2013 Yukon Denali Hybrid AFM Delete won't pass emissions

[HybridYukon13]

Hi,
I had a lifter collapse on my 2013 Yukon Hybrid and we did a AFM Delete on the motor.
It is now due for emissions and it keeps coming as "not ready" for the test.
Report is showing catalyst convertor, evap, oxygen sensor & oxygen sensor heater are not ready for testing.

I got a splitter for the AFM so it could stay plugged in while the emissions place also plugs their stuff in. Didn't work.

I have not tried to do a drive test in consecutive order but will do this tomorrow.
cold start, AC & rear defrost on, accelerate to 55+ for 3 minutes, decelerate to 20mph, accelerate to 55+ for 5 minutes, decelerate to 20mph

Does anyone have any ideas of what I can do to get my car past emissions?!

Thanks so much for any help!!!!

 

[Tahoe14]

@j91z28d1

 

[Fless]

Hit the link below and scroll down to the drive cycle details in post #3. There are some very specific conditions (fuel level, ECT vs IAT absolute and delta, etc.) that need to be met for the cold start and if those aren't met, nothing's going to happen.

Proper drive cycle to register EVAP monitor for emissions

www.cadillacforums.com

Some scanners can also perform some monitor tests.

 

[j91z28d1]

Hi,
I had a lifter collapse on my 2013 Yukon Hybrid and we did a AFM Delete on the motor.
It is now due for emissions and it keeps coming as "not ready" for the test.
Report is showing catalyst convertor, evap, oxygen sensor & oxygen sensor heater are not ready for testing.

I got a splitter for the AFM so it could stay plugged in while the emissions place also plugs their stuff in. Didn't work.

I have not tried to do a drive test in consecutive order but will do this tomorrow.
cold start, AC & rear defrost on, accelerate to 55+ for 3 minutes, decelerate to 20mph, accelerate to 55+ for 5 minutes, decelerate to 20mph

Does anyone have any ideas of what I can do to get my car past emissions?!

Thanks so much for any help!!!!

wait.. you did a put non afm lifters in and not turn it off in the tune but still use the plug in to the obd2 port dongle thingy?

I've not used those, but thats now how I understood those to work. I thought once you removed the vlom solenoids you needed to turn it off in the tune and also those dongle work by blocking requesting something that also keeps the monitors from setting. so even thou you have a open obd2 port for testing. you're going to have to run it without the dongle to get anything ready.

what cam and lifters did you go with? how does it run?

 

[HybridYukon13]

Hit the link below and scroll down to the drive cycle details in post #3. There are some very specific conditions (fuel level, ECT vs IAT absolute and delta, etc.) that need to be met for the cold start and if those aren't met, nothing's going to happen.

Proper drive cycle to register EVAP monitor for emissions

www.cadillacforums.com

Some scanners can also perform some monitor tests.

Thank You...I will look into this. The scanner that we have finally indicated that all systems were "ready" over the weekend. I took it back in yesterday to emissions and same thing happened...they indicate that the systems weren't ready to test. I am starting to get heartbroken as my Yukon is immaculate for having 100,000 miles and I absolutely love it. They won't grant me a waiver saying I've "tampered with the vehicle"

 

[HybridYukon13]

wait.. you did a put non afm lifters in and not turn it off in the tune but still use the plug in to the obd2 port dongle thingy?

I've not used those, but thats now how I understood those to work. I thought once you removed the vlom solenoids you needed to turn it off in the tune and also those dongle work by blocking requesting something that also keeps the monitors from setting. so even thou you have a open obd2 port for testing. you're going to have to run it without the dongle to get anything ready.

what cam and lifters did you go with? how does it run?

Hi, we have ran it and ran it and finally got all the systems to indicate they were "ready" I took it back to emissions yesterday and they indicated that all systems were "not ready" I haven't tried an emmission test without the dongle so I may do that next.
We sent my control module off to be retuned when we initially did the delete but the guy sent it back because it was a hybrid and said it couldn't be tuned.

We found someone local yesterday who is looking into it for me.

We put non AMF stock 6 liter lifters in it.
It's driven 100% fine in the 1.5 years since we did it.
I am gutted as I love this damn car and it is immaculate for my 100,000 miles I have on it and has a lotta life left to go.

Emissions told me since I have "tampered" with the original hybrid equipment they would never issue a waiver for it.

 

[Marky Dissod]

We sent my control module off to be retuned when we initially did the delete but the guy sent it back,
because it was a hybrid and said it couldn't be tuned.

Email pcmperformance.com.

 

[Doubeleive]

Hi, we have ran it and ran it and finally got all the systems to indicate they were "ready" I took it back to emissions yesterday and they indicated that all systems were "not ready" I haven't tried an emmission test without the dongle so I may do that next.
We sent my control module off to be retuned when we initially did the delete but the guy sent it back because it was a hybrid and said it couldn't be tuned.

We found someone local yesterday who is looking into it for me.

We put non AMF stock 6 liter lifters in it.
It's driven 100% fine in the 1.5 years since we did it.
I am gutted as I love this damn car and it is immaculate for my 100,000 miles I have on it and has a lotta life left to go.

Emissions told me since I have "tampered" with the original hybrid equipment they would never issue a waiver for it.

it's never going to be ready until you get rid of that dongle and get a proper tune, the hiccup here is it's a hybrid so someone has to work around that.
when the tune is done and it is finally really "ready" you do not have to say anything about it, just get it smogged like normal

 

[j91z28d1]

hptuners will disable afm and all monitors will set.

I have done it on my 2011. so don't listen to anyone that says a hybrid can't be done.

worse case you buy hptuners, 2 credits. change one drop down box and then sell hpt if you don't need it. or find a local that has it and willing to do it for you.


curious thou, did you change the cam or just drop in 16 new non afm lifters on top of the old cam? did you replace the vlom with a non afm flat one? I only ask cause usually guys that try dropping in new lifter on the afm cam have a missfire and guys that do a delete kit which is cam, lifter and top plate. the truck runs like crap with just dongle turning it off.

 

[HybridYukon13]

it's never going to be ready until you get rid of that dongle and get a proper tune, the hiccup here is it's a hybrid so someone has to work around that.
when the tune is done and it is finally really "ready" you do not have to say anything about it, just get it smogged like normal

Thank You! I set up some appointments with a few places in town so hopefully one of them will be able to get it tuned. First one is Saturday so fingers crossed that one works. I appreciate your taking time to respond. Will let you know how it goes!

 

[j91z28d1]

tell the tuner if he's using hpt tuners to license the tune, and then change the drop down box for afm from whatever it is to what it's not now.. reflash the truck and go test drive it. what is in the box doesn't matter, just change it to the other thing. depending on the version of hptuners he has on his laptop, some have reportered it as labeled incorrectly at first and fixed in later updates. as in sometimes the factory tune shows disabled(while it's actually working) for other people it shows enabled. it doesn't matter, just change it to the other one and save. it will disable it.

good luck.

everyone sees hybrid and freaks out. its annoying

 

[HybridYukon13]

hptuners will disable afm and all monitors will set.

I have done it on my 2011. so don't listen to anyone that says a hybrid can't be done.

worse case you buy hptuners, 2 credits. change one drop down box and then sell hpt if you don't need it. or find a local that has it and willing to do it for you.


curious thou, did you change the cam or just drop in 16 new non afm lifters on top of the old cam? did you replace the vlom with a non afm flat one? I only ask cause usually guys that try dropping in new lifter on the afm cam have a missfire and guys that do a delete kit which is cam, lifter and top plate. the truck runs like crap with just dongle turning it off.

Hi! I found a local guy who tuned it and all is perfect now!

We did not change the cam and we did put non afm lifters on it.
Ive been driving it for about 1.5 years with zero issues.
My gas mileage has gone down about 2mpg but other than that its just fine.
The lifter collapsed with about 87,000 miles on it and In just about to turn 100,000.

 

[Marky Dissod]

Hi! I found a local guy who tuned it and all is perfect now!

We did not change the cam and we did put non afm lifters on it.
Ive been driving it for about 1.5 years with zero issues.
My gas mileage has gone down about 2mpg but other than that its just fine.
The lifter collapsed with about 87,000 miles on it and In just about to turn 100,000.

Is your tuner's secret sauce so secret,
that not only will you not give us any clue what your tuner did,
but you also won't tell us his (business) name?

 

[j91z28d1]

Hi! I found a local guy who tuned it and all is perfect now!

We did not change the cam and we did put non afm lifters on it.
Ive been driving it for about 1.5 years with zero issues.
My gas mileage has gone down about 2mpg but other than that its just fine.
The lifter collapsed with about 87,000 miles on it and In just about to turn 100,000.

that's awesome. there's been a few people try putting non afm lifters on a afm cam and they seem to always have bad results. like missing and running badly. that's awesome that it worked for you.

thanks for the update.


now I have even more questions lol. I wonder if the hybrid cam being different grind allows for the lifter change on the oem cam. huh.

 

[HybridYukon13]

Is your tuner's secret sauce so secret,
that not only will you not give us any clue what your tuner did,
but you also won't tell us his (business) name?

never said it was a secret...he tuned it with his computer program.....took about 20 minutes

 

[Marky Dissod]

Ok, so, the details of his tune are a secret, and he is a secret ...
got it.

 

[j91z28d1]

Ok, so, the details of his tune are a secret, and he is a secret ...
got it.

what exactly are you asking him?
dude went to a shop and they changed one drop down box under afm. wrote that to the ecm and he drove away? I doubt he knows or cares what the tech's name was or what software he used. 99% chance it was hptuners.

 

[Marky Dissod]

For example:
my tuner was (and is) pcmperformance.com.
On my 2013 YXL, he:
addressed the spark timing tables for crisper throttle response, power, MpGs
reduced DFCO spark timing so it would coast 'lighter' and longer than GM's setting in upper gears
raised the WOT Upshift & Downshift RpM thresholds
made the 'Normal' Up & Down Shift Points table more enthusiastic, especially over 37% TPS
made the 'Tow/Haul' Shift Points table Tow-ier / Haul-ier
improved powertrain braking in lower gears

*accommodated my special request
INCREASED the V4 mode duty cycle and availability at lower speeds / gears
so I could putt around gently in metro/urban stop'n'go using more V4 mode than GM originally intended
*after a few years of mildly improved city MpGs, this eventually caused increased oil consumption
I will never do this again.
*What I might try in the future (?) - instead of disabling the V4 mode flag -
raising the V4 mode enable coolant temp threshold to 221F,
so that V4 mode only ever activates if the engine is running hot enough
that it might be in danger of overheating; might buy another 5min

But if he doesn't think his tuner deserves a recommendation here on this forum,
so others can appreciate the benefits, like I said, got it.

 

[j91z28d1]

dude it's a hybrid, this is a hybrid sub forum. literally none of that can be tuned.

hptuners has a small hand full of things defined for the 67A ecm. you can't even adjust Maf fueling vs Hz. which is the the very base of any fuel tuning. you can change the PE target fueling but it's a hybrid, who dynos a hybrid and tunes wot? it can't even identify the hybrid transmission controller, it's some one off maybe Allison based hardware, then custom software written for it by gm, dodge, BMW and can't remember but maybe Mercedes collaboration. they started with a Allison hybrid bus transmission and scaled it down to a passenger vehicle. there's a fwd version too.

I'm telling you exactly what he did. he licensed the tune, changed one drop down box. wrote back to vehicle and droveit back around front for him. which is exactly what he asked for and wanted, just make it mass the emissions monitors

These don't have a torque converter to adjust lock up. there is no tow haul mode, as there is no over drive. it's a 4 speed tranny with 4th being 1:1. any over driven gear ratios are completely electric motors inside the tranny driven.

 

[BG1988]

it's never going to be ready until you get rid of that dongle and get a proper tune, the hiccup here is it's a hybrid so someone has to work around that.
when the tune is done and it is finally really "ready" you do not have to say anything about it, just get it smogged like normal

He can try getting it READY in M4 this will RUN v8 Mode only, without the dongle