Jump to content

AFM Disable Question

ducks1992

By ducks1992
in Modifications & Accessories

 Share

Recommended Posts

ducks1992 New Member

ducks1992

Posted
Posted

I know this topic has been posted about a thousand times but I need to ask. If I disable my AFM with a DiabloSport i3 Tuner do I also have to change the camshaft, lifters etc etc? I am worried about damaging my engine as this truck is very special to me. Thank you everyone in advance.

M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted

No, you don't have to change anything physical. The programmer re-programs the ecu, telling it not to engage afm. From then on it will stay in v8 full time.

ducks1992 New Member

ducks1992

Posted
  • Author
Posted
7 minutes ago, M1ck3y said:

No, you don't have to change anything physical. The programmer re-programs the ecu, telling it not to engage afm. From then on it will stay in v8 full time.

Awesome! I have read people installing an Oil Catch Can. Do I need to install this? Also I have a K&N aftermarket intake pipe and filter installed. Will that affect anything?

M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted
11 minutes ago, ducks1992 said:

Awesome! I have read people installing an Oil Catch Can. Do I need to install this? Also I have a K&N aftermarket intake pipe and filter installed. Will that affect anything?

 

No you don't need a catch can to disable afm. Your air intake will not affect anything. 

jrmcswain Enthusiast

jrmcswain

Posted
Posted
1 hour ago, ducks1992 said:

Awesome! I have read people installing an Oil Catch Can. Do I need to install this? Also I have a K&N aftermarket intake pipe and filter installed. Will that affect anything?

I Have a 2017 6.2L that was modified by Hennessey Performance. Which includes a Whipple supercharger. After 3 or 4 months, my oil catch can is dry.

 

Supreme Pizza Senior Enthusiast

Supreme Pizza

Posted
Posted

Agreed, all that you need to do is program the computer not to use AFM anymore. That alone will greatly reduce the likelihood of lifter failure. If you want to take it a step further, you can pull the valley cover, and drive a metal plug down into the oil pathway that supplies oil to the VLOOM, and then cut sections of the gasket out of the oil pathways between the VLOOM and the head. That will insure that oil pressure doesn't build up in that area (from the opposite direction) and trigger a lifter pin to get jammed in the wrong spot, causing a collapsed AFM lifter. I did all of these steps on mine when I replaced #7 AFM intake lifter. Note, the VLOOM can not be removed from the engine, and you want to leave it plugged in as well - even though its not in use anymore.

Supreme Pizza Senior Enthusiast

Supreme Pizza

Posted
Posted

I do the AFM delete, as listed above.

 

I also put on Wheel spacers, and lift spacers.

 

I always add a cattle guard and rain gutters.

 

Gotta have the backup cam and in dash DVD of course.

 

I have a hidden kill switch to prevent theft.

 

I also rewire the power outlets so they turn off with the key.

 

And so on...

M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted
On 12/22/2021 at 7:22 PM, Supreme Pizza said:

I do the AFM delete, as listed above.

 

I also put on Wheel spacers, and lift spacers.

 

I always add a cattle guard and rain gutters.

 

Gotta have the backup cam and in dash DVD of course.

 

I have a hidden kill switch to prevent theft.

 

I also rewire the power outlets so they turn off with the key.

 

And so on...

 

Where do you put the kill switch.

M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted
On 12/22/2021 at 5:32 PM, jrmcswain said:

I Have a 2017 6.2L that was modified by Hennessey Performance. Which includes a Whipple supercharger. After 3 or 4 months, my oil catch can is dry.

 

 

That's impressive! I'm assuming you do plenty of wot too?

Supreme Pizza Senior Enthusiast

Supreme Pizza

Posted
Posted
15 minutes ago, M1ck3y said:

 

Where do you put the kill switch.

 

 

 

I have installed them on every rig I have owned for the last.... 30+ years.


I install them on other people's rigs too.


It really depends on your personal preference and the amount of time you want to spend installing it.


All you have to do, is make it very convenient and easy for you to operate, and "not obvious" to the car thief.


Basically you "break" the truck. So even with the keys it wont start. As long as the thief doesn't find the kill switch, then they would need to use a tow truck to steal the rig.


Disguise it as an OEM fog light switch, or a switch under the seat. You can put them under the sun visor mirror cover, or in the glove box. Next to the seat, under the dash, or it can be done with a remote control using a relay. You can tap into the fuel pump, ECU, starter, etc.

 

The most famous bank robbery in Hollywood was foiled by a hidden fuel pump kill switch on some old crappy pickup truck. One of the robbers tried to car-jack a truck during the escape. The driver said no problem, take it - and he flipped the fuel pump kill switch off on his way out of the rig.

 

That robber got caught.

 

After suffering a leg injury from police gunshots, the other guy blew his own brains out with a 9mm before capture.

 

 

 

 

e1616675abdd5a06a9228c16d44659c2.jpg

  • Like 2
JimCost2014 Senior Enthusiast

JimCost2014

Posted
Posted
On 12/22/2021 at 6:22 PM, Supreme Pizza said:

I also rewire the power outlets so they turn off with the key.

Out of curiosity, what year is your current truck?

 

The K2's are pretty easy to do that "mod", you just move a 50-amp fuse one spot.

Supreme Pizza Senior Enthusiast

Supreme Pizza

Posted
Posted
8 minutes ago, JimCost2014 said:

Out of curiosity, what year is your current truck?

 

The K2's are pretty easy to do that "mod", you just move a 50-amp fuse one spot.

 

 

The current vehicle that I'm working on is a 2008 Chevy Suburban. I don't think moving the fuse is an option on my rigm but it might be. What do your sources indicate?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That is a fair point, and I think an OBD-first proof is probably the right next step. I agree that the value is not the hardware box by itself. The marketable part would be the software: always-on capture, baseline learning, event reduction, system-specific reports, and alerts. Also agreed that if an OBD device is always plugged in and has local storage, it should not miss the event in the same way that a scanner plugged in after the fact would. The only thing I would not want to assume yet is that an ELM327-class device gives all the late-GM data needed at the rate needed. Standard OBD live data, DTCs, freeze frame, Mode 6, VIN, and calibration information are definitely the right starting point. GDS2 also proves that a lot of useful ECM data can be viewed through the DLC without needing a DTC first. The question I need to test is whether the data needed for a useful GM V8 event report is actually available through the DLC, and at a useful sample rate: - misfire counts / roughness by cylinder - AFM/DFM state - oil pressure and oil temperature - fuel trims - voltage / reset context - U-codes and communication events - calibration / software information - whether these are standard PIDs, enhanced DIDs, Mode 6 data, GDS2-only data, or not available So I think the right benchmark is: 1. Build the OBD-only version first. 2. Keep it plugged in and logging locally. 3. Compare it against GDS2 / freeze frame / HP Tuners or another higher-end logger. 4. Measure which parameters are available and at what update rate. 5. Only justify ECM-side hardware if it captures useful evidence the OBD version cannot. So you may be right: the consumer product might simply be an always-plugged-in OBD event recorder with much better reporting. A question for you: when you say ELM327 devices can already deliver all the data needed, do you mean generic OBD Mode 01 data only, or GM enhanced data as well? For a useful GM V8 report, would generic OBD data be enough, or would you expect the tool to include enhanced items like misfire by cylinder, AFM/DFM state, oil pressure/oil temp, U-codes, and calibration information?
    • Buckwild27
      Gas Prices

      By Buckwild27 · Posted

      I agree. 
    • Atlas
      Gas Prices

      By Atlas · Posted

      87 down as low as $5.14 here... winning!
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Progress... sort of.   Intake is disassembled, spider is out, fuel lines removed. Used a torch on the stripped screw with the lower intake off, much easier when I've got the intake sitting on my workbench, I made it talk. Walked right out with a pair of vice grips once it was nice and toasty hot.   New parts are piling up on my service cart waiting to be installed. Distributor, temperature sensor, new gaskets, fuel line kit, themostat, water neck.   My new pickle is I don't want to spend $600 on a replacement spider. I'm not sure IT is bad. I'm probably splitting hairs. Or it's $300 to send mine away and another 3 weeks of the truck just sitting. I have half a mind to assemble everything with the old spider to see if I can get away with just replacing the fuel pressure regulator to be safe. The obvious issue was the gushing high pressure fuel line which will be replaced. Getting to the spider really isn't that hard, and now I know what I'm doing , swapping it would be a breeze should it absolutely need one. Stupid, or smart?   The part that gives me pause is replacing the distributor. Well, it's already out. And I didn't mark it, whoopsie! Engine was at TDC when I removed it, I know that, so upon correct reinstall the metal tip on the rotor should point to the TDC mark on the distributor because that's where it was pointing on the old distributor. Worst case I'm a tooth off and have to re-stab it.   But then, what? I assume the truck will start. It doesn't appear the timing can be set. Here's the problem: These distributors can't be rotated but a degree or two, by design. What I read is Cam ****** needs to be -2 to +2 degrees, ideally at 0 (and checked/set above 1000 rpm). There should be enough wiggle to get that properly set, but checking the reported value is another potential issue. My Actron 9185 scanner says it supports enhanced GM PIDs and Cam ****** is one of them but it's unclear that I'll be able to correctly see it over OBD 1.5. I can see why people end up junking these things with life left in them. They're an absolute nightmare with tweener-year diagnostics/electronics and unobtanium parts.   Fingers crossed it starts and idles nicely. There can be hope, right? I'ma buy a lottery ticket the same day just in case.   Next steps..DO IT. I have not installed an intake before so I've been reading and watching a lot. Some say NO RTV except on china walls, some say DO RTV on water ports but not fuel/air intake. 1/4 or 3/8 bead on China walls? I think my strategy will be, obviously, RTV china walls with overlap on the gasket corners. Chapstick-style RTV the water ports. Leave intake ports dry. The only set of intake gaskets I could find locally are Edelbrock performance gaskets (uh...for an asthmatic 190hp V6? LOL) so we'll see how they do.   #NoToolLeftBehind. It took an hour, but my recovery mission for my deep 10mm socket was successful. It had rolled down the bellhousing and wedged itself between what I think are the fuel lines? I couldn't see it at all, but with a junk antenna I had laying around, I blindly went poking/sweeping for it, heard it clink, raised the truck, and caught a sliver glimpse of chrome with a flashlight way up there in Narnia. I had pushed it farther along the lines holding it captive, but within access of severely improvised tools, poking and cursing at it to finally knock it free to where I could get a fingertip on it to bring it home.    Not much to see.      
    • RyanbabZ71
      Gas Prices

      By RyanbabZ71 · Posted

      Thats crazy considering im right next door (Indiana)

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...