Idle Tuning How-To & Guide (w/pictures)

[Boost]

Thank you so much Frost!!!!

[MrGuy]

Would this also apply to a head and cam swap? What changes would be different if any? I put 706 heads on a 6.0 and also added a BTR stage 2 v2 cam.

I understand that a cam would need less fuel but I'm offsetting that with more compression, right?

[jpliss]

OK so maybe someone can help me with this.

I have a 5.3 retrofitted in a 56 nomad.

Injectors are DW 18U-01-0042-8 42 LBS injectors.

It has a comp cams Muther Thumper cam in it. ( NOt my doing )

I have tuned cams before and never had this much of an issue.

I cant even get this thing ti fire and idle at all.

I seem to only be getting 4 cylinders to fire and it is pig rich when trying to run.

When I open the throttle to 10% or 100% this thing will not even run at all.

Since I was having an issue I thought ill go back to basics and read any docs I can. What brought me to hear.

I followed the guide but this thing wont staty running. It fires like on 4 cylinders but no go.

I have verified all cylinders coils are firing and engine has compression.

Im lost on this one, even willing to pay for some help here.

I currently have no MAF installed either so it does not get in the way.




Attached are the tune and the cranking scan.

[NotSure]

OK so maybe someone can help me with this.
I have a 5.3 retrofitted in a 56 nomad.
I currently have no MAF installed either so it does not get in the way.
Attached are the tune and the cranking scan.

Doesn't look like you have the MAF failed.

[keithmcw]

Perhaps someone could take a look at my logs and offer any advice. I was having starting issues before I went through this process, It helped a ton!! However I still seem to have an issue where the vehicle hunts for rpm when shifting into gear. eventually it settles as long as I don't try to move. Any ideas where I went wrong?

Build: 2001 S10, forged LQ4 bottom end, 243 heads, TBSS intake, 90mm sniper, 50# injectors, BTR stage 2 cam 227/235, 2800 stall converter with a 4l60

[cobaltssoverbooster]

Updated the link in Post #113. Google drive updated security policies and the original link broke.

[Onomoto]

This is the process for a DBW correct. Lots of great info in this thread. I am soaking it up like a sponge.

[Paulster2]

This is the process for a DBW correct. Lots of great info in this thread. I am soaking it up like a sponge.

I haven't completely read the whole thread, but it appears the original intent of this was for a DBC, not DBW throttle body. At least that's what is posted up front by the OP.

[bk2life]

This is the process for a DBW correct.

I haven't completely read the whole thread, but it appears the original intent of this was for a DBC

DBW mostly, but there is some DBC info

[IROCMac]

Did you ever figure this out. i am stuck at the same part...

[ThePlayfulOne]

This is EXCITING SH#@! You've got me rubbing my legs like a cricket (still in box MPVI3). Thank you for the detailed how-to.. the absolute best I've ever seen (on a forum).