Full blown stage one turbo questions

[alphasaur]

Direct injectors removed anddddddddddddddddd

they look perfect.

fuck me.

[alphasaur]

So replaced injectors, started up without the driver side injector cover. PRETTY sure I can isolate the noise to the DI pump using my stethoscope.

When revving noise appears to disappear?

Going to take it for a short drive tomorrow/friday and see how it is

edit:

Sounds EXACTLY like this, with a VERY similar cadence

https://www.skyroadster.com/threads/...jectors.97189/

also no codes

[Ultramaroon]

Originally Posted by alphasaur

So replaced injectors, started up without the driver side injector cover. PRETTY sure I can isolate the noise to the DI pump using my stethoscope.

When revving noise appears to disappear?

Going to take it for a short drive tomorrow/friday and see how it is

edit:

Sounds EXACTLY like this, with a VERY similar cadence

https://www.skyroadster.com/threads/...jectors.97189/

also no codes

It absolutely does, but I've never heard another fa20 make that noise. If it's the SCV, then I think something is off, like it's sticking. Crickets are the sound of DI rail pressure being properly regulated.

[alphasaur]

Originally Posted by Ultramaroon

It absolutely does, but I've never heard another fa20 make that noise. If it's the SCV, then I think something is off, like it's sticking. Crickets are the sound of DI rail pressure being properly regulated.

Think I can just replace the hpfp if so? Maybe bad gas? Has been sitting for close to a month

[Ultramaroon]

Originally Posted by alphasaur

Think I can just replace the hpfp if so? Maybe bad gas? Has been sitting for close to a month

Meh. A month is nothing. If you can log, I wouldn't throw parts at it just yet. Log the DI rail pressure while it's idling. I wonder if the SCV current, or duty cycle can also be logged.


Or maybe it's no biggie.


edit: https://gt86stuff.onrender.com/t3Por...00PG7039X.html

[alphasaur]

Originally Posted by Ultramaroon

Meh. A month is nothing. If you can log, I wouldn't throw parts at it just yet. Log the DI rail pressure while it's idling. I wonder if the SCV current, or duty cycle can also be logged.


Or maybe it's no biggie.


edit: https://gt86stuff.onrender.com/t3Por...00PG7039X.html

https://docs.google.com/spreadsheets...Bak0Mc/pubhtml

log

Link super helpful, thank you!

[Ultramaroon]

Originally Posted by alphasaur

https://docs.google.com/spreadsheets...Bak0Mc/pubhtml

log

Link super helpful, thank you!

Nope. Surprised this isn't throwing some sort of code. 10 secs of yours vs ten of mine. For me, fuel sys modes 2 and 4 are closed loop and fuel cut respectively.

edit: I mean "fuel system status" codes. I don't know how it would be possible for yours to be in fuel-cut mode so I'm not really sure what any of it, including my own, means.

[alphasaur]

Originally Posted by Ultramaroon

Nope. Surprised this isn't throwing some sort of code. 10 secs of yours vs ten of mine. For me, fuel sys modes 2 and 4 are closed loop and fuel cut respectively.

edit: I mean "fuel system status" codes. I don't know how it would be possible for yours to be in fuel-cut mode so I'm not really sure what any of it, including my own, means.

well definitely looks drastically different than yours

I drove today and it seems mostly okay? No codes. Didn't get super into it since it's base tune. Clicking seems to have decreased drastically so not sure what it was but it definitely still seems present, just not nearly as loud. I did order a new HPFP off of ebay from a 19' with 15k miles.

Sent logs to tuner so we will see what he says.


Also have a super slow leak from the area in green unfortunately. Tried tightening but no luck. Going to try an Earl's 10an seal and some permatex high temp thread sealant IDK

this oil drain location is honestly not my favorite due to proximity to header and belts (it is not touching manifold, it's the angle of the photo. It is close at it's closest though at probably 1/4-1/2 of an inch)

[Ultramaroon]

It's clearly having trouble regulating rail pressure. If you enable the PI ratio graph you can see that your keeps trying to kick in but flops. That might even be the sound we hear.

[alphasaur]

Originally Posted by Ultramaroon

It's clearly having trouble regulating rail pressure. If you enable the PI ratio graph you can see that your keeps trying to kick in but flops. That might even be the sound we hear.

in your picture it matches the cadence of the sound (about 1 click every 10 seconds) so maybe

IDK

Not sure what I could have fucked up

@AussieBRZ, any thoughts?
@tomm.brz you seem smart too IDK if you can help lolol

[tomm.brz]

i m not following quite good this thread
what kind of injectors are installed and what is the settings of them in the tune?

[Ultramaroon]

Originally Posted by alphasaur

Started up today successfully!
I do have this odd noise that I don't remember having before?

https://www.youtube.com/shorts/hlNV1sVt-_I

you hear it once the camera gets lowered. It's louder/more noticeable in person. It sounds like it's near driver side injector area/head

Am I crazy?
@DarkPira7e @Ultramaroon

Haven't driven yet waiting for a part for my bumper

Originally Posted by tomm.brz

i m not following quite good this thread
what kind of injectors are installed and what is the settings of them in the tune?

Hi, Tomm. Maybe less confusing if you only start reading at the post I quoted. Strange ticking sound. A few in more rapid succession but mostly about one tick per second.

[alphasaur]

Originally Posted by tomm.brz

i m not following quite good this thread
what kind of injectors are installed and what is the settings of them in the tune?

Hi yes thank you!

See youtube video for clicking

Then see that fuel system status fluctuates between 2 and 4 and di fuel pressure seems to be very inconsistent

OEM injectors, di injectors recently cleaned. 3 bar omni map. K00c tune.

[AussieBRZ]

Originally Posted by alphasaur

in your picture it matches the cadence of the sound (about 1 click every 10 seconds) so maybe

IDK

Not sure what I could have fucked up

@AussieBRZ, any thoughts?
@tomm.brz you seem smart too IDK if you can help lolol

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