2015 Subaru brz Sprintex 335 supercharger. - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Loganp98 · 08-11-2025, 12:24 PM

Hey guys needing some help. My car broke down a couple months ago during a small pull on the interstate around 50mph. It started accelerating, heard a loud pop then car died and supercharger became super loud. Since then the car won’t idle, I can barely keep it alive reving it up. I’ve taken everything apart and resealed the supercharger and intake manifold. Smoke tested it and didn’t find any major leaks. Couple smalls ones from some clamps. The supercharger turns freely by hand and the screws looked fine while turning them. No fuel leaks anywhere either. It’s tuned by delicious with their off the shelf tune for the sprintex supercharger with e85. Only codes I’m getting is a random/multiple cylinder misfire which is very obvious. Thanks for any help.
Please don’t bring any hate in here. It was my choice to get a supercharger. When it was running i absolutely loved it. I just want it back lol.
This is what the car is doing now. https://imgur.com/a/WXHa604
This is the car when the belt is removed. https://imgur.com/a/Id5iloz
This is the car a couple months ago when it was running normally for comparison. https://imgur.com/a/yHqoNSt

sly · 08-11-2025, 08:50 PM

Where is the smoke coming from on the second video? It's at the end and looks like it's at the header. Have you checked compression on all 4 cylinders? Wondering if you broke a connecting rod. Is there any glitter in the engine oil? No hate about the supercharger. I love mine too.

Loganp98 · 08-12-2025, 02:19 PM

I hope I didn’t break a connecting rod. I’ve got forged internals in the engine along with stronger rods. The smoke is coming from the headers. The car has been sitting for a long time so it’s got rain and other stuff on it.

Muskoka800 · 08-16-2025, 10:39 AM

Have you checked the plugs?
I had the electrode break off the NGK in the #2 cylinder. Major misfire resulted.
Tried to limp it home a couple miles and destroyed the cat in the JDL front pipe (using a cat-less header).
All good once the plug was replaced and the cat was gutted.

Loganp98 · 09-03-2025, 10:19 PM

Sorry for the late response? Plugs were intact. Was covered in soot. I installed 4 new plugs and have no change to my situation.

08-11-2025, 12:24 PM	#1
Loganp98 Member Join Date: Feb 2020 Drives: White Subaru brz Location: North Carolina Posts: 25 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	2015 Subaru brz Sprintex 335 supercharger. Hey guys needing some help. My car broke down a couple months ago during a small pull on the interstate around 50mph. It started accelerating, heard a loud pop then car died and supercharger became super loud. Since then the car won’t idle, I can barely keep it alive reving it up. I’ve taken everything apart and resealed the supercharger and intake manifold. Smoke tested it and didn’t find any major leaks. Couple smalls ones from some clamps. The supercharger turns freely by hand and the screws looked fine while turning them. No fuel leaks anywhere either. It’s tuned by delicious with their off the shelf tune for the sprintex supercharger with e85. Only codes I’m getting is a random/multiple cylinder misfire which is very obvious. Thanks for any help. Please don’t bring any hate in here. It was my choice to get a supercharger. When it was running i absolutely loved it. I just want it back lol. This is what the car is doing now. https://imgur.com/a/WXHa604 This is the car when the belt is removed. https://imgur.com/a/Id5iloz This is the car a couple months ago when it was running normally for comparison. https://imgur.com/a/yHqoNSt

08-16-2025, 10:39 AM	#4
Muskoka800 Senior Member Join Date: Jul 2018 Drives: 2016 Scion FRS Release Series 2#439 Location: Chatham, Ontario, Canada Posts: 778 Thanks: 4 Thanked 169 Times in 139 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Have you checked the plugs? I had the electrode break off the NGK in the #2 cylinder. Major misfire resulted. Tried to limp it home a couple miles and destroyed the cat in the JDL front pipe (using a cat-less header). All good once the plug was replaced and the cat was gutted. __________________ Edelbrock S/C with CSG 94 & 91 maps TRD Short Shifter, CTS-V/EvoX Brembos Ohlin’s R&T Dampers, Hotchkis F/R Bars, Blox LCA & Toe Arms 235F/245R Conti ECS on TRD/Enkei wheels (street), 245/40 sq. ECF on 17x8 720Form GTF2 wheels (track)

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08-11-2025, 08:50 PM	#2
sly Senior Member Join Date: Dec 2015 Drives: 2016 Cosworth 2.2 BRZ Location: TN Posts: 335 Thanks: 88 Thanked 198 Times in 124 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Where is the smoke coming from on the second video? It's at the end and looks like it's at the header. Have you checked compression on all 4 cylinders? Wondering if you broke a connecting rod. Is there any glitter in the engine oil? No hate about the supercharger. I love mine too.

08-12-2025, 02:19 PM	#3
Loganp98 Member Join Date: Feb 2020 Drives: White Subaru brz Location: North Carolina Posts: 25 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I hope I didn’t break a connecting rod. I’ve got forged internals in the engine along with stronger rods. The smoke is coming from the headers. The car has been sitting for a long time so it’s got rain and other stuff on it.

09-03-2025, 10:19 PM	#5
Loganp98 Member Join Date: Feb 2020 Drives: White Subaru brz Location: North Carolina Posts: 25 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Sorry for the late response? Plugs were intact. Was covered in soot. I installed 4 new plugs and have no change to my situation.

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