Bank 1 & 2 system too lean

ZachU · 07-11-2021, 03:35 PM

Hey guys. I installed the Procharger P1X about two weeks ago and everything has been fine on their remote tune. I installed the MM wild catch can yesterday and woke up today with CEL for lean system on bank 1 & 2. Any ideas?

Joshinator99 · 07-11-2021, 03:43 PM

Sounds like a vacuum leak or improper placement of your catch can hoses...

ZachU · 07-11-2021, 04:09 PM

Quote:

Originally Posted by Joshinator99

Sounds like a vacuum leak or improper placement of your catch can hoses...

Weird.....I attached the clean side of the can to the procharger manifold going into the intake manifold and the 8AN fitting to the oil filler cap attachment just as the instructions said. Other than capping off the valley that was all that was done. Ran fine for two weeks before the can install so I suspect you are right.

ZachU · 07-11-2021, 05:27 PM

I just checked everything and the car seems to be running just fine no rough or high idle. Attempted to clear the code after tightening all hose clamps and such and it still persists. The scanner shows my IAT in red and at 129 when I hook it up to HPtuners scanner. I did notice the hose on the intake port had slid back a bit so I moved it up and tightened the clamp down again....still have CEL.

ZachU · 07-11-2021, 05:54 PM

I put the scanner on it again and got the CEL to clear but bank 2 still looks about 4.7 higher thank Bank 1 at idle and seems to stay higher in all rpm ranges....

ZO6Ted · 07-12-2021, 10:17 AM

Happened to my Whipple after 20k. It was a leaking actuator diaphragm below the TB.

ZachU · 07-12-2021, 11:01 AM

Quote:

Originally Posted by ZO6Ted

Happened to my Whipple after 20k. It was a leaking actuator diaphragm below the TB.

Interesting....I got the code to clear last night and re routed my Catch can hoses so they aren't under the TB or touching anything but the intake tube and can get a bit more airflow. I noticed my IAT jumping into the red at WOT and took Joshinator's advice about improper placement of the hoses. Going to take it to my friend today to have him look at it since bank 2 is consistently higher than bank 1. Right now I'm thinking I may have to order some LT4 injectors and high pressure pump which is something I was going to do anyway just not as soon.

ZO6Ted · 07-12-2021, 07:47 PM

Gosh, got to thinking I don't even know if a PC has an actuator bypass but Joshinator's comment about vacuum leak I just threw it out there because it probably is a vac leak.

Joshinator99 · 07-12-2021, 09:32 PM

I wonder if a check valve in the CC is stuck or not working. Hopefully the hoses were connected up right...? That would do it for sure.

ZachU · 07-12-2021, 11:29 PM

After re-routing the hoses last night and driving it to my friend's shop everything is good. My friend looked at the tune and data log I had saved and thought everything looked fine. My IAT is lower today after relocating the smaller hose leading up to the intake manifold. I appreciate the brainstorming here gentlemen! It was likely a vacuum leak that I must have fixed yesterday.

Joshinator99 · 07-13-2021, 08:19 AM

Quote:

Originally Posted by ZachU

After re-routing the hoses last night and driving it to my friend's shop everything is good. My friend looked at the tune and data log I had saved and thought everything looked fine. My IAT is lower today after relocating the smaller hose leading up to the intake manifold. I appreciate the brainstorming here gentlemen! It was likely a vacuum leak that I must have fixed yesterday.

07-11-2021, 03:35 PM	#1
ZachU Drives: 2017 Camaro SS Join Date: Feb 2014 Location: Fort Worth Texas Posts: 96 View My Garage	Bank 1 & 2 system too lean Hey guys. I installed the Procharger P1X about two weeks ago and everything has been fine on their remote tune. I installed the MM wild catch can yesterday and woke up today with CEL for lean system on bank 1 & 2. Any ideas? __________________ 2017 Camaro 1SS Procharger P1X Stage 2 intercooler

07-11-2021, 03:43 PM	#2
Joshinator99 Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 4,749	Sounds like a vacuum leak or improper placement of your catch can hoses... __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion *1059 WHP/944 WTQ, 9.48@150*

07-11-2021, 05:27 PM	#4
ZachU Drives: 2017 Camaro SS Join Date: Feb 2014 Location: Fort Worth Texas Posts: 96 View My Garage	I just checked everything and the car seems to be running just fine no rough or high idle. Attempted to clear the code after tightening all hose clamps and such and it still persists. The scanner shows my IAT in red and at 129 when I hook it up to HPtuners scanner. I did notice the hose on the intake port had slid back a bit so I moved it up and tightened the clamp down again....still have CEL. __________________ 2017 Camaro 1SS Procharger P1X Stage 2 intercooler

07-11-2021, 05:54 PM	#5
ZachU Drives: 2017 Camaro SS Join Date: Feb 2014 Location: Fort Worth Texas Posts: 96 View My Garage	I put the scanner on it again and got the CEL to clear but bank 2 still looks about 4.7 higher thank Bank 1 at idle and seems to stay higher in all rpm ranges.... __________________ 2017 Camaro 1SS Procharger P1X Stage 2 intercooler

07-12-2021, 09:32 PM	#9
Joshinator99 Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 4,749	I wonder if a check valve in the CC is stuck or not working. Hopefully the hoses were connected up right...? That would do it for sure. __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion *1059 WHP/944 WTQ, 9.48@150*

07-12-2021, 10:17 AM	#6
ZO6Ted Old badass Drives: 14GMC 2.9 16GMC Turbos 2020Silv.6.2 Join Date: Mar 2020 Location: Arlington Tx Posts: 238	Happened to my Whipple after 20k. It was a leaking actuator diaphragm below the TB.

07-12-2021, 07:47 PM	#8
ZO6Ted Old badass Drives: 14GMC 2.9 16GMC Turbos 2020Silv.6.2 Join Date: Mar 2020 Location: Arlington Tx Posts: 238	Gosh, got to thinking I don't even know if a PC has an actuator bypass but Joshinator's comment about vacuum leak I just threw it out there because it probably is a vac leak.

07-12-2021, 11:29 PM	#10
ZachU Drives: 2017 Camaro SS Join Date: Feb 2014 Location: Fort Worth Texas Posts: 96 View My Garage	After re-routing the hoses last night and driving it to my friend's shop everything is good. My friend looked at the tune and data log I had saved and thought everything looked fine. My IAT is lower today after relocating the smaller hose leading up to the intake manifold. I appreciate the brainstorming here gentlemen! It was likely a vacuum leak that I must have fixed yesterday. __________________ 2017 Camaro 1SS Procharger P1X Stage 2 intercooler

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