Turbod 6.2

[SMiGGS]

Hey yall, came here as my last hope, maybe someone can help me with my pick up.

Specs:
6.2L l9h 78mm Turbo 5psi
60# Injectors
340LPH Fuel Pump
PMAS MAF
genIV E38


Issue:
Had my truck up and running good after the turbo install and dyno tune. Well replaced my trans and Fuel control module. Had my buddy over at gm, program the fuel module, and accidentally flashed my tune with the stock file.

I purchased HPtuners, and ive been reading for the past couple of months before the big purchase. I tuned and got some practice on my other pick-up truck and cammed camaro, but dont consider myself fluent or a tuner.

For some reason, my truck just will not start. I turn the key itll crank and maybe turn on & itll immediately die, i unplugged the MAF and it actually turned on for a few seconds longer. I get a raw gasoline smell when im cranking too. I have a tech 2 and diagnosed all the modules. Checks plugs/packs/wires ect. Im about to give up on it, and i really dont want to.

Does some one have an open loop tune close to my specs that I can flash over, to make sure its not a mechanical/sensor issue, and perhaps just a tuning issue.

I can pay for your time, i dont mind, i would like to get this fixed before im off for deployment, and maybe even get a decent tune in it.

-Thank You

[5FDP]

Has the other correct data been put into the tune?

Like the MAF, the 2 bar map sensor, the new fuel injector size etc etc.

Have you disabled the VATS system to make sure that isn't a issue?

Post the tune and logs of you trying to get it running.

[SMiGGS]

I adjusted some fuel parameters, as far as the injector size, but i feel like i completely did everything wrong. Im not too sure if i want to even pull it out of my drive way. I havent been able to fill in the data, since im just trying to get it to start first. Once i can get it to start and idle, i can move on to the next part.

I just did two logs, one was just a start up, and the second one was a start up with some throttle.
First startup.hpl
Second Startup With some throttle.hpl
2011 62 Silverado MB1.hpt

thank you in advance, appreciate the help.

[5FDP]

I don't think that MAF sensor is calibrated right, it seems to read way way high even just at minimal revs. A stock MAF would actually work better and has a very high air flow capability. Kind of a waste of money really, you can extend the range of the stock maf by sticking it in a larger intake tube if you needed too but at 5psi you'll never max it out.

Also you have no o2 sensor function at all.

[SMiGGS]

I would like to do maf only that's why I had the o2 disabled, at least until I relocate the o2 pre turbo and not on the down pipe.

Is there a way to adjust the MAF? I mean it was working good before I lost my tune. Maybe I'm missing something. Also does my fueling look correct? Also did I set up the open loop correctly?

Sorry just learning through trial and error thank you for the help !!

[GHuggins]

Stupid question, but do you know who did the original tune? Perhaps they have it on file? I would be willing to bet the original tune was a SD tune - not many people out there bother with MAF tunes with turbo's - not even the OE does it much anymore due to their side problems...

[SMiGGS]

Stupid question, but do you know who did the original tune? Perhaps they have it on file? I would be willing to bet the original tune was a SD tune - not many people out there bother with MAF tunes with turbo's - not even the OE does it much anymore due to their side problems...

I live about 4 hours away of the tuning location, and ive tried to contact the fellas there, but no reply.

When i was there the tuner said that these trucks dont like or run well on SD. I asked why, and gave me the whole altitude and oem design explanation. I had bought a 2 bar map, when i made the drive up there, tuner didnt tune my truck until i bought an aftermarket maf.

[GHuggins]

The custom operating system fixes all of that if you have one available and besides you need to dial in the VE for transient fueling anyway.

[shortshifted]

Silly question, but did the theft relearn get completed ? Because the start/stall sounds alot like td interruption.

[shortshifted]

silly question, but did the theft relearn get completed ? Because the start/stall sounds alot like td interruption.

nvm i am an idiot, that body style is a no crank with a theft fail.

[SMiGGS]

The custom operating system fixes all of that if you have one available and besides you need to dial in the VE for transient fueling anyway.

Yeah definitely need to dial in the VE. Just as soon as I can get this thing started using.

[SMiGGS]

It was a good suggestion! Yes it's a 11 Silverado. My apologies I should e stated that.

[SMiGGS]

Got it up and running, but idle is horrible!

I have somewhat of a newb hurdle, and that is adjusting the tune for the 60# Siemens injectors and aftermarket maf.

I purchased a mowton ERM Performance tutorial, and was extremely helpful, but I was looking for a step-by-step procedure on how to adjust my tune for the injectors(proper spreadsheet), and as well as for the high-flow MAF. I used an ls1tuning forum spreadsheet I had found but im not too sure if its outdated. I had to adjust differential pressure by 4 for each cell to match my e38s differential pressure chart. After Adjusting IFR is there anything else I have to adjust for as well.

Would greatly appreciate the help.

[SultanHassanMasTuning]

check your PM

[ke5gnz]

let me know if you have got it started and running I have a setup that is very close to yours .