LS1B Chopacabra cam Magnuson Super I feel like im drowning.

[Built Tech]

I am struggling to get anywhere with the tunning this is my first time trying to tune a vehicle. I have read several forum posts and have figured out how to get the truck to idle but now it seems really fat on the tune and I don't seem to understand how to lean it out properly. I am willing to learn anything someone has to offer thanks in advance for your time and knowledge.

05 GMC Yukon XL with a 6.0L
Texas Speed Chopacabra Cam 214/222
Delphi 42# injectors 58 PSI from fuel pump
Magnuson Magna charger 8 PSI
.020 over bore

Here is a short log let me know if I have something out of place or need more data please.
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[nonnieselman]

Post your tune

Whats the part number on the injectors?

[Built Tech]

The Injector Part # 25176061

I did a study a tune LQ4 LSA that someone else posted and I tried to understand more which lead me to add a boost VE table and changing my main VE table here is the new tune and a data log from current tune. Thanks for your reply.2493824939

[nonnieselman]

Need to know what MAP sensor you have.
Here is just a startup deal.

[Built Tech]

Map sensor Part# 09359409 3 Bar

[Built Tech]

Thank you I will be going over that file so I can try to understand more about the tunning side.

[Built Tech]

I installed the tune hoping to get a log and it instantly popped.

P0103 Mass Air Flow (MAF) Sensor Circuit High Permanent ($01) EPA-Perm, Supp

I did capture a short log at idle if it helps.

24941

[nonnieselman]

Map sensor Part# 09359409 3 Bar

That is showing to be the factory 1 bar map..

[Built Tech]

Thank you I see that now that you pointed it out. I looked at one on Amazon and it was the wrong information. Would you recommend a different map or will this one suffice?

[nonnieselman]

https://www.pcmofnc.com/2020/03/12/gm-map-sensors-1-bar-2-bar-3-bar/

I would use the 2 bar on the top left in this picture. Its plenty for 8psi.

[Built Tech]

Thank you for the incite. I have installed the 2 bar sensor and the truck starts and dies within a second or two after which it cranks and stumbles but doesn't start up. Is there an adjutment that needs to be made under the Engine Diagnostics > Map section?

[nonnieselman]

Ok.
Which 2 bar did you buy?
Got to adjust the settings for it and some more settings as well.

[Built Tech]

I requested the delco part # you supplied but the parts guy ordered me a Standard AS314 after it came in he said it was a direct replacement.

[nonnieselman]

Ok making sure.
Ill update those numbers and send you a revised startup tune

[Built Tech]

Thank you for checking up and making sure I had the correct part. Sounds good I appreciate your help.

[nonnieselman]

I forgot to update those numbers.... I gotta go get the other laptop that has the newer software version..

[Built Tech]

Cool thanks I'm in Deadwood for new years which is 300 miles away from the Yukon. It will be Monday before im back. Happy New Year.

[Built Tech]

I am back from vacation and I am hoping to get this Yukon up and running is there anything you need from me on this end data or parameters wise?

[Built Tech]

Here is a speed density data log. I am trying to understand what I am looking at in the maps vs what I will change in my VE table, is it correct to have dyncylair / LTST as the table I am looking to lean out? Thanks in advance for any pointers or tips.

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