[BarelyMovingWreck]

Hi all, just replaced my valve cover (cracked) yesterday and thought I'd do a pull and log to make sure everything is okay.

In the log (2nd-3rd-4th gear), I noticed the boost target is only really ever around 13psi, which is level the whole rpm range. Boost is hitting target no problem.

I also noticed a minor correction in second gear, but during the pull in fourth gear, all cylinders had some major corrections. WGDC looks good to me but those who know more can evaluate.

can anyone advise what could be the cause of this? I thought mhd stage 1 should be targeting around 15 - 16 PSI.

Plugs, coils, injectors have about 5k miles.

Thanks

https://datazap.me/u/apex6589/stg1-v...&data=3-16

[BarelyMovingWreck]

Just noticed target is a tad above actual boost. Weird, I also did a log last night (without timing unfortunately), and boost was right at target.

[Saif2018]

Originally Posted by BarelyMovingWreck

Hi all, just replaced my valve cover (cracked) yesterday and thought I'd do a pull and log to make sure everything is okay.

In the log (2nd-3rd-4th gear), I noticed the boost target is only really ever around 13psi, which is level the whole rpm range. Boost is hitting target no problem.

I also noticed a minor correction in second gear, but during the pull in fourth gear, all cylinders had some major corrections. WGDC looks good to me but those who know more can evaluate.

can anyone advise what could be the cause of this? I thought mhd stage 1 should be targeting around 15 - 16 PSI.

Plugs, coils, injectors have about 5k miles.

Thanks

https://datazap.me/u/apex6589/stg1-v...og=0&data=3-16

Standard 93 oct Stage 1 maps won't be targeting 15 or 16 psi, the E maps probably will.

You'll get about 13-14 psi based on the map version you run. So your targeting the correct psi and your boost levels are fine.

Your timing corrections could be related to your plugs and/coils. Before you go changing them, try running V7.1 or V9 maps and logging again.

V8 maps have been reported by several people to have issues.

[BarelyMovingWreck]

Here is another log with more info

https://datazap.me/u/apex6589/correct?log=0&data=3-19

[Saif2018]

Originally Posted by BarelyMovingWreck

Here is another log with more info

https://datazap.me/u/apex6589/same-l...og=0&data=3-19

Flash V7.1 or V9 map and do a 3rd gear log (rpms at 2500, M mode, DSC fully off, then go WOT until just after it shifts into 4th, then back off)

[BarelyMovingWreck]

Originally Posted by Saif2018

Flash V7.1 or V9 map and do a 3rd gear log (rpms at 2500, M mode, DSC fully off, then go WOT until just after it shifts into 4th, then back off)

Thanks, will do this later tonight. Those second logs had pretty serious corrections by the time I got to 4th. Plugs are NGK 1 step colder @ .022 and coils are bosch.

[BarelyMovingWreck]

Originally Posted by Saif2018

Flash V7.1 or V9 map and do a 3rd gear log (rpms at 2500, M mode, DSC fully off, then go WOT until just after it shifts into 4th, then back off)

My car is 6MT btw, not AT. Still go until after 3-4 shift?

[BarelyMovingWreck]

Originally Posted by Saif2018

Standard 93 oct Stage 1 maps won't be targeting 15 or 16 psi, the E maps probably will.

You'll get about 13-14 psi based on the map version you run. So your targeting the correct psi and your boost levels are fine.

Your timing corrections could be related to your plugs and/coils. Before you go changing them, try running V7.1 or V9 maps and logging again.

V8 maps have been reported by several people to have issues.

Also do you think that plugs / coils could cause corrections in all 6 cylinders like this? I had the wrong second log posted, correct one with huge corrections is https://datazap.me/u/apex6589/correct?log=0&data=3-19

[BarelyMovingWreck]

Another thing is I've heard of some forum members having bad timing corrections with winter blends of gas, even 93OCT, which is what I'm on now in CT I believe. I'll run V9.0 logs and if I still have it run V9.0 91OCT and see if they're any better.

[BarelyMovingWreck]

So I flashed 93oct V9.0 and did two logs as MHD asks (2500RPM in 3rd, pull until 3-4s in 4th), and everything looks good in third (with one cylinder timing hitting -3.3, kind of high? and then tapering and in the second log another matching it), but then as soon as I shift to 4th all cylinders experience heavy corrections, ranging from 0 all the way upto -6.3.

I also read that it takes a few days for the DME to adapt to the fuel, your car, etc with ots tunes like this, these logs were right after a flash / knock adaptation reset. Any ideas on the corrections after shifting?

Logs:

https://datazap.me/u/apex6589/mhd-st...-6-7-8-9-10-18

https://datazap.me/u/apex6589/mhd-st...-9-10-15-16-18

[Saif2018]

Originally Posted by BarelyMovingWreck

My car is 6MT btw, not AT. Still go until after 3-4 shift?

Yeah.

[Saif2018]

Originally Posted by BarelyMovingWreck

So I flashed 93oct V9.0 and did two logs as MHD asks (2500RPM in 3rd, pull until 3-4s in 4th), and everything looks good in third (with one cylinder timing hitting -3.3, kind of high? and then tapering and in the second log another matching it), but then as soon as I shift to 4th all cylinders experience heavy corrections, ranging from 0 all the way upto -6.3.

I also read that it takes a few days for the DME to adapt to the fuel, your car, etc with ots tunes like this, these logs were right after a flash / knock adaptation reset. Any ideas on the corrections after shifting?

Logs:

https://datazap.me/u/apex6589/mhd-st...-6-7-8-9-10-18

https://datazap.me/u/apex6589/mhd-st...-9-10-15-16-18

Those heavy corrections after shifting to 4th remaining for a long time are the issue, some corrections in 3rd upto about 3 is normal.

Yes DME does take a while to adapt,

I can see your IAT's rapidly climbing due to stock intercooler heatsoak , that would also contribute to timing corrections,

Timing corrections are normally a result of bad fuel, plugs, coils, Intercooler heatsoaking.

Would recommend changing coils and plugs, (use Eldor coils or failing that Delphi ones, OEM Bosch plugs should be fine) next step would be FMIC upgrade.

In the meantime you can try v7.1, which should have slightly less timing and boost.

[BarelyMovingWreck]

Originally Posted by Saif2018

Those heavy corrections after shifting to 4th remaining for a long time are the issue, some corrections in 3rd upto about 3 is normal.

Yes DME does take a while to adapt,

I can see your IAT's rapidly climbing due to stock intercooler heatsoak , that would also contribute to timing corrections,

Timing corrections are normally a result of bad fuel, plugs, coils, Intercooler heatsoaking.

Would recommend changing coils and plugs, (use Eldor coils or failing that Delphi ones, OEM Bosch plugs should be fine) next step would be FMIC upgrade.

In the meantime you can try v7.1, which should have slightly less timing and boost.

I'll probably switch to v7.1 for now, you don't think it has to do with the swap to Winter gas? I definitely do need an intercooler but my coils and plugs (and injectors, walnut blast) are only 5k miles old. Turbos and HPFP have about 14k.

[Saif2018]

Originally Posted by BarelyMovingWreck

I'll probably switch to v7.1 for now, you don't think it has to do with the swap to Winter gas? I definitely do need an intercooler but my coils and plugs (and injectors, walnut blast) are only 5k miles old. Turbos and HPFP have about 14k.

Yes it Could be poor fuel quality winter gas, or a combination of plugs and coils.

If you had a log in summer vs winter fuel that would help identify if this is the case.

OEM Bosch coils can be the culprits though, Delphi or Eldor Coils seem to run better when tuned.