LQ9 - setup parameters - Bog/lull off idle
 

I have setup my (2004) LQ9 using the FAST EZ-LS, originally using most of the default settings in the setup wizard, but started to play a bit with the numbers to get it running better/stronger... Seems to pull hard through all the shifts and RPM range after I have a bit of movement and rpm built up. If I "punch" it from a stand still from idle, I seem to get a "bog" or lull until it climbs in rpm..... Its transplanted in a rock crawler/rock bouncer so that initial launch is key, and Im missing out...
Motor internals are stock, with headers/exhaust and a aftermarket cold air intake.... Th400

Some of the current values I have entered in are:

Fuel pressure : 58 psi
Injectors : 25lb
Timing idle : 22
All in timing : 32
All in timing rpm: 3000

AFR:
Idle - 13.1
Cruise- 14
WOT - 13

Just looking some some input on the numbers I have entered in??? Things to change or look for ???

Thanks!

Do that thing have any way to data log? Have you checked your TPS to make sure it is good, and does not have a bad spot? Do you have a wideband? If so, what does it do on the punch?

None of the parameters you listed suggest any way to control tip-in fueling. I'm going to go out on a limb and guess that such a simplistic tuning solution is probably geared toward stock 5.7l motors, and one of those "default settings" you mentioned may need more scrutiny.

No data log no, but it does show a live feed. I thought there seemed to be a bit of a "blip" in the TPS, so I installed a new on.... It made no difference.
There is a wideband 02 - but have not looked at the values. Will check it out!

Correct. I have started tweaking some values but in all honesty im playing a complete guessing game. Was hoping to have someone chime in on what to be looking for or even try.

Watch what the afr does when it bogs. Correct the rich or lean condition and it will probably go away.

A bar type graph is given for AFR. A "targeted AFR" and "Actual AFR". When I punch the throttle the actual AFR climbs past the actual AFR and tops out, then settles once the engine catches up. I have played within the full parameter range given on the "Accel Fuel" setting... doesnt seem to make a difference...

I run extremely shallow gearing and not much of an exhaust, so its confusing at times because I get lots of popping out the exhaust during de-acceleration... Leading me to believe its running too rich... but i dont think its the case.....

Check also the burst knock stuff since this is a truck
motor/PCM donor. Raise the delta g/cyl numbers at
least 2X from factory truck values, to keep from the
burst knock triggering on just about any throttle (or
even RPM run-up in 1st) transition.

I dont think I have seen that as a option to change within the FAST EZ LS module?

Did you try calling Fast? I wonder if your exhaust being to short is causing your wideband to read weird when you first put throttle into it.