LS2 swapped 69 Firebird tune review?

[Havoc84]

I'm hoping someone could take at the two logs and the tune settings I currently have.

I have a Roto-Fab intake and LT headers and that's it mod wise, and while I was able to get the car to idle and drive it's pretty sluggish and hesitates some driving. The last few times I drove the car out of my neighborhood I gave it a little throttle it sputtered and stalled. I have to wait a few minutes before I can get it to start again and give it very light throttle to drive it home. I think I am running into some kind or TQ reduction or reduced power mode that is holding the car back. Id really like to start enjoy driving the car after finally getting the car back from body and paint.

I also got the following codes today

1. P0068 MAP/MAF Throttle Position correlation
2. P0106 Manifold Absolute Pressure/Baro Sensor range/performance
3. P0352 Ignition coil B Primary/Secondary Circuit
4. P1101 Mass airflow sensor out of Self Test range

Any help is greatly appreciated and if needed I am will to pay someone to help me dial this in. Please DM me if you are a reputable tuner and are interested.



1969 Firebird Ls2 rev 2 Finally w speedo correction.hpt
cruise 2.hpl
Idle 11-5.hpl

[LS ROB]

just glancing at the tune, you may want to put your Base Running Airflow table back to stock. It should have numbers where it is zero'd out. (your Idle rpm area) id probably stick a 6 in there to start with. If it were me, id put it in MAF only until i got things sorted. Looks like you have a lot of work to do yet. Im not exactly certain on your codes that were thrown, but on swap vehicles, you can turn some of them off that is not needed. Things like Fuel pump control module or wheel speed sensors etc. Listing all mods and what transmission you are using would help other forum members to accurately offer solutions. The more detail the better. Hope that helps.

[Havoc84]

Thank you LS Rob!

It?s an LS2 from a 2005 corvette. I?m using the E40 ECU, DBW pedal from the vette. I have it mated to a 4L60E from a 02 Trans am. The only mods are the air intake and the long tube headers. I ran into an idle issue (surging) before which I believe is related to the O2?s being further down stream.

I will return the base running airflow back to stock, and put it in maf only to see how that does.

[LS ROB]

so, i just pulled a tune from the repository for a 2005 vette 6.0 automatic car and it has the same numbers missing in the Base Running Airflow table, so yours may be correct. After looking at the tune from the repository, id do 2 things for sure. 1.) put the MAP settings back to stock MAP LINEAR 94.43 MAP LINEAR B 31.48 MAP OFFSET 10.33; and 2.) Put it in MAF only until you get it sorted. Honestly, you could go:AIRFLOW>DYNAMIC, set the High RPM Disable back to 3600 rpm and the High RPM Re-enable to 3500 (stock) to see if that helps.

[blindsquirrel]

P0352 is for sure not a tune issue.

Conditions for Setting the DTC
The ECM detects the IC circuit is grounded, open, or shorted to voltage for less than 1 second.

You might want to go through your DTC list again, some stuff got overlooked.

Why did this get the 2-bar OS? Not that there aren't some justifiable reasons for it without boost, just want to check that it didn't get applied on accident.

[blindsquirrel]

screenshot.08-11-2022 00.34.29.png

[Alvin]

I'm hoping someone could take at the two logs and the tune settings I currently have.

I have a Roto-Fab intake and LT headers and that's it mod wise, and while I was able to get the car to idle and drive it's pretty sluggish and hesitates some driving. The last few times I drove the car out of my neighborhood I gave it a little throttle it sputtered and stalled. I have to wait a few minutes before I can get it to start again and give it very light throttle to drive it home. I think I am running into some kind or TQ reduction or reduced power mode that is holding the car back. Id really like to start enjoy driving the car after finally getting the car back from body and paint.

I also got the following codes today

1. P0068 MAP/MAF Throttle Position correlation
2. P0106 Manifold Absolute Pressure/Baro Sensor range/performance
3. P0352 Ignition coil B Primary/Secondary Circuit
4. P1101 Mass airflow sensor out of Self Test range

Any help is greatly appreciated and if needed I am will to pay someone to help me dial this in. Please DM me if you are a reputable tuner and are interested.



1969 Firebird Ls2 rev 2 Finally w speedo correction.hpt
cruise 2.hpl
Idle 11-5.hpl

The map sensor looks suspect. Its got a 2 bar OS on it for a 2 bar Map sensor.. but does this have a 1 bar sensor in it? Looks like it may?

Looks way lean at wide open. Generally looks like it needs to be tuned.

The P0352 needs to be fixed.

[Havoc84]

I will run the DTC list again. I'm fairly new to HP tuners so I'm not sure how or why it has a 2 bar OS. Should be a basically stock NA application (Mines air intake and LT headers).

The harness is from BP Automotive, and I already tried swapping the coil sets and I still got the P0352 code so I might have a pinched (orange) wire somewhere. I will take another look.

I also set the MAP settings back to stock (I'm not sure how those got changed in the first place) and changed the dynamic AF RPM settings as Rob said. I will give that a go and report back.

Thank you guys

[Havoc84]

The map sensor looks suspect. Its got a 2 bar OS on it for a 2 bar Map sensor.. but does this have a 1 bar sensor in it? Looks like it may?

Looks way lean at wide open. Generally looks like it needs to be tuned.

The P0352 needs to be fixed.

I ran the MPN for the MAP sensor in it and it comes back as 16212460 (AC Delco) which looks to be a 1 bar map sensor. The engine is NA so it shouldn't have a 2 bar sensor correct? Doing a parts search for another AC delco map sensor for a 2005 vette came back with PN 12614970 which is also a 1 bar. Is there another change I need to make to correct this? Also I scheduled a dyno tune with a local LS tuning specialist in a couple weeks. I would like to make sure I have everything sorted out and ready to go (at least as much as possible) before then.

[blindsquirrel]

The MAP linear/offset got changed automatically when the 2-bar OS got accidentally applied. There's a very specific procedure that has to be followed for applying/flashing the custom OS, if you don't know how or why it got done I'm a little worried that it might not have been done correctly.

[Havoc84]

The MAP linear/offset got changed automatically when the 2-bar OS got accidentally applied. There's a very specific procedure that has to be followed for applying/flashing the custom OS, if you don't know how or why it got done I'm a little worried that it might not have been done correctly.

I re-flashed the initial 1 Bar OS back into the car and deleted Vats. It ran a hell of a lot better and idled great, so great catch and thank you very much! I have a dyno tune scheduled in a couple weeks to finish it up and dial it in. (It stumbled slightly under a decent amount of throttle, but much better than before)

[Alvin]

I re-flashed the initial 1 Bar OS back into the car and deleted Vats. It ran a hell of a lot better and idled great, so great catch and thank you very much! I have a dyno tune scheduled in a couple weeks to finish it up and dial it in. (It stumbled slightly under a decent amount of throttle, but much better than before)

You can stay with the 2 bar OS but the map sensor linear and offset need to be set to the map sensor you are using. The file you posted had settings for a 2 bar map sensor.

[Havoc84]

I wanted to follow up and say thank you so much for your guy’s help. I ran into a few major hiccups that left me on the verge of going insane lol. My limited experience with HP tuners hindered me along with a somewhat unique LS swap conversion made it extra Spicy to deal with.

To start I should never have applied the 2 bar operating system. Going back to 1 bar allowed the car to run and idle normal. The second issue I ran into was somewhere in my tune (stock 05 vette) that was causing my transmission to bind up (brakes dragging feeling) and overheat which destroyed the 3/4 clutch pack. So I rebuilt the trans, installed it with again the same issue. I did change the gearing and tire size accordingly (maxed out misfire tables, etc) but still ran into this issue. Then I bought a performa built 4l60e and only to have the same binding overheat issue. So I knew it was time related. I updated the sps programming via tech line to ensure a ECM-TCM match which helped some but after 20 mins or so of driving the issue happened again. What finally fixed my last huge pain in my ass issue was copying over the TCM settings from a 05
GTO that has the trans and settings like my current setup and not in a transaxle setup. I used Bluecat to adjust shift and TCC settings and BOOM it all finally works.

I’m by no means a tuning expert, but I hope that my situation and solution might help someone else in the future doing a similar swap.