[alltimesaresoon]

I would also take the turbo air intake connection off 1st and verify your turbo turbine is spinning freely, carefully with a screwdriver to turn it. My 1st worry was I seized the turbo. Most likely not but it's easy to check this 1st

 

[alltimesaresoon]

And you won't see any fluid leak for a boost leak. You gotta look for escaped air. And that looks like all the other air. But you can hear it escaping. A proper boost leak check device is a good learn how to use tool to have. Search for that on here

 

[alltimesaresoon]

2" Pro-Kit Boost Leak Tester

Turbo boost leak testers for all makes and models. Mitsubishi, Dodge, Audi, Nissan, ... for custom turbo kits, Garret, Borb Warner, ...

turboboostleaktesters.com

 

[banane8]

Thank you, this is reassuring and great info. Really happy you solved it! The picture was especially helpful in guiding me around as I'm very green.

Important The wheezing noise I was hearing was from the front right of the engine bay, ie. passenger side. It seemed to get a little louder over a number of drives but I confused it with transmission whine. Then all boost pressure was lost. The evidence points to a loose/broken hose as the most likely culprit? Or could the solenoid do something similar?

Checked the air filter - only a few months old and sparkling clean. I do suspect it's a leaking hose somewhere from the evidence.

I took some time to look for loose clamps or bad hoses before work this morning and while I can't pinpoint exactly what hoses do what, I tried my very best as I knew the wheezing sound (which I now believe to be air escaping) and have returned with questions and pictures

I didn't find a loose or detached hose afaik. Did not check everything.

Picture A Slight detour first; sponge on turbo has a gap but is clamped tightly further down so presumably doesnt matter. Just coming for confirmation of the presumably obvious. On the left you see my bonalume adjustable BO adapter.

Picture B Inside air filter box, the pipe has this "marking". Matches up with outside, so guessing it's OK but coming for confirmation.

Picture C Same pipe from the outside, the housing is completely loose. Is it just a housing to protect the pipe or is it supposed to be tight? Moves up and down and wiggles effortlessly.

Picture D Found this little guy which seems to look like it's torn open but I don't know what this hose does or if it's in a different system.

Zoomed out pic to locate the hose.

uni

Picture E And this ziptie looked... homemade?

 

[banane8]

2" Pro-Kit Boost Leak Tester

Turbo boost leak testers for all makes and models. Mitsubishi, Dodge, Audi, Nissan, ... for custom turbo kits, Garret, Borb Warner, ...

turboboostleaktesters.com

I don't have access to an air compressor, and I'm limited from not having a driveway. I live in apartment with underground parking. Can't put the car on jacks.

 

[alltimesaresoon]

First glance none of those look bad to me. Try looking at the pipe coming out of the passenger side intercooler. You may have to remove the lower shielding

 

[alltimesaresoon]

I don't have access to an air compressor, and I'm limited from not having a driveway. I live in apartment with underground parking. Can't put the car on jacks.

likely going to have to take it to a good shop then.

 

[banane8]

That's what I'm thinking. Alas, my impatience... I want the sweet summer child on the road ASAP.

You've been beyond extremely helpful and I can't say how much I appreciate you taking the time out for it. I'm gonna keep this thread updated with anything and everything I find to hopefully help people seeing this in the future as well.

 

[alltimesaresoon]

yeah for sure. i'm hoping to hear what you find out that it was. still got my money on a big boost leak. knowing you are stock, the most likely failure is that plastic set of connections on the passenger side of the intercooler. i'll get you a pic of what it looks like.

 

[alltimesaresoon]

EC Intercooler Upgrade---Install

Install starting today for EC Intercooler Upgrade! Interesting to see nose off the Fiat. With turbo/supercharger added to our ND Miata projects we have chased cooling issues, makes us VERY curious to see how Fiat works with the same space. Unlike 1 grille for ND, the Fiat has 2 grilles and...

www.124spider.org

In this thread you'll see a lot of pictures. woops wrong one

 

[alltimesaresoon]

How to Install EUROCOMPULSION Intercooler Kit

How To Install EUROCOMPULSION Intercooler Kit Overview: To learn more about the intercooler, check out these two threads: - Stock vs EC Intercooler: https://www.124spider.org/forum/10-engine-technical-discussion/20090-stock-vs-eurocompulsion-intercoolers.html - More info on the EC Intercooler...

www.124spider.org

 

[alltimesaresoon]

helps to see it out of the car to know what it looks like i think. see these two pictures before reviewing that thread. the second picture zooms in on a common leak area for the stock pipes, where those two bolts are....

 

[SteveP.]

Just comparing to your photo 'A' and the area you have circled in red.

Also, "bonalume blow off adapter" - have you tried putting the OEM part back in place? s

 

[alltimesaresoon]

Your hose from intake isn't leaking or isn't leaking much and u just suck in air there that's not giving you a p2262 and limp mode.

 

[banane8]

Everything seems tight and dandy on the passenger side intercooler connector your pointed out. Ofc I have no compressor to blow air through it so I can't guarantee it. I would expect a loose bolt or clamp. I gave the bolts a squeeze with the 12mm - they're very tight. Not sure what else to look out for around there.

@SteveP. Thanks a ton. I'm very focused on the passenger side as that's where I heard the very distinct wheezy noise.

 

[banane8]

 

[banane8]

Took off the bonalume and... that's not supposed to be there, is it?

 

[banane8]

There's a bit of slide in the solenoid connector, about 1 mm. Doesn't hop off.

 

[alltimesaresoon]

A lil oil normal

 

[banane8]

I've removed the bonalume blow off adapter and put it back to stock at the wastegate solenoid, tightening the bolts to a firm squeeze but not all the way. I now have a pending P0299 'Low Boost'. If I rev up to 3.5-4k rpms I do detect a notable "thoosh" that sounds like stock recirculation, and no such noise under 3-3.5k rpms.

My question now is, do I have an air leak at all or was the noise from the transmission after all... and is it just the wastegate solenoid that's shot? How do I know if the wastegate solenoid is functioning properly?

A part of the O ring on the bonalume was squashed.

Now, aside from being slow to get to the obvious step pointed out by @SteveP. of removing my only mod, I might've done someone else stupid. I cleared the P2262 to get out of limp mode (rest assured the car has not been driven and it was only to verify there really was no boost). I thought the code would come back if the issue persisted but it didn't. Does the P0266 fault mean the P2262 is fixed because low boost is at least some boost?

Bonalume O ring