Anyone have a base tune for a LQ4 with a 224/230 .550 cam/ 48lb injectors???

I am seeing if something in my tune will not let it idle... Its got a 3000 stall converter. I am a novice to HP tuners and self tuning... someone please help.

Post your current tune and logs.

Provide more details about the engine setup. Like what injectors are they, brand.

Are you running a MAF still?

How is fuel pressure at the rail??

stock rebuild lq4 with btr stage 4 truck cam (gen 1) LS1 intake shorty headers, cats removed, rear 02s removed, stock 4l60e with 3000 stall and corvette servos. planning on running Nitrous.

58lbs at rail, 48lb/hr SVO green tops, and new fuel filter.

cant figure out how to post my tune and logs....

I also just upgraded the fuel pump to a 340lph quantum

Use the advanced reply, from there you can add attachments.

I am trying to do away with the MAF as I know this an aggressive cam (111 LSA) I am smelling a whole lot of fuel on cranking... TBH Ive never been more lost and feel dumb AF.

if your gonna do away with maf. you need to set dtc to mil on 1st error. adjust your fuel>flow rate vs kpa to your new injector data.
also a note when you get it running and start adjusting fueling you are gonna have to make changes to the secondary ve table then copy to main and interpolate. between every other row.

Should I adjust lower or higher based on the bigger injectors?

Sit back and think about what you just asked lol.

If you put in larger injectors, the number is of course going to be larger than it was before. If those injectors did not come with injector data for you to plug into the tune, you better find it because you'll be kinda lost without it. Or just sell them and get better injectors with known good data. Everything from injector flow rate, offset vs volts, short pulse adder, minimum injector pulse all have to be changed for the injectors. This is where data is key.

As said, you will have to set the MAF dtc's to MIL on first error for speed density. And you will have to understand how the stock operating system works in speed density with the primary and secondary VE tables.

Or you can upgrade the OS to the 2 bar OS upgrade in the OS tab, this would remove the secondary VE and give you a new primary VE with more cells that go all the way to 210kpa instead of 105kpa. This engine wouldn't use the portion above 105kpa but that doesn't matter because the stock VE can still be pasted back into the 0-105kpa section and worked on from there.

Thank you. These are some bullshit Amazon injectors... I swapped back in the LS1 stockers. I knew better, I should have just got some Deatschwerks. Do you think the stock LS 1 will support it until I can get the better ones?

I've been building restomods and full restos for about 15 years. I had no idea tuning was this complicated. I just want to get it running so I can limp it to a tuner

Yes, the stock injector will get you by if you just need to get it running. They just aren't going to be large enough once you got to full throttle tuning.

Quantity: 8 Fuel Injectors
Condition: 100% BRAND NEW
Design: Bosch GEN III EV1 Style Fuel Injector
O-Rings Included: Yes, preinstalled
Injector Design: Metal & composite plastic
Nozzle Design: 1 hole disc
Connector Type: EV1
Filter Design: Basket filter design at inlet
Spray Pattern: 15 Degree Spray Cone
Specification
Coil Resistance: 12 Ohms / High Impedance
Static Flow Rate: 42 lb/hr = 440 cc/min @ 43.5PSI ( 300kPa )
Gain: 0.12ms/MG
Offset: 0.055ms
Turn on time @ 14VDC: 1.14ms
Turn off time: 0.85ms @ 300KPa
Amperage: 1.0 Amps
Pressure: Min 30PSIG/ Max 100PSIG
Length: 3" (74mm)
O-Ring Diameter: 14.5mm

So I guess Amazon didnt let me down that bad...

That information is good an all but if there is no spreadsheet with the tables I talked about previously, they are kinda useless.

i would have got the injectors from a company like FIC who supplies the gm specific data to match their injectors.

I concur... any recommendations... So I swapped out my 42lbs to the stock ls1... still not getting any injector pulse. I can command the injectors on with 60lbs at the rail... and it will start for about 10 seconds. I have no injector pulse even though the VATS is disabled. I am so beyond lost.

Bad PCM?

Not a PCM problem.

It's going to be calibration related. Post the most recent tune file with the changes you've made.