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Had a Chopacabra cam installed in our 5.3 2006 Silverado 4wd, tuned by local pro. The low end is really lacking. If the tuner adds in some timing, it has some more grunt but ends up pinging so had to...

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Latest project has 0411 PCM out of a truck and a 4l60E. I've noticed that the TCC will unlock any time I let off the throttle. But I have other 0411/4l60e combos that don't do this and would like the...

I am running a PCV on the passenger side from intake behind the throttle body down to the valley cover. Though it didn't occur to me that I could maybe get a little more air flow there if maybe using...

Drilling the TB has been hashed out a lot I know... and there's good amount of info regarding the IAC port not being adequate on a lot of aftermarket throttle bodies. After reading up and discussing...

Thanks - dumb question perhaps.... What the reason for doing it this way if they also did the 3 bar OS?

Whats up with this tune that the tuner set stoich to 24.23? Its a turbo 6.0, no blow off valve or intercooler. Also... seeing 84kpa at idle and what would seem like low idle timing?

I've read...

Can anyone see anything in this tune that would result in commanded AFR on a warmed up engine being 13.6? I'm expecting to see 14.7. This tune is currently setup to run maf only while I tune it a...

Solved I think. Everything was checking out with the relays and pin 17/pin18 and 43. I removed the AC relay and cut power to the vintage air... STILL the fans would run all the time. Finally I...

Using the 3 wire sensor. Will try that. Going to also see if I'm getting 12v in on the AC request pin.. my thinking there is maybe I have a relay wired wrong and pcm is getting an AC request, turning...

LS swap using reworked harness. O411 PCM out of 2002 yukon with a 5.3. The issue is when the engine starts, both cooling fans run immediately and don't shut off. Fan on/off temps are correctly set...

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Here's what I'm working with now. Only issue I have left is a bit of a dip in RPM as I coast to a stop but a little play with the cracker and or follower and I'll be set. I can't believe what...

Just wanted to make a note for anyone looking for answers... I have a 2000 LS1 in my 69 Camaro thats been completely rebuilt, TSP heads/cam/headers - the usual stuff. No matter what I tried I could...

yeehaw. Just changed the system option for the ECT to 0 and wrote the cal. I have TPS% now in the scanner. On to the next hurdle. Thx for a point in the right direction.

Maybe just change the platform type to f-body?

Ahhh ok. So I'm a little green on this.. only tuned some 2001 LS1s before. What do I need to do in the pcm to properly convert to DBC? thx

This setup is drive by cable. The original intake had a drive by cable throttle body and I have what I thought was the original PCM. Do you see otherwise in the file? I've tried all the channels for...

6.0LS from 2001 Sierra 0411 red/blue PCM. stock truck file with 2 bar speed density modification, otherwise stock at this point. When I use the scanner to read TPS volts I see .47 closed and 4.49...

Two scenarios I'm trying to work out.
1. When I start the engine cold, the idle surges up and down a 150-200 rpm for about 30-60 seconds.
2. sometimes when I blip the throttle while going about...

Can you guys comment on if I'm understanding these two tables correctly for Gen3? They are stock for 2002 LS1 Camaro.

with the delay vs o2 error, once the o2 reading is about 250mv past the switch...

Just noticed that. Thought I hit that table with your magic but guess not. Will do.

I seem to have a shark tooth pattern with my o2 switching. They reach 800mv or 150mv and then ramp back the other way very quickly. I just tried bumping the integrator delay by 35% in a couple of the...

tune files
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GH, if you want to/have time can you take a peek at these logs and maybe let me know what direction to go in from here?
v42: basically stock closed loop/o2 settings with small tweaks except to the...

The thing I'm having a trouble wrapping my head around is how adjusting the tables other than the switchpoint values gets your o2s to agree with the wideband if at 14.7 your o2s are reading say...