can anyone help with tuning advise

[tom70]

i have a 6.0 with 243 heads, texas speed torque V2 cam, ls1 intake and 12554271 injectors, aftermarket throttle body. I think it's a 95 m.m. I'm usung a mosule with 12212156 OS. I can not get it to idle. i have to hole throttle about 1/8 way to let it idle. i checked checked throttle body on a scanner, it seems ok. any help on where i should start to make changes would be appriciated. or if there are any tutorials.

thanks

[MO LS Noobie]

Sorry, more questions than answers. Are you drive-by wire or drive-by cable? Drive-by cable requires an IAC on the throttlebody for idle speed control, whereas the drive by wire controls it by the computer. If we know the answers to these questions we can help

[tom70]

it is using dbc throttle body. do you want a copy of program file?

[Pulse_GTO]

Could you post a copy of your bin? Are those stock LS1 injectors? You could adjust the throttle body stop to hold the blade open. Just remember to disconnect the TPS, turn the key to on for 10 seconds, turn it back off, plug it back in, turn the key back on and clear the codes. This allows you to reset to "0%" position and stay in the idle tables. Other items that help idle:
- Add to the idle desired airflow table.
- Increase idle speed by 50-100 rpm.
- Increase idle timing 5-10 degrees.
- Make sure fuel is good.

[MO LS Noobie]

Yes, please post your bin file. Good suggestions from Pulse_GTO. If you have access to datastream it would be helpful to see your idle short and long-term fuel trims, and your IAC position/counts. Also TPS position/volts.

[tom70]

yes i have stock injectors. i know will probably have to change out but wanted to get engine running on test stand first. attached bin file.

[Pulse_GTO]

Since the engine is not in a car, are you using the MAF?

[tom70]

Yes. But my test harness was
Cut down to allow it sensor. I bought an adapter harness

[Pulse_GTO]

Since you said that the MAF is connected while the engine is on the test stand give the attached file a try. I made sure to include the LS1 injector data set up for a return style fuel system. I did my best guess with idle parameters, so who knows if it will even run.

[tom70]

Thank you very much. I will try when I get a chance

[tom70]

I have not return rail. I'm using a Corvette filter/regulator

[Pulse_GTO]

Here is a bin with the injectors set up for a returnless system.

[Thorwon]

Here is a bin with the injectors set up for a returnless system.

I don't want to hijack the thread, but what's the difference?

[tom70]

I don't want to hijack the thread, but what's the difference?
I don't know either. I'm just learning how to understand everything when it comes to tuning.

[Pulse_GTO]

The injector flow rate table is set up differently. In Tom70's application the fuel pressure can vary in regards to engine vacuum, so the table reflects that.

[tom70]

17998
My throttle body doesn't have an idle adjustment screw

[Thorwon]

17998
My throttle body doesn't have an idle adjustment screw

He's referring to the throttle stop screw. It's on the linkage side of the throttle body.

[tom70]

this does not have one. it should be on throttle body and adjust the linkage. on right side og picture.

[Pulse_GTO]

It's the little screw on the left side in this image.
17999

[tom70]

Sorry guys I overlooked it. It's definitely there. I'll adjust and install tune. Again sorry. I felt for it a few times

[Some Fool]

No hijack intended here, but my issue may be related? Do I need to adjust the same screw or the tune? Any help is greatly appreciated.
I have a junkyard 6.0L with 317 heads, stock cam, stock injectors, stock everything as far as I know but it will not idle once it is up to operating temperature.
It is fine cold and drives ok, but as soon as I come to a stop it will sputter and die ( have to hold part throttle while cranking to get it to restart )?
It is drive by cable with a 4L80e transmission and I am running a return style fuel system with a stock pump in the tank.
I will try to upload the bin, but new to all of this. 1800618005

[MO LS Noobie]

Some Fool: First you need to make sure your engine is mechanically sound and all wiring is correct. Have you tried all the previous suggestions? FPR leak, vacuum leak, etc? Probably not the throttle stop as it runs correctly cold. Has it ever idled correctly when warm? When warm and you hold the throttle open does it idle smooth, or like it is choking out, running rich? Does adding a bit of propane (add fuel) help? What operating system are you running?
If you are sure all the above is correct you can start over with a fresh .bin. http://www.gearhead-efi.com/Fuel-Injection/showthread.php?1513-2002-TunerPro-Bin-Files&highlight=12212156

[Some Fool]

MO LS Noobie. Excellent advice. In looking at the FPR there was a crack in the boot on the vacuum line. I will replace it an try again.
Thank you.

[MO LS Noobie]

Usually I see fuel inside of hose from a leaking diaphragm. Good find.


MO LS Noobie. Excellent advice. In looking at the FPR there was a crack in the boot on the vacuum line. I will replace it an try again.
Thank you.

[tom70]

Pulse_GTO thank you very much for bin file!!! Engine fires right up and idles great! Again thank you very much. Let me know if you ever have any lessons

[Pulse_GTO]

Pulse_GTO thank you very much for bin file!!! Engine fires right up and idles great! Again thank you very much. Let me know if you ever have any lessons

Glad I could help!