen before and my drops are always after upshifts.
Torrie says he was just commanding too much boost early on in the revisions and was testing to see how the car/tune would react. I think that was the conclusion we came to by looking at load. Yes, to the statement on meth, its more fuel for an engine/fuel system that can't keep up. Its always going to be this way, either you run out of fuel or boost, so too small on the fueling side or the turbo side. On Mazda's DISI it was the turbo, you could get another 50+ HP out of the fuel system with a larger turbo, then you resorted to 5th and 6th port which is essentially the same as using Meth for fuel on the EB. I suppose if I had to pick one it would be running out of fuel as it cost less to supplement the fuel system than to upgrade the turbos but their are advantages to both.
I'm now trying to get is opinion on E mixes vs Meth. I would do both if I went with an E tune but I am considering skipping over it and moving to Meth.
I'm now trying to get is opinion on E mixes vs Meth. I would do both if I went with an E tune but I am considering skipping over it and moving to Meth.
FoMoCoSHO said:
Thank you for sharing your datalogs. Interesting, your datalogs also have a drop around 4800RPMs in second and again in third. Dropping sometimes down to 9.12 Mpa with a load of 1.82. I have some datalogs that are similar but my throttle starts to close.. there is something funky going on with mine I think... just trying to nail down what it is... here is another one of my logs that shows similar load/rail pressure but my ecu starts to close the throttle...
I took the car to my local ford dealership to see if they had away to test to the HFPF, LPFP. etc.. they said it wouldn't make any difference what its doing if the car is tuned since they don't know what to look for. The FORD RDS system might provide some insight they said but they want $200 or so just to run it on the RDS...
Now, my buddy who used to be a mechanic for Ford said I should replace the fuel control module behind the right rear passenger seat and see if that doesn't help. He seems to think that with only 47K miles it would be strange to have a HPFP or LPFP issue..
Im going to try and catch up on some of these logs tonight.....i doubt there is anything wrong..load/boost spikes on upshifts...when load gets up over 1.8ish you will lose fuel pressure because the pump wasnt designed for that...its simple...stock load will cap around 1.5 ish...1.8 is starting to get high...you are tapping the rail out of fuel because injector duty cycle increases....and it doesnt matter if you get bigger injectors...alll that means is they deliver the same fuel at a lower pulse width...you need what you need fuel wise....and you mean IDS not rds
Throttle is closing because you are exceeding one of the various torque limiters.....look at desired tip vs map
Throttle is closing because you are exceeding one of the various torque limiters.....look at desired tip vs map
AJP turbo said:
Thank you for your help! I have terrible hearing so the Ford tech said IDS and I hear RDS... Wife complains about the same thing...
Yea, I am just not convinced there is a hardware issue since my datalogs don't appear to be too off from what the others are. Torrie thinks there is an issue somewhere in the fuel system... Either that or I am doing something wrong on my end...
I was hoping not to bother Torrie. Really.. I was hoping someone more familiar than myself with reading datalogs would look at mine and have an "Ah Ha!!" moment. Especially since Scott was having a similar problem. I hate snowflakes....FoMoCoSHO said:
Sent from my Nexus 6P using Tapatalk
Scott4957 said:
I apologize, poor choice of words. Not a similar problem but similar characteristics. However, looking at all the datalogs that have been posted, everyone sees a dip in fuel pressure around 4700-5000 rpms when the load is highest. The snowflake I am seeing in mine is the drop in first gear as someone mentioned earlier.
StealBlueSho said:I was hoping not to bother Torrie. Really.. I was hoping someone more familiar with reading datalogs would look at mine and have an "Ah Ha!!" moment. Especially since Scott was having a similar problem. I hate snowflakes....FoMoCoSHO said:
Sent from my Nexus 6P using Tapatalk
There are some members that have had over 20+Revisions from Torrie and IMO would not hesitate to contact him especially if you think its a fuel system related issue because thats where customer service comes to play. Z
Just got my revision #17 and the car feels beasty like it gained a lot of hp or something for sure! The weird thing is there isent much noise from the turbos like before so that probably means boost was turned down but the car pulls harder!
Sent from my SM-N910V using Tapatalk
Sent from my SM-N910V using Tapatalk
