Full blown stage one turbo questions

[alphasaur]

Originally Posted by AussieBRZ

Yes seems strange usually di fuel pressure failry steady 3 to 4 MPa at idle


Check the grounds on the DI computer under Bonnett all three bolts in and tight


Also it might be the di fuel pressure sensor feeding the di computer weird info then the di pump tries to follow that.


My guess would be di pump or di pressure sensor if the di computer is correctly earthed/grounded unless there is something very weird in tune

going to look into this, thank you!

Super appreciate you!

[alphasaur]

Originally Posted by AussieBRZ

Yes seems strange usually di fuel pressure failry steady 3 to 4 MPa at idle


Check the grounds on the DI computer under Bonnett all three bolts in and tight


Also it might be the di fuel pressure sensor feeding the di computer weird info then the di pump tries to follow that.


My guess would be di pump or di pressure sensor if the di computer is correctly earthed/grounded unless there is something very weird in tune

the bottom bolt on the injector ecu was loose! But it didn't fix the problem

Going to replace the hpfp and see if that fixes it. If not I'll pull the IM again and swap the sensor.

Tuner seems dismissive of the issue and I feel like my fuel trims are high and afr seems inconsistent at idle and cruising IDK

[AussieBRZ]

Originally Posted by alphasaur

the bottom bolt on the injector ecu was loose! But it didn't fix the problem

Going to replace the hpfp and see if that fixes it. If not I'll pull the IM again and swap the sensor.

Tuner seems dismissive of the issue and I feel like my fuel trims are high and afr seems inconsistent at idle and cruising IDK

Check the bracket bolts on di computer as well see photo

[alphasaur]

Originally Posted by AussieBRZ

Check the bracket bolts on di computer as well see photo

remounted the injector computer and checked those bolts, super snug.

Start car up and fuel status stays in mode 2, once it drops to idle it does the fluctuating between 2 and 4 and the ticking starts

Is it possible I boinked a wire when I moved the injector computer to remove manifold?

When I go to check ready states fuel sytem is unready which I find odd so I don't think it will throw a code?

Could it be my e85 flex fuel kit still being installed?

[tomm.brz]

which map sensor?
. if you have a 4bar map... change it.

[Ultramaroon]

Not sure where this is going so I'll just throw this out there.

It runs well enough to go closed-loop mode while idling. The trouble starts when it tries to switch over to DI. That is something the ECU does to minimize emissions while idling. It goes into a lean-running mode with only the DI enabled.

I wonder if it can't switch to DI simply because the DI rail pressure is not being regulated. That sawtooth pattern seems to me like it's hunting because of inability to control. Since pressure reading is there and seems reasonable, I'd go back to suspecting the spill control valve, or the actuation signal.

Again... I've no firsthand experience with this. I'm just thinking out loud about how I would approach the issue.

[alphasaur]

Originally Posted by tomm.brz

which map sensor?
. if you have a 4bar map... change it.

3 bar omni sensor

Originally Posted by Ultramaroon

Not sure where this is going so I'll just throw this out there.

It runs well enough to go closed-loop mode while idling. The trouble starts when it tries to switch over to DI. That is something the ECU does to minimize emissions while idling. It goes into a lean-running mode with only the DI enabled.

I wonder if it can't switch to DI simply because the DI rail pressure is not being regulated. That sawtooth pattern seems to me like it's hunting because of inability to control. Since pressure reading is there and seems reasonable, I'd go back to suspecting the spill control valve, or the actuation signal.

Again... I've no firsthand experience with this. I'm just thinking out loud about how I would approach the issue.

I get new pump in next week I think, so can try that.

What is odd is that when driving around it seems to hit requested values, it just seems to be all over the place idling.

[alphasaur]

So someone VERY nice sent me a base map and the issue is resolved. At idle there is no more clicking, fuel pressure seems to hover around ~4 and fuel system status is steady at 2.

I am pretty irritated with my tuner, they totally just ignored my concerns.

I spent $500 on a HPFP and pressure sensor along with new gaskets in case I had a leak.

What should I do?

Not sure I want them touching the tune on my car anymore. Can't imagine the conversation of "hey your tune you said was fine was messing up my car and a free tune from a nice man fixed my issue" is going to go over well.

Honestly would like a partial/full refund and to go somewhere else

any guidance?

[DarkPira7e]

Originally Posted by alphasaur

So someone VERY nice sent me a base map and the issue is resolved. At idle there is no more clicking, fuel pressure seems to hover around ~4 and fuel system status is steady at 2.

I am super irritated with my tuner.

They totally just ignored my concerns.

I spent $500 on a HPFP and pressure sensor along with new gaskets in case I had a leak.

What should I do?

Not sure I want them touching the tune on my car anymore. Can't imagine the conversation of "hey your tune you said was fine was messing up my car and a free tune from a nice man fixed my issue" is going to go over well.

Honestly would like a partial/full refund and to go somewhere else

any guidance?

The tuner is going to keep making these mistakes if nobody tells them! Best to approach it neutrally and respectfully ask if there's a way to recoup some of the costs because of their negligence.


Super awesome that it was tune related! I wonder what parameters were at fault...

[alphasaur]

Originally Posted by DarkPira7e

The tuner is going to keep making these mistakes if nobody tells them! Best to approach it neutrally and respectfully ask if there's a way to recoup some of the costs because of their negligence.


Super awesome that it was tune related! I wonder what parameters were at fault...

I will try to find out what parameters were at fault. The tune from tuner 1 (who I paid) is locked.

I just emailed them letting them know the issue appears to be resolved with a basemap from someone else. Will update as I get more info.

[DarkPira7e]

I know it sounds crazy, but were it me, I'd try reflashing the old map just to see if the issue returns and that it wasn't some bug with that individual flash instance. I've seen stranger things. Worst that happens is the issue is back and you flash the base map back on, just will cost you 5-10 minutes. Up to you though

[alphasaur]

Originally Posted by DarkPira7e

I know it sounds crazy, but were it me, I'd try reflashing the old map just to see if the issue returns and that it wasn't some bug with that individual flash instance. I've seen stranger things. Worst that happens is the issue is back and you flash the base map back on, just will cost you 5-10 minutes. Up to you though

ooo will try it to rule that out.

I had a super pleasant experience with them with my flextune sadly this experience isn't going as well.

[tomm.brz]

very probable the bug will return
probably just a racerom bug, they are very present specially in US tunes


go to tuner number 2 : )