looking for some advice on...

[awdhurst]

having some issues with this tune. while driving it, the engine keep surging up and down about 40-60 rpm. here is a few hpl files

the 8th run.hpl is where I broke the super charger belt. dang

[flame]

Your LTFT are hitting -24 finish tuning it and I'll bet your problem will go away

[awdhurst]

Your LTFT are hitting -24 finish tuning it and I'll bet your problem will go away

What should I set it to??

[oakley6575]

Post the tune. And Flame is right. Your fuel trims should stay around 0. -24 is dangerous

[flame]

Your LTFT are hitting -24 finish tuning it and I'll bet your problem will go away

You need to adjust the VE table and MAF if you have one until your fuel trims are within 2-3%

[awdhurst]

You need to adjust the VE table and MAF if you have one until your fuel trims are within 2-3%

adjusted the LTFT boundaris for the map and rpm. it helped the throttle respones alot . not exatly sure what numbers to put in the VE and MAF

[Shrek]

adjusted the LTFT boundaris for the map and rpm. it helped the throttle respones alot . not exatly sure what numbers to put in the VE and MAF

Use your WBO to generate a correction factor for fueling. You are running an E67 ECM with a Trailblazer tune. Many using HPT would run a MAF only tune - as the VE (or VVE - depending on your point of view) tables often overwhelm the less experienced tuner.

Also, your 2007 tune uses a Low and a High MAF table, in 2008 these were homogenized into a single table (my preference). When altering the 2007 MAF tables - make sure the highest column in the Low table (5800 Hz) has the same values as the lowest column in the High table (5800 Hz).

[awdhurst]

Use your WBO to generate a correction factor for fueling. You are running an E67 ECM with a Trailblazer tune. Many using HPT would run a MAF only tune - as the VE (or VVE - depending on your point of view) tables often overwhelm the less experienced tuner.

Also, your 2007 tune uses a Low and a High MAF table, in 2008 these were homogenized into a single table (my preference). When altering the 2007 MAF tables - make sure the highest column in the Low table (5800 Hz) has the same values as the lowest column in the High table (5800 Hz).

something like this

[BigMike42]

You are tuning a boosted ls2 and you don't know how to tune the ve/maf table?

Learn some basics before you blow that thing up! You should have a wideband that is logged against your VE and MAF tables so you can ensure the fueling is proper.

[oakley6575]

Your going to blow this thing up. You can't tune boost without a wideband. There is no way of knowing what your fuel mixture looks like until you hear a BANG

[awdhurst]

You are tuning a boosted ls2 and you don't know how to tune the ve/maf table?

Learn some basics before you blow that thing up! You should have a wideband that is logged against your VE and MAF tables so you can ensure the fueling is proper.

I have a wideband on here showing between 14.3 to 13.8 while cruzing at 65.. 2500rpm just dont have connected to the hpt .

[awdhurst]

You are tuning a boosted ls2 and you don't know how to tune the ve/maf table?

Learn some basics before you blow that thing up! You should have a wideband that is logged against your VE and MAF tables so you can ensure the fueling is proper.

thats why im here looking for some help.. thanks

[awdhurst]

Use your WBO to generate a correction factor for fueling. You are running an E67 ECM with a Trailblazer tune. Many using HPT would run a MAF only tune - as the VE (or VVE - depending on your point of view) tables often overwhelm the less experienced tuner.

Also, your 2007 tune uses a Low and a High MAF table, in 2008 these were homogenized into a single table (my preference). When altering the 2007 MAF tables - make sure the highest column in the Low table (5800 Hz) has the same values as the lowest column in the High table (5800 Hz).

Thanks for you help

[oakley6575]

You need to hook the wideband up to HPT. That way you can log lambda error and tuning is soooo simple.

[BigMike42]

First things first get a wideband and make sure you can view it in hptuners. Dont do anything until you have that.

[awdhurst]

You are tuning a boosted ls2 and you don't know how to tune the ve/maf table?

Learn some basics before you blow that thing up! You should have a wideband that is logged against your VE and MAF tables so you can ensure the fueling is proper.

what would be a good gauge setup?

[awdhurst]

small adjustments

[Ben Charles]

Don't go WOT your PE table is not commanding enough fuel your around 13.3 AFR (nor is your MAF from what I can tell)

Your limited by the 512 G/sec limit too, going to have to have a scaled tune or the PE table is going to have to be modded. Since your a centri blower REALLY either would work, but one is the more professional way of doing it.

Tune needs a lot of work

EDIT: Looked at a pull you did, don't go WOT again your maxing out the MAF G/sec limit at 4400 and your shifting it 6000+ with a PE table commanding 13.0 AFR (you have stoich as 14.3).

[awdhurst]

testing the wb02. It shows up on the table display and the chart display. How do I get it to show up on the histogram chart? or is it not suppose to?

[Alain2]

You have to add it to the chart settings and histogram settings configuration.