93 tune with 92 octane

[DanielNix]

I took my truck out this morning, took my sweeheart to her carpool, and the friggin thing would hardly run. I started it yesterday on the new program while it was warm, so it never got used to the tweaks from cold start up. Ideas?

Also, the new program I put in had to be messed with, advanced the timing 8 degrees from the Diablo tune, and advanced it 8 degrees from the custom tune I loaded. Seems these guys didn't do the tune as I requested. Do you know what the timing is set at from Diablo for these trucks?

[mikel]

Thats a lot of timing, are you trying to blow it up?

restore the backup then start over my friend....

[DanielNix]

I did start over, and it goes like crazy at this timing, 8 degrees advance from the Diablo tune. It could be in part from the cam? It started getting better at 5 degrees advance, and is killer at 8 degrees advance. Do you know what the timing is from Diablo? I am in need of figuring this thing out...

[mikel]

whoah...dint read your sig.

You need a custom tune my friend...

[DanielNix]

Yeah, I am working on that, I would take it to a guy locally, in Vancouver, WA, (I'm in the Portland, OR area, about 15 min away)but I am really broke right now. So, I am going through the guys I bought the programmer through, I know they do some killer stuff (they advertise that they do, who knows?) and they may have a program that can go with this build I have done. I don't think I will use the NOS anytime soon, I may even sell the setup. Regardless, I do appreciate your input, so please keep it coming.

[Mike_Levy]

You have the same cam as I do.

Mike, how much timing is in my tune? Its nowhere near what he's got I don't think.

[mikel]

Tough to tell from the tune exactly, a log will show commanded and actual.

FWIW, your 6.1 heads likely require a lot less timing than the 5.7 heads even with the same cam...

[Mike_Levy]

My Actual Spark Cyl 1 peaks at 34.50°..... or it did. Now something is screwing up and the motor is knocking most of the time, so advance is much, much lower. I think the ECU is trying to preserve the transmission or something, because as the tranny has gotten worse, so has the KR.

[mikel]

Wow, thats a lot of timing at WOT for your setup, surprised it liked that much...

[DanielNix]

Thanks for the post, I will see if it works for my application... The idle crap is driving me crazy, the surge is really bad. On the top end it goes really well still, but what a pain it is to get these on the money.

Thanks again.

[Mike_Levy]

My tune won't work for you. Won't even load. You'll need to have a tuner do something similar for your CalID. Shoot Johan a message. He does tunes fairly cheap.

[DanielNix]

Ooops, maybe not...

[ggaliano]

Thanks for the post, I will see if it works for my application... The idle crap is driving me crazy, the surge is really bad. On the top end it goes really well still, but what a pain it is to get these on the money.

Thanks again.

For the low idle and stalling, did you ever try cleaning the back side of your throttle plate? Some times when the throttle plate gets "coked up" it will disrupt air flow, and cause rough idle and stalling when slowing down from speed. Just a thought.

[DanielNix]

I appreciate the advice on the throttle plate cleaning, it has a new throttle body and is squeaky clean. I have also checked the vacuum hoses on it too. It is the tuning, I had a Superchips programmer on it, and it idled fine. Since you can't adjust any parameters with it, it threw the "running to rich" check engine code. It was still fast, just wayyy too rich. You could not only smell it, you could see the vapor on the startup, cold or hot.

[DanielNix]

Mike_Levy, what year and make is the tune file that you posted from? My guy is looking it over right now. Please advise asap.
Thank you very much. (thats what Elvis would say...)