[Terry @ BMS]

Originally Posted by t-800

BTW I’m on setting 4

See if setting 8 makes any difference for you.

[leadfoot]

Water temp was 200+

[leadfoot]

Yeah.. 8 didn’t reduce my low boost issues either

[Terry @ BMS]

What about 3 vs. 4?

[cc61940542]

So，1-4only impact the manifold sensor while 5-8 impact only the pre-throttle sensor？

[Terry @ BMS]

No

[leadfoot]

4 seems to be a little better than 3. But i just got a low boost again today. Thinking of moving to 5 now. Or maybe I should disconnect the JB4 from the upper boost manifold sensor? I’ll likely only ever run on map 2.

[Terry @ BMS]

5 will probably be worse but worth confirming.

[George @ BMS]

Originally Posted by t-800

Had an issue with the sensor yes.
Replaced it with a brand new one (faff of a job)

I’m merely reporting what difference I see with 1) no JB4 connected 2) JB4 connected with just bottom sensor after emailing George. 3) connecting everything back up and straight away having the low boost issue.

Tried 8 then 7 first. Made zero difference on mine.

Out of interest is the new one identical part number or has it superseded to a newer number?

[cc61940542]

Sounds like only 3, 4 or 7, 8 worth trying

[Terry @ BMS]

Originally Posted by cc61940542

Sounds like only 3, 4 or 7, 8 worth trying

Seems like 4 has had the most "positive" feedback so far among the 2-3 guys posting here. I'll post another update shortly with some additional things to test based around setting 4.

A couple things I also need feedback on:

1) Are you guys also able to recreate the no boost condition in map8 VALET map which runs around 25% less boost than factory?
2) Most of you run additive maps, worth confirming if the issue comes up on absolute maps too. Using map6 you can make an "absolute target" map. For example setting map6 boost to the following profile.

[Terry @ BMS]

Added v8 firmware to the BETA channel and revised the test algorithms a bit.

FUA = 1 is the previous #4 test that had the best results reported, with a minor change.
FUA = 2 is the same as 1 but a little stronger effect. Both of these settings impact the manifold sensor only so if you're testing without the MAP sensor attached won't have any effect.

[cc61940542]

Use "absolute target" map，The same problem will occur, I have tested this very early

[cc61940542]

Is my circuit board the latest？

[Terry @ BMS]

Yes, see how v8 FUA = 1 does for you.

[cc61940542]

V8 FUA=1，a new problem appears, the boost displayed in the log is not real, it is lower than the actual value

[cc61940542]

I think new settings should impact the manifold sensor，eventually, the boost shown in jb4 log is lower than the real value，of course, this is just my guess

[leadfoot]

Well.. 5 is definitely crap. So, uploaded the new firmware and running on #1. Feels much more responsive off the line and around town. More later as I put some highway miles on. Btw, i can’t seem to see/find where the JB4 app shows which version of the firmware I’m running..?

[cc61940542]

You can try to log to see if boost is lower than your previous log

[Terry @ BMS]

Originally Posted by leadfoot

Well.. 5 is definitely crap. So, uploaded the new firmware and running on #1. Feels much more responsive off the line and around town. More later as I put some highway miles on. Btw, i can’t seem to see/find where the JB4 app shows which version of the firmware I’m running..?

Right in the user adjustment tab, see firmware update video in first post.

[Terry @ BMS]

Originally Posted by cc61940542

V8 FUA=1，a new problem appears, the boost displayed in the log is not real, it is lower than the actual value

Shouldn't be, let's see your log. Remember PSI is pre-throttle boost and PSI2 is manifold boost. ECU_PSI is boost sampled not from the sensors but from the ECU via CANbus and will match factory boost levels not JB4 tuned boost levels.

[leadfoot]

Yeah..I can see where it shows a firmware version something like 77/8//7.... But that version doesn't seem to change after updating the firmware..? Or maybe it just me... :-]

[Terry @ BMS]

77/is the RS3/TTRS platform, 8 is the firmware (v8), //7 is the board type (SENT)

[Terry @ BMS]

Originally Posted by t-800

Hmmm not getting error at start up.

JB4 says 8700?

I expect some of the test settings may trigger faults on some cars. If 2 isn't working try 3.

On 1 vs 0 is 1 any better?

[Terry @ BMS]

That looks like a FUA related fault. Should be no change between firmwares with FUA = 0, only change was to FUA algorithms. As mentioned faults are possible on FUA > 0 settings depending on the vehicle, barometric pressure, ECU version, etc.