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okay cool so you are somewhat close there. there are a few things you are going to need to do in vcm scanner to log the correct pids in order to get the data you need to get it dialed in. I will PM...

same turbo I have on mine then. mine is the 1.25 ar backhousing. how does the truck startup currently? does it start and idle fine or is that problematic right now also?

what size turbo is on it? what brand wideband do you have? does it have a boost reference fuel pressure regulator or is it on stock rails? is it a stock 3 bolt intake and throttle body? those are a...

I have a turbo 5.3 4wd truck with an e1840p cam. Mine has ported heads and flat tops with 10.1:1 compression but will be similar to this one. I've been to 20psi on mine. I need some more info on your...

I see you said russk now that's ltit vs stit. That does work but only with stock throttle bodies in my experience. Dynamic is a better way to do it imo but if you have a stock TB then I've had decent...

Have you dialed in the maf curve or the ve with a wideband or narrowbands yet? That needs to be done before trying to dial in the braf. Are you doing the ltit+stit method? I prefer the dynamic...

Just wanted to make an update here my last post was incorrect. I had to read and do some testing of how the Iac works to find my problem but it is solved for real this time. so there is no way for an...

here it is. it is a scaled tune injectors are 88lb actual. its scaled for timing control in boost. it starts up now at any temp. this truck runs super hard for it being a 5.3 it has ported 706 heads...

I have solved this issue finally. I had to do some research at the shop myself to finally figure this out. But it was in the throttle body and iac. Don't believe all the iac counts stuff you see or...

Btw on the post above I meant open the TB when the counts where at 220-240

Any idea on what to try next? I have a new wideband sensor on the way currently just to rule that out but I don't think that's it.

Okay it wasn't that. I put a brand new gm tps and iac in it. The tps volts are at .31 and tps is 0% what is happening is I will get the engine completely up to temp (176-178 with current thermostat)...

Hi guys I was looking at two oem files for a 5.3 suburban today and couldnt help but notice a massive difference in the transient fueling tables. for instance Fuel boiling time vs coolant vs map on a...

Ended up being that my iac valve is from a 4.3 s10 the throw of the valve is different than the one on a 5.3 at 0 counts it's longer than an LS iac and at 310 counts it's barely opening in this...

well its better but still not fixed. i can do an iac counts vs effective area modification. (idle desired/dynamic airflow*iac counts) it never gets close just keeps saying its off no matter how many...

well I can finally say this issue has been solved. It was the adaptive idle settings jacking with the stit and ltit that was the final piece of the puzzle. The update rpm error was set to zero. I...

Got the new throttle body in a long with he other changes and it's fine. Just needs an raf adjustment to be fine tuned and it will be great.

So I did a few things that improved the startup drastically. 1 I took about 25% of the startup flare control out of it. 2. I quit listening to my wideband under 1000rpm (because I have a very minor...

my laptop charger broke and I just got my new one in today. I have a new throttle body that should be here today, so I can start with a fresh unmodified one, however I noticed that the startup was...

So my pretty sure the issue is the eBay throttle body. It worked on a previous setup but Ive modified and ported it to make it work. My friends turbo suburban I tuned worked fine with this same...

I may do this to keep it from bottoming out the idle trims I could force it to a minimum of 35-40 counts and ignition will still hold the idle. Timing can control the idle fairly well on this setup....

Laptop was almost dead but I was able to write those adjustments and I opened the Throttle blade some because it still wouldn't start with iac counts at 310 and commanded afrs are fine. it will start...

I'm going to try and remove a bunch of afterstart enrichment and cut back the startup airflow to stock setting plus 1 gram and see what happens. It's not commanding an overly rich afr. It has 56%...

I didn't scale the FA Mult stage 1 vs time though. I've never had to before on the p01 ecus but maybe so on this p59

I scaled the cranking ve the same as the primary ve. This setup went from 4.3 express van to 5.3 Tahoe flex segment 3 bar scaled in one write never ran it unscaled.