Wish mine didn't care. They did say I could put in an aftermarket air filter as long as I left the original housing and tube.
GM Bulletin on aftermarket air intakes
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jl449
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My service manager also said not to worry about my AFE intake. He said it won't void the warranty. So mix messages out there. Recently 2 valves and 2 push rods were bent. But before I towed it in -- I put the stock intake back on because I didn't want any issues even though the SM said no issues installing an aftermarket intake.
I don't blame you. The issues are not as bad, but I can sure feel the difference in the throttle. I called Chevy customer service and asked about the warranty. Like I mentioned it will be void if it's on. So glad you put it back to stock
Ken G
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I had the same issue with my '16 Silverado. I put on the K&N kit the day I brought the truck home with 186 miles on it and hated the way it has shifted since day 1. Bought my wifes new Tahoe a few months back and have been comparing the 2 two and hers is the same 5.3L, 6L90E, 3.42 Ratio set up and shifts/feels/powers completely different 100% stock. Put my stock air box on and off twice now and it's a noticeable difference when the stock is reinstalled and the shift issues go away.
It's because the newer style gm computers use multiple torque based algorithms to control tranny shifting and feel. Some intakes on some vehicles really show the affects bad when the actual air flow vs calibrated air flow vs frequency of th mass air calibration is off.
Today's cars are so finicky, that any time you change the smallest of things, it seems to throw the computer into a tizzy. I think in part, the reason why the Warranty would be voided is in order to get the CAI to actually work correctly, without the issues, the PCM would require a re-flash in order to take advantage of the new part. I know this is also the same issue with Ford and their mustang, I can't just change the CAI and expect it to work or run properly. I have a friend who had a 2016 Mustang 5.0, and it had an aftermarket CAI, and when he put the Stock unit on, the car ran like garbage, installed the aftermarket CAI and it ran like a champ. It turned out that the previous owner did a tune with the intake...
Things are not as simple as they were 30, 20 or even 10 years ago. Heck I remember someone telling me that a LS1 4th gen Firebird or Camaro when he put a K&N air filter the car would actually slow down, so this is not anything new...
Things are not as simple as they were 30, 20 or even 10 years ago. Heck I remember someone telling me that a LS1 4th gen Firebird or Camaro when he put a K&N air filter the car would actually slow down, so this is not anything new...
tdriver113
Member
I found multiple online accounts of CAI causing problems and no real gains without doing some sort of tune on newer vehicles.
Ya . It' going back to the shop. The shifts and power surges didn't stop. It' all back to stock and after a week still happening.
swathdiver
Full Access Member
My transmission began shifting softer after the Y-pipe and cats were replaced. Gas mileage has improved but shifting still soft several months later. Been too wet to datalog for a BlackBear update to the tune.
He surely did your first remote tune with the underlying problem. All you have is the information available to you at the time. A new log and it will be spot on.
so, it was mentioned earlier in this thread. but you need to read up on the magnuson-moss act.
say I install a leveling kit on my Burb. 2 weeks later the trans blows out. GM will be required to honor any/all warranties.
same situation, but this time a CV boot tears on the front axle (instead of trans failure). GM can reasonably deny coverage. Because the aftermarket component directly caused the failure.
That in essence is what the magnuson-moss act states. You can modify your vehicle. If a failure occurs, GM must prove that your modification caused the issue.
So in the case of this thread, a CAI can cause issues due to dirt, and over-oiling. Otherwise, it can't damage the vehicle. So again, if say an injector went out and washed a cylinder, GM could not deny warranty claims due to the CAI. It wouldn't hold in court and they know it. But if the MAF went bad (oily), or debris got into a cylinder...that would be a direct consequence of the CAI
All bets are off if you do custom tuning. You are pretty much guaranteed to lose if you do custom tuning and there is a motor/trans warranty claim. Too easy to tie correlations.
In this case the air intake is just as much to blame as the lift is for causing tie rod angles. The transmission in his truck relies on the accurate and factory calibrated air flow to control how the transmission works. Change the air flow of the air intake system on the new gm 6 and 8 speed trannys, and it directly affects the transmission.
Man I suck at using quotes on this site!! Lol 95 percent of the "tuners" that have hacked their way through life in the past don't know how to tune these new gm trannys because they have no idea how they work. It is NOT the same way they used to work, and oil or not causing maf contamination, I can actually blow your tranny up by changing air flow and never touch the tranny tables. I am with gm on this one.
If you don't understand how it works you won't understand why it works. All of the shift pressures and such use torque based calculations largely based off the measured air flows and such on these newer trannys. If I mess up the calculated air flow into the engine on a new 6 speed or 8 speed it messes up the pressures and timing of the transmission. It 100 percent is NOT a magnuson act claim.
Unless he has an air leak after the MAF, there is zero unmetered air getting into the motor. Biggest issue he'll see with a CAI is that more air can flow vs the factory airbox. But the MAF can still meter the volume of air. It's just a matter of the PCM being able to adjust to the increased volume...or it's too limited in the tables and cannot adapt.
I'm surprised it's not throwing a CEL. but didn't he say it's tuned?
You are thinking in the way the processors were before the last couple of years. If you change the air flow without compensating for it in the tune it can cause tranny shifting problems. It doesn't have to be an air leak, it is simply the truck thinking it is in a different state than it actually is, and it changed the way the transmission functions. If you have ten percent more air at 2 thousand rpms at a given load point, the transmission shifts like it would thinking the truck is running stock. It doesn't know the air flow has increased, the transmission shifts and pressures based off set points. You need t changed the information the computer thinks is normal to make the tranny shift normal. I am sure most intake manufactures have had to battle a bolt on intake for that reason. Some might not have it nailed down, while others do. And it is also a lot easier to screw up vehicle by vehicle now. If I add 5 percent to the maf transfer on a 2017 silverado, the tranny shifts like garbage. It's not the same anymore
Makes sense. Wonder how hard tuning the new 10 speed that Ford/GM created is? I quit running CAI's a while back. Realized they are junk unless you're actually running a hot tune with full bolt-ons. Even then, most stock air-boxes can outflow any air demands the motor needs for a NA application.
I actually ran a stock airbox with my RoushCharger vice the CAI/Elbow. Absolutely hate those oil filters.
CAI does make the motor sound better though. About all good for
I actually ran a stock airbox with my RoushCharger vice the CAI/Elbow. Absolutely hate those oil filters.
CAI does make the motor sound better though. About all good for
No time. Just the
It doesn' have a tune. Just a high flow muffler and exhaust resonator delete. And yes the maf was reading 13 at start up, which it should read 6 or 7. So almost double the ppm. I did call SLP and give them the scenarios but the saud there engineers did testing on this cai. But they did get bought out by Roush. I even called K&N and asked about a oiless filter. So my suggestion after all this is to leave the new 17 and newer vehicles stock. I agree to much computer timing things unless you truly do a total tune like Hennessey.
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