Logging results - iam down and boost won't nudge above 15?

[dr20t]

Had a bit of a light lb moment on way to work this morning and wondering if someone could confirm

My initial learning view showed correction of -4.96 as above in the 5-10 g/s range

I think this is due to the motor being tuned for higher boost at that level. Thus, because I'm not able to boost over 14.5 (which seems more wg or ebc related now that I think of it), the motor is expecting more boost but when it doesn't see it is pulling fuel out and thus timing has been pulled and thats why Iam is down too

Hopefully once I fix boost issue all should be ok

Thoughts?

Mick

[<GB>]

Had a bit of a light lb moment on way to work this morning and wondering if someone could confirm

My initial learning view showed correction of -4.96 as above in the 5-10 g/s range

I think this is due to the motor being tuned for higher boost at that level. Thus, because I'm not able to boost over 14.5 (which seems more wg or ebc related now that I think of it), the motor is expecting more boost but when it doesn't see it is pulling fuel out and thus timing has been pulled and thats why Iam is down too

Hopefully once I fix boost issue all should be ok

Thoughts?

Mick

thats kinda what i was referring too in my post.. id be getting the boost issues looked at and see how it goes after that

[zorro]

What MAP sensor do these things run?

[dr20t]

Zorro don't know about type but they run a map and maf. Not like conventional afm though

Anyway update time

Boost issue is fixed. Turned out to be settings on ebc which must have been played with after the tune (not by me)

Good news is I'm now seeing 19psi. Bad news is iam is still down so gonna fix this tomorrow.

Ive now realized (from the sound of the wastegate opening) that car hasn't run like this since a few days after the tune

Power is massive compared to before. And it's obvious given it has been running 14.5psi off the spring since shortly after the tune.

Going back to Wsid tomorrow to see what she cracks with proper boost

Thanks for allthe suggestions amd assistance guys
Mick

[<GB>]

Zorro don't know about type but they run a map and maf. Not like conventional afm though

Anyway update time

Boost issue is fixed. Turned out to be settings on ebc which must have been played with after the tune (not by me)

Good news is I'm now seeing 19psi. Bad news is iam is still down so gonna fix this tomorrow.

Ive now realized (from the sound of the wastegate opening) that car hasn't run like this since a few days after the tune

Power is massive compared to before. And it's obvious given it has been running 14.5psi off the spring since shortly after the tune.

Going back to Wsid tomorrow to see what she cracks with proper boost

Thanks for allthe suggestions amd assistance guys
Mick

Did u clear the ecu so it can re learn itself?

[Rome_BRZ]

Damnit Mick I am at a concert tomorrow otherwise would have loved to tag along!

[dr20t]

Reset the ecu but iam is still down to 0.5 even after driving for a bit so hopefully after a couple more hundred kms it comes back up to 1.0.

Otherwise will be manually changing it using ecu flash

Rome I've actually thought about it and gonna go next Wednesday as I wanna fix the iam and alight oil look from my turbo feed line before I go.

Will update post once I know what happens with iam

Cheers
Mick

[Rome_BRZ]

Awesome well if it's next Wednesday I'm in. What time would you normally go?

[dr20t]

Try get there by six usually maybe bit later

[bass_straitener]

G'day Mick,

Got to ask the question? What was the reason for the last tune? Something changed?

Also do you have a copy of your last map?

From my understanding of tuning everything you do to increase power is eventually limited by cylinder pressure.

If your tuner has decreased boost could he not have increased timing? If so then increasing boost whilst maintaining the current timing could prove dangerous. I'm a little concerned

Could you check your previous map to the current one using the Romraider tool to compare 2 maps to see what else is changed.

Also any chance of a Learning View snapshot for a check.

[dr20t]

Hi Bruce

My last tune was due to turbo injector and fmic upgrade

To clarify - the tune is perfect

The only reason my iam has come down is due to the above

That is, my wastegate boost nipples had come loose so my ebc was doing nothing

Therefore when my car was tuned for 19psi, and them the wastegate was opening at 14.5, the ecu pulled fuel because the maf was not seeing the boost it was tuned for. So because of this, there must har been a lean out at some stage and thus ecu pulled timing via feedback knock, then some more via flkc and then iam as a final safety measure.

Thus all the issues seem to have been caused by the wg feeds coming loose and therefore ebc not having an effect.

Its my fault because my ebc is in my cubby and I always have this closed so don't monitor boost.

It was very obvious once I fixed the boost issue because te ebc stepper motor is very noticeable on am external gate (you can hear it quite clearly cutting in and out to regulate boost). It then clicked to me that I haven't heard this happen since a few days after my tune in January!!

So seems ive been running 14.5psi since then. So I'm sure you can appreciate my elation at finding "new power" again now that I'm boosting to 19psi again

Only thing still left to sort is iam which hopefully should return to 1.0 once the ecu learns that all is ok and therefore bumps back up

If this hasn't happened by next Tuesday I'll be manually adjusting it using ecuflash

Mick

[<GB>]

thats good, its funny how somthing so small can upset the ecu so much and you can see it in the data

[bass_straitener]

Sounds like your onto it Mick.

It is a bugger when a little hose popping off can really stuff up things. That's the first thing to check it would seem if you don't think you're car's running as it should.

Especially if you're running anything more than stock boost.

I know I've suffered the same scenario and then gone on a clips and clamps upgrade to ensure things stay on like they should.

I'd be looking at setting the IAM initial to 1.0, if not already setup that way, then reloading the map and this should get your IAM at 1.0 from the start instead of the Subaru standard of 0.5 and getting the ECU to raise it to on KCA.

All very interesting stuff.

[Rome_BRZ]

Hi Bruce

My last tune was due to turbo injector and fmic upgrade

To clarify - the tune is perfect

The only reason my iam has come down is due to the above

That is, my wastegate boost nipples had come loose so my ebc was doing nothing

Therefore when my car was tuned for 19psi, and them the wastegate was opening at 14.5, the ecu pulled fuel because the maf was not seeing the boost it was tuned for. So because of this, there must har been a lean out at some stage and thus ecu pulled timing via feedback knock, then some more via flkc and then iam as a final safety measure.

Thus all the issues seem to have been caused by the wg feeds coming loose and therefore ebc not having an effect.

Its my fault because my ebc is in my cubby and I always have this closed so don't monitor boost.

It was very obvious once I fixed the boost issue because te ebc stepper motor is very noticeable on am external gate (you can hear it quite clearly cutting in and out to regulate boost). It then clicked to me that I haven't heard this happen since a few days after my tune in January!!

So seems ive been running 14.5psi since then. So I'm sure you can appreciate my elation at finding "new power" again now that I'm boosting to 19psi again

Only thing still left to sort is iam which hopefully should return to 1.0 once the ecu learns that all is ok and therefore bumps back up

If this hasn't happened by next Tuesday I'll be manually adjusting it using ecuflash

Mick

Then onto the drags! Will be good to see what your car can manage down the quarter mile now that it seems to be running as it should. I'm also interested to see what my car will do now and after all my work is done

[dr20t]

Yep thanks guys

The vacuum hose to wastegate is held on by a thread and bolt which had worked it's way loose somehow from vibration

The lack of boost control prompted me to check all these

Iam initial was definitely set to 1.0 in the ecu hard ram, but as said above has pulled back

When you reset the ecu it also defaults to 0.5 until it learns it's way around it and reverts to 1.0

If this hasn't happened by early next week I'll manually change it

Mick