AFM delete - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

stang stopper · 12-29-2019, 09:08 PM

I tuned out the AFM with Hp tuners. My engine light is on, and if I turn if off and start the car. The light comes back on and the oil pressure gauge drops and the engine shuts down. After restarting the light is on, the oil pressure is normal and it's runs fine. Any suggestions on what might be the problem.

Tajefe Couple · 12-29-2019, 09:56 PM

Thought the cams for AFM are ground special for AFM. Doesn't seem like you could just turn it off

Yes I've heard people do and sell devices to do so, but I think you need the supporting mods first

Batmanntexas · 12-30-2019, 07:50 AM

While there may be a cam difference between the LS3 and the L99 (AFM/VVT variant), the real difference is in the lifters (8 of them) that are controlled by the computer. The computer commands 4 electric solenoids that either allow or block oil passage to those lifters, thereby controlling the valves for those cylinders.

Did you do anything mechanically to the engine when you were disabling AFM? Just using HP Tuners to disable AFM should not have caused any type of oil pressure issues, IMO. To me, that sounds like a mechanical issue of some sort.

Can you post your tune file for us to check out?

Juiced1 · 12-30-2019, 08:34 AM

Disabling it in the ECM shouldn't effect anything else. You might have another issue to look at. Start with that cel you got, you should be able to read it with your HP tuners.

ChibiBlackSheep · 12-30-2019, 08:49 AM

How did you do it? Did you just switch DOD to disabled in the tune, save it and call it a day?

That shouldn't have affected anything. That's how I have my winter tune set up.

stang stopper · 12-30-2019, 10:51 AM

Quote:

Originally Posted by ChibiBlackSheep

How did you do it? Did you just switch DOD to disabled in the tune, save it and call it a day?

That shouldn't have affected anything. That's how I have my winter tune set up.

I did the delete over six months ago, it's on my son's car and there are no drivability issues at all. Only upgrade is long tube headers. I'm going to enable the AFM and see what happens with the engine light.

ChibiBlackSheep · 12-30-2019, 10:54 AM

Quote:

Originally Posted by stang stopper

I did the delete over six months ago, it's on my son's car and there are no drivability issues at all. Only upgrade is long tube headers. I'm going to enable the AFM and see what happens with the engine light.

What's the CEL? If you have long-tubes, is it a catalytic code? Or is the car leaning out too much? Did you tune for the long-tubes?

SSEssence · 12-30-2019, 11:03 AM

A lot of people tune out AFM so that shouldn't be an issue. I would start with getting the code read and go from there.

12-29-2019, 09:08 PM	#1
stang stopper Drives: 45th anniversary camaro ss Join Date: Sep 2014 Location: South Carolina Posts: 131	AFM delete I tuned out the AFM with Hp tuners. My engine light is on, and if I turn if off and start the car. The light comes back on and the oil pressure gauge drops and the engine shuts down. After restarting the light is on, the oil pressure is normal and it's runs fine. Any suggestions on what might be the problem.

12-29-2019, 09:56 PM	#2
Tajefe Couple Drives: Never just fly under the radar Join Date: Jul 2015 Location: Kansas Posts: 1,531 View My Garage	Thought the cams for AFM are ground special for AFM. Doesn't seem like you could just turn it off Yes I've heard people do and sell devices to do so, but I think you need the supporting mods first __________________ 1-8-4-3-6-5-7-2 Old Skool

12-30-2019, 07:50 AM	#3
Batmanntexas Drives: 2012 Camaro SS (2SS) Join Date: Aug 2012 Location: Stafford, VA Posts: 1,374 View My Garage	While there may be a cam difference between the LS3 and the L99 (AFM/VVT variant), the real difference is in the lifters (8 of them) that are controlled by the computer. The computer commands 4 electric solenoids that either allow or block oil passage to those lifters, thereby controlling the valves for those cylinders. Did you do anything mechanically to the engine when you were disabling AFM? Just using HP Tuners to disable AFM should not have caused any type of oil pressure issues, IMO. To me, that sounds like a mechanical issue of some sort. Can you post your tune file for us to check out? __________________ 745RWHP/634RWTQ on 93 @ 10psi 806/676 on E85 @ 10psi COTW 9/8/14

12-30-2019, 08:49 AM	#5
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,093	How did you do it? Did you just switch DOD to disabled in the tune, save it and call it a day? That shouldn't have affected anything. That's how I have my winter tune set up. __________________ LS3 Crate Engine Swap \| CSP Custom Cam 232/240 .615/.615 113 +3 \| Stainless Power LT Headers \| Z28 Intake \| Borla S-Type Exhaust \| FTI Triple-Disc Billet 3200 Stall 2012 Camaro 2SS/RS \| 1968 Camaro SS \| 2020 Cadillac CT5 Premium Luxury \| 2021 Spark LS

12-30-2019, 11:03 AM	#8
SSEssence Instagram: Sangstah Drives: 2019 Camaro 1LE Join Date: Sep 2016 Location: Buena Park, CA. Posts: 2,803 View My Garage	A lot of people tune out AFM so that shouldn't be an issue. I would start with getting the code read and go from there. __________________ 2019 SS 1LE - "CaSSandra" 2014 SS - "AleSSandra - Sold" 94 Z28 - Sold Follow the build https://www.camaro6.com/forums/showthread.php?t=612717

12-30-2019, 08:34 AM	#4
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,663	Disabling it in the ECM shouldn't effect anything else. You might have another issue to look at. Start with that cel you got, you should be able to read it with your HP tuners.