popping in throttle body when full tune enabled

[CranknChrome]

2008 6.0l in a 1969 chevelle.
Honey Badger Cam
42lb ls3 injectors
holley ultra low-ram intake and fuel rails
harness came from psi and so did the ecm

Tuned MAF first once I got it to idle. attached final maf change file 2.2.0 and the maf retry log file
Hit the throttle while in maf and it does not pop out of the throttle body

Tuned SD second 3.2.2 sd tune after sd 3.2.1 drive log.
Hit the throttle in sd and it does not pop out of the throttle body.


Put everything together and it pops as soon as the throttle is hit.
step 4.2.1 and pops with throttle hit log file.

I have added fuel down low on the VVE table
added fuel on MAF
taken out fuel on both
added 1.5x to transient fueling
changed timing
tried zeroing out the base minimum spark and also made it 10 at one point.
i thought at one point burst knock and zeroed it out as well.

changed the plugs to NGK Gpower plugs to see if it made a difference. It did not.
I tried changing injector timing. as well

I dont think it would be a valve because it runs fine locked in one mode or the other. It runs fine other wise. I just know thats the first thing people do is just hit the throttle as soon as they get in it. I want it right anyway but I am missing something.

[abc]

Looks too lean to me. (lean sneeze?) Have you put a fuel psi gauge on it and verified correct PSI? On the two logs you have the WBO2 logging, it's too lean in the heavy load areas. I think if you compared apples to apples and ran a log in just SD to compare it to your popping log you may see the difference. Right now it's too lean when you snap the throttle open and the WBO2 may confirm it and show it a little better. I don't know enough about the Gen 4 to know why it works in one or the other but not combined, but I do know it's showing too lean based on the NBO2's.
I know you mentioned you added fuel, but did you add it in the correct place? Right now the VVE table looks a little wonky.

[Alvin]

2008 6.0l in a 1969 chevelle.
Honey Badger Cam
42lb ls3 injectors
holley ultra low-ram intake and fuel rails
harness came from psi and so did the ecm

Tuned MAF first once I got it to idle. attached final maf change file 2.2.0 and the maf retry log file
Hit the throttle while in maf and it does not pop out of the throttle body

Tuned SD second 3.2.2 sd tune after sd 3.2.1 drive log.
Hit the throttle in sd and it does not pop out of the throttle body.


Put everything together and it pops as soon as the throttle is hit.
step 4.2.1 and pops with throttle hit log file.

I have added fuel down low on the VVE table
added fuel on MAF
taken out fuel on both
added 1.5x to transient fueling
changed timing
tried zeroing out the base minimum spark and also made it 10 at one point.
i thought at one point burst knock and zeroed it out as well.

changed the plugs to NGK Gpower plugs to see if it made a difference. It did not.
I tried changing injector timing. as well

I dont think it would be a valve because it runs fine locked in one mode or the other. It runs fine other wise. I just know thats the first thing people do is just hit the throttle as soon as they get in it. I want it right anyway but I am missing something.

Put your transient stuff back to stock. You shouldn't be modifying that.

Also put your MBT max spark table back to stock.

[CranknChrome]

I have put the MBT table to the stock 6.0 table out of a 2008 express van. Transients are back to stock.
Added some on ve table, still showing lean. Adding on maf table to see what it does there.
I adjusted transients to see what would happen. Sometimes it helps to change them with different intakes and customer doesn?t know what was done to the heads or block for that matter. They bought it with it all in it. We pulled the front cover off to replace the 1x gear with the correct 4x gear. So it?s a usual cluster like I normally get. ?Ready to tune?

[CranknChrome]

Also gauge reads 58psi at idle, 58psi under load, and 58 when I hit the throttle. I found a paper where they bought it from psi. It says 42lb injectors, map 2009+, I looked at the flow rate and those were correct numbers for the 42lb injectors.

[ns158sl]

Its the intake manifold. I just went through the exact same thing. The injector angle is canted opposite of what it actually should be. There will be no fix. You can jack up transient fueling to some degree, but it will still have the lean tipin, backfire, and also the transient will be skewed in other regions of driving.

[CranknChrome]

Yikes. So you think manufacturing defect with the one manifold or across or rather two at this point. That?s an insane catch. How did you get to the point of figuring it out? I?ve been beating my head against the wall thinking I?ve done everything then turned here for last ditch effort.

[ns158sl]

No. It is all the Holley Modulars. The super cheap sheet metal Sniper series had better injector angle, surprisingly. My guess is the Holley ECM compensates for ridiculous fuel puddling, whereas the GM does not, being GM aims the injector at the intake valve. When I had the Holley vs a stock on the bench and half-assed checked with a cheapy angle finder, it was astonishing. Seems the FAST, BTR, and a couple others are decent. Otherwise a stock intake. Yeah I had my ass kicked pretty hard on that issue.

Also, IDK how this is not mentioned more on this forum, let alone Holley hasnt fixed the issue, especially it seems there are thousands+ running those shit ass intakes.

Ive done extensive steady state climate controlled airflow modeling with that intake and a stock intake. I am 100% confident it is the intake.

[CranknChrome]

Pulled intake off. Its a cathedral port intake on a rectangle port head
So half the port of the cathedral port is below the rectangle opening. Angle is definitley off with it not being the correct lower plenum.
Not to mention its half the size. I assumed when they bought a $1000 intake they got the correct one.
Goes to show why the ve is jacked up as well.
Thanks for the help and for the fresh eyes.