Check Engine

Ruby13 · 05-22-2022, 09:13 PM

LT2 intake manifold and rotofab intake installed and of course p0106 engine code…. Can’t seem to figure it out, clips seemed to set fine for connections from GPI with map harness and shaved manifold. I did trim some of the foam pad… did I not trim enough? Connector bad? What could it be… I turned the car off and then back and it I heard a psssst noise like a nitrous purge valve real quick when I turned it back on quick after shut off… any help? Torqued to 89in/lbs in 3 parts 45/75/89

Trochoidal · 05-22-2022, 10:17 PM

I’d double check your work focusing on a vacuum leak. Maybe it’s the line in the back of the manifold.

It could very well be the foam pad isn’t letting the intake manifold contact the heads properly.

IMO I’d get rid of the pad and use something like this in its place.

https://www.summitracing.com/parts/hsp-140025

Ruby13 · 05-22-2022, 10:32 PM

How will I know if the line in the back? It’s just a tube into GPI’s metal fitting. Once pushed in it clicks and stays in.

Trochoidal · 05-22-2022, 11:02 PM

There are a few ways to check that fitting. One, listen for a vacuum leak. Two, use a smoke machine to see if smoke leaks out. Three, the old school way by spraying some carb cleaner at the fitting. While I’ve sprayed for vacuum leaks in the past, spraying in this location is close to exhaust. So that might not be a good idea.

GPI used a compression fitting on the back of these LT2 intakes. If you pushed it in good, it should have sealed. Did you by any chance cut that vacuum line because it was too long? Also did you pull on that line to make sure it did not want to release?

I recall a member here did a YT video on his install and that foam caused him issues.

https://m.youtube.com/watch?v=_DQdZ9rfQ68

When I bought my manifold from GPI there was no mention of whether to use the foam or not. I believe it’s personal preference.

Ruby13 · 05-23-2022, 08:08 AM

Didn’t cut any lines just pushed it into the fitting. Maybe I’ll pop it off and remove the foam and see what happens.

05-22-2022, 09:13 PM	#1
Ruby13 Drives: 2019 2SS/1LE Shadow Grey Join Date: Nov 2015 Location: DE Posts: 156	Check Engine LT2 intake manifold and rotofab intake installed and of course p0106 engine code…. Can’t seem to figure it out, clips seemed to set fine for connections from GPI with map harness and shaved manifold. I did trim some of the foam pad… did I not trim enough? Connector bad? What could it be… I turned the car off and then back and it I heard a psssst noise like a nitrous purge valve real quick when I turned it back on quick after shut off… any help? Torqued to 89in/lbs in 3 parts 45/75/89 Last edited by Ruby13; 05-22-2022 at 09:22 PM. Reason: More info

05-22-2022, 10:17 PM	#2
Trochoidal Drives: 2017 Camaro 2SS A8 Join Date: May 2019 Location: USA Posts: 1,656	I’d double check your work focusing on a vacuum leak. Maybe it’s the line in the back of the manifold. It could very well be the foam pad isn’t letting the intake manifold contact the heads properly. IMO I’d get rid of the pad and use something like this in its place. https://www.summitracing.com/parts/hsp-140025 __________________ Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“

05-22-2022, 11:02 PM	#4
Trochoidal Drives: 2017 Camaro 2SS A8 Join Date: May 2019 Location: USA Posts: 1,656	There are a few ways to check that fitting. One, listen for a vacuum leak. Two, use a smoke machine to see if smoke leaks out. Three, the old school way by spraying some carb cleaner at the fitting. While I’ve sprayed for vacuum leaks in the past, spraying in this location is close to exhaust. So that might not be a good idea. GPI used a compression fitting on the back of these LT2 intakes. If you pushed it in good, it should have sealed. Did you by any chance cut that vacuum line because it was too long? Also did you pull on that line to make sure it did not want to release? I recall a member here did a YT video on his install and that foam caused him issues. https://m.youtube.com/watch?v=_DQdZ9rfQ68 When I bought my manifold from GPI there was no mention of whether to use the foam or not. I believe it’s personal preference. __________________ Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“

05-22-2022, 10:32 PM	#3
Ruby13 Drives: 2019 2SS/1LE Shadow Grey Join Date: Nov 2015 Location: DE Posts: 156	How will I know if the line in the back? It’s just a tube into GPI’s metal fitting. Once pushed in it clicks and stays in.

05-23-2022, 08:08 AM	#5
Ruby13 Drives: 2019 2SS/1LE Shadow Grey Join Date: Nov 2015 Location: DE Posts: 156	Didn’t cut any lines just pushed it into the fitting. Maybe I’ll pop it off and remove the foam and see what happens.

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