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I've never seen roller rockers make power on a LSX.

I've consistently seen them cause setups to nose over far sooner than they should. Weight over the valve tip is always higher and causes...

How are you measuring HP?

That is likely the issue.

Humm... maybe the test could be done a little more scientific. In the video it looked like FP dropped a bit and that is what the raw sensor looked like to me. I didn't/don't look at delta pressure...

This doesn't look like a very good tune at all. I'm sorry to tell you that. The timing table is very rough.. Its commanded to go super rich at WOT.

In the log its going into PE all the time.....

Thanks for the heads up.. I looked an it looked like it the gauge followed what was in the scanner? I must have missed it. I've recorded the gauge face and HPTuners logginng at the same time with...

The 07 6 cylinder trailblazer uses a computer (P12) that from our understanding never ran electric fans. There is no pin out to run electric fans.

We sell a kit for 07 6 cylinder trailblazers...

There is only a 4% difference between the two. You could just blanket scale the VVE/MAF by 4% to make up for it when the flex sensors actually sees pump gas at E10.

But really 4% is inside a...

Try this..

To me looks all TM related.


Also, I'd expect for 140 F IAT's with that much boost.. That will put the timing back to 0 with the way your main spark/Iat tables are setup.

...

Really need to see a log. Try to get it to start and run even if its just for less than a min.

a decent portion of our customers say our initial tune is off.. when a IAT, MAP, etc is bad...

When converting to GM data from FORD you are doing a huge amount of extrapolating.

Here is a screenshot of our calculator doing this. The blue is the defined FORD data.. The red is...

Sometimes they just go bad. Have you tried a set of new GM knock sensors. Don't buy anything else.. Beware of counterfeits on amazon and ebay.

I assume you don't hear any knock audibly?

Do you have roller rockers on this? What type of rocker?

I agree that this mostly looks like valve springs.

I'll bet you have 20 rwhp in a good intake and a decent throttle body but that...

The fuel pressure looks reasonable on start up. This is a FPCM equipped truck so it has a sensor in the fuel line. I've never found them untrustworthy.

I would keep adding the to the starting...

You got to get the codes taken care of first. Just go to the service manual and follow the diag. If you have specific issues ask here and I'm sure someone can help.

This is very lean at WOT. ...

I've been doing this for 23 years now. But only GM.. Having said that.. if this was a ford. I wouldn't want to do it.. even though I've been a professional tuner since 2001.

There is no...

Some OS's do have a voltage multiplier.. not offset.

it's not how I would go about this.. I'd verify the things I said before.

It would be better at this point to start from a completely stock file. Some dumb change someone made at some point could cause a lot of headache down the road.

It's about impossible to just...

I've had LS2 and LS3's pick up 40 + rwhp from 87 to 93.

The cam and compression are not ideal for what you are trying to do. The easiest fix right now would be to run premium.

Can I take a life insurance policy out on this engine?


kidding..... sorta

It's not injector tip temperature..

Simple math. If you go to that correction table you'd have 0.1ms of offset

Injector DC for you at WOT is 11 ms so with that offset that would be 11.1ms ...

The timing is pretty lazy.. are you trying to run this on 87?

Yes.. negatively effects VE.. Only vaporized fuel burns.. All that extra fuel takes up even more extra volume.

side note/ nerd time... the change in charge temp after vaporization between the...

Did fuel pressure come back when you reset the code and restarted?

If they are working.. than great. I wouldn't bother.

There is a well known issue of aftermarket parts just being absolute trash now days. Whenever possible only buy GM parts. Lots of...

In both of those logs the o2's and fuel trims were working correctly