CEL and fan at high speed after CAI and oil CC install

dhoogerhyde · 01-12-2026, 09:58 PM

I just installed a Rotofab CAI and an Elite E2 3 port oil CC. I used the Elite supplied GM style quick connects for the PCV connection and vacuum connection on the throttle body. The lower PCV connection is to the center inlet side of the CC. I have a plug in the intake tube where the sound tube would be with threaded hole and a 90 degree elbow threaded in for the 3rd port in the CC. Both check valves on the outlet side of the CC are pointed away from the CC. I did forget to disconnect the battery when unplugging the MAF to install the CAI.The CAI install was without issue following all of the rest of the instructions provided by Rotofab. I don’t have the codes yet which I will pull tomorrow with my scanner. Vacuum leak? Damaged my MAF? Incorrectly routed CC lines? Any thoughts appreciated.

2SS Capt · 01-12-2026, 11:43 PM

Total guess, but I would imagine the CC lines may be routed wrong, the CAI should have zero effect on anything in this situation...

KingLT1 · 01-13-2026, 10:23 AM

unmetered air entering the engine. Recheck your install and connections.

bishopts · 01-13-2026, 10:49 AM

Its really rare for me to disconnect the battery on cars when I'm working on them and probably 90% of the time i will get a MAF code on GM cars when i need to unplug them to access something.
I would guess you have codes for mass air circuit and intake air temp circuit and probably barometeric circuit fault codes. That will need to be cleared with a scanner/code reader.
In my case I usually plan on doing a post repair scan of the vehicle so that's why i don't waste my time unplugging the battery.

I would do yourself a favor and put some dielectric grease on the plastic of the MAF connector so that when you plug it in the rubber seal will slide in place freely instead of biding most of the way down and trying to roll. Ive had several cars come in after air filter changes from oil change shops with MAF connectors not seated all the way because of that.

Also check your throttle body connector.

dhoogerhyde · 01-13-2026, 07:39 PM

Thanks all . . . A simple reset. I pulled the negative on the battery last night to shut the fan up. After work today hooked up my scanner ready to do battle and nothing. No codes and car seems to be running fine. I evidently jumped the gun . . . It apparently was a MAF disconnect that needed to get back online. So again appreciate the responses folks.

2SS Capt · 01-13-2026, 10:16 PM

Quote:

Originally Posted by dhoogerhyde

Thanks all . . . A simple reset. I pulled the negative on the battery last night to shut the fan up. After work today hooked up my scanner ready to do battle and nothing. No codes and car seems to be running fine. I evidently jumped the gun . . . It apparently was a MAF disconnect that needed to get back online. So again appreciate the responses folks.

Glad you got it figured out and it was an easy fix! Thanks for the update!

Patriot Motorsports USA · 01-14-2026, 05:51 AM

I purchased the Elite AOS and when installed with their system it tied into the vacuum line that is also part of the pump for the brake booster. This setup not only caused a change in pedal feel but the canister seemed to not collect much oil vapor. Its now sitting on a shelf with the rest of the parts I have bought to see if they work.

Funny thing... the Evil Energy dual can setup for $30ea on Amazon have worked better than every other high dollar setup, placing them in series to the OEM AOS that drains to the crankcase. Only now since racing competitively with my car have I explored the Improved Racing 0.5L CCR and added the drainback function so it is a truly closed system as the OEM was.

This setup is still in development and we will test it this year in the GridLife Track Battle series. The brackets have three holes for mounting the Improved Racing CCRs or you can modify your existing setup to make it fit.

https://patriotmotorsportsusa.com/pr...unting-bracket

01-12-2026, 09:58 PM	#1
dhoogerhyde Drives: 2022 Camaro 2SS Convertible Join Date: Mar 2022 Location: New Jersey Posts: 32	CEL and fan at high speed after CAI and oil CC install I just installed a Rotofab CAI and an Elite E2 3 port oil CC. I used the Elite supplied GM style quick connects for the PCV connection and vacuum connection on the throttle body. The lower PCV connection is to the center inlet side of the CC. I have a plug in the intake tube where the sound tube would be with threaded hole and a 90 degree elbow threaded in for the 3rd port in the CC. Both check valves on the outlet side of the CC are pointed away from the CC. I did forget to disconnect the battery when unplugging the MAF to install the CAI.The CAI install was without issue following all of the rest of the instructions provided by Rotofab. I don’t have the codes yet which I will pull tomorrow with my scanner. Vacuum leak? Damaged my MAF? Incorrectly routed CC lines? Any thoughts appreciated. Attached Images

01-12-2026, 11:43 PM	#2
2SS Capt 2020 Shadow Gray 2SS Drives: 2020 2SS - A10, NPP, MRC, CAI Join Date: Dec 2019 Location: SoCal Posts: 3,756	Total guess, but I would imagine the CC lines may be routed wrong, the CAI should have zero effect on anything in this situation... __________________ 2020 SGM 2SS - A10, NPP, MRC, Red Calipers, Black Fender Badge, Footwell Lighting *After delivery:* - GMP CAI, GMP Black Strut Tower Brace, MRR017 1LE Wheels, SS Armrest, Black Fuel Door, Stainless Pedals, SS Wheel Caps, GM Splash Guards, DD Smoked LED Markers, Smoked Rear Reflectors, Mishimoto Catch Can, Xpel PPF-Full Front & Rockers, 35% Tint, CeramicPro coated, RST Stainless Brake Lines, Castrol SRF, MSD Plug Wires, Mamo V3 Ported TB *Left: My "fun" ride (455 HP). Right: My "work" ride (52,000 HP): a Gulfstream G600. One's top speed is 180 Mph, the other, 620 Mph. BOTH AWESOME to operate...*

01-13-2026, 10:23 AM	#3
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,583	unmetered air entering the engine. Recheck your install and connections. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

01-14-2026, 05:51 AM	#7
Patriot Motorsports USA Drives: 2021 ZLE, C5 Z06 6.0L Procharged Join Date: Mar 2023 Location: South Carolina Posts: 527	I purchased the Elite AOS and when installed with their system it tied into the vacuum line that is also part of the pump for the brake booster. This setup not only caused a change in pedal feel but the canister seemed to not collect much oil vapor. Its now sitting on a shelf with the rest of the parts I have bought to see if they work. Funny thing... the Evil Energy dual can setup for $30ea on Amazon have worked better than every other high dollar setup, placing them in series to the OEM AOS that drains to the crankcase. Only now since racing competitively with my car have I explored the Improved Racing 0.5L CCR and added the drainback function so it is a truly closed system as the OEM was. This setup is still in development and we will test it this year in the GridLife Track Battle series. The brackets have three holes for mounting the Improved Racing CCRs or you can modify your existing setup to make it fit. https://patriotmotorsportsusa.com/pr...unting-bracket Attached Images

01-13-2026, 10:49 AM	#4
bishopts Drives: 2017 2ss 6mt Join Date: Mar 2024 Location: dallas Posts: 1,238	Its really rare for me to disconnect the battery on cars when I'm working on them and probably 90% of the time i will get a MAF code on GM cars when i need to unplug them to access something. I would guess you have codes for mass air circuit and intake air temp circuit and probably barometeric circuit fault codes. That will need to be cleared with a scanner/code reader. In my case I usually plan on doing a post repair scan of the vehicle so that's why i don't waste my time unplugging the battery. I would do yourself a favor and put some dielectric grease on the plastic of the MAF connector so that when you plug it in the rubber seal will slide in place freely instead of biding most of the way down and trying to roll. Ive had several cars come in after air filter changes from oil change shops with MAF connectors not seated all the way because of that. Also check your throttle body connector.

01-13-2026, 07:39 PM	#5
dhoogerhyde Drives: 2022 Camaro 2SS Convertible Join Date: Mar 2022 Location: New Jersey Posts: 32	Thanks all . . . A simple reset. I pulled the negative on the battery last night to shut the fan up. After work today hooked up my scanner ready to do battle and nothing. No codes and car seems to be running fine. I evidently jumped the gun . . . It apparently was a MAF disconnect that needed to get back online. So again appreciate the responses folks.

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