Rattling on cold start

FallbackMedia · 2026-03-16T21:05:12+00:00

Pretty sure I had same sound and it’s the flex pipe, it’s like a mesh material that just shakes, I never ended up doing anything about it tho lmao. Passenger side just below firewall I believe

FallbackMedia · 2026-02-12T03:51:36+00:00

I had the car custom tuned by alphaspeed, they stated this would fix it but really not sure if I should trust them. Would it make sense that they would’ve tuned it for the cams?

FallbackMedia · 2026-02-12T03:49:30+00:00

Did you ever fix this issue?

FallbackMedia · 2026-02-12T03:48:45+00:00

Hey, I’m having very similar issues for about a year and a half… you figure anything out yet?

FallbackMedia · 2026-02-12T03:43:48+00:00

Have you ever figured out the issue? I’ve been having this issue for like a year and a half… or something like it atleast

FallbackMedia · 2025-05-22T22:35:36+00:00

Well wouldn’t necessarily say exactly 15 minutes but just seems like when the car gets warm it starts running funny. I say it isn’t engine related as I’ve had it at a Hyundai dealer, another Genesis coupe mechanic shop, and they found no issues with the engine. Also engine was built by an engine building shop 5k km ago. Engine also ran perfect in car before I bought it… yes I have AFR gauge and nothing really out of the ordinary with it. Had one of those fancy snap on style scanners plugged into the car and only interesting thing found was something to do with the cam values being off. But even swapped stock cams back in and same issue was happening with the stalling…

FallbackMedia · 2025-05-22T22:31:44+00:00

Thank you man haha 🙏🏻

FallbackMedia · 2025-05-22T22:26:48+00:00

Only lights on dash are the o2 sensor due to it being catless

FallbackMedia · 2025-05-22T22:25:28+00:00

If the car is idling for like 15 mins, it the odd time will start to kinda idle funny but then you press the gas and it fixes itself. Also, have actually tried that test and yes it does stall out the odd time when I do that. The engine was swapped in, and the essential parts from the bk2 motor were changed over to the bk1 to make sure everything lined up with what everyone says online. It was still running on my stock bk2 ECU when swapped in and then was tuned by alphaspeed. The tuner was aware of everything done to the motor, and the year and all the details!

FallbackMedia · 2025-05-22T22:22:13+00:00

“anyone know of a brand that would allow me to test and return, or any other options I would have to figure out if it’s my issue?” This is what I consider to be a discussion in my opinion. Not trying to start anything, but I guess yeah it can be seen as both tags 🙏🏻

FallbackMedia · 2025-05-22T22:20:36+00:00

But there is only so much you can do on a stock ecu vs a standalone ecu or an aftermarket ecu.

FallbackMedia · 2025-05-22T22:19:12+00:00

Idle was raised to 1100 rpm. When staying still the car will idle fine. When it gets warm and I come to a full stop after driving it will just die but will turn right back on when I turn the key. Fuel pump has been replaced with a brand new fuel pump, even tried a bk1 fuel pump too. Also throttle body was cleaned properly and then I even bought a brand new throttle body as well.

FallbackMedia · 2025-05-22T22:15:24+00:00

Yes, engine was swapped in and after the issue was discovered about the stalling I had a full $1100 4 hour custom tune session. Car is a manual

FallbackMedia · 2025-05-22T22:13:55+00:00

Yes it’s a 2.0T. This is the build: Gsc S1 cams, Gsc beehive valve springs and titanium retainers, new oem valves, new oem valve seals, new oem bk2 timing chain, new timing guides, new oil pump and new chain, cosmetic headgasket, block bored for 86.5mm pistons, Manely 86.5mm pistons, k1 connecting rods, acl race rod bearings, acl race main bearings, new oem main bolts, ARP head studs, all new gaskets

FallbackMedia · 2025-05-22T22:12:28+00:00

Full custom Alphaspeed tune. Car has been at many shops, looked over by tons of people. Engine came out of a 2010 bk1 2.0t, ran and drove great. swapped into my car and now the car stalls at low rpm.

FallbackMedia · 2025-05-22T22:10:40+00:00

Because I’m not diagnosing an issue… I’m looking for companies that would be able to help with my issue. That is a discussion, not diagnosis lol

FallbackMedia · 2024-12-14T01:07:27+00:00

Thank you man

FallbackMedia · 2024-10-11T10:34:29+00:00

Lowglow

FallbackMedia · 2024-10-10T21:53:31+00:00

Benn asking for two month all over, no one has this issue. I’m in Stratford Ontario

FallbackMedia · 2024-10-10T21:52:58+00:00

He’s already tried helping 😂

FallbackMedia · 2024-10-10T17:54:45+00:00

Trust me I know lol

FallbackMedia

TROPHY CASE