91 k1500 SLOW build

[whittenetx]

Truck - 1991 K1500 RCSB
Engine - 5.3 out of a suburban
Transmission - 5LM60 or some version of NV3500 its been replaced and/or rebuilt so I'm not sure
Suspension - Belltech street performance shocks, drop shackles and torsion keys
Wheels & Tires - 285/70 17 Terra grapplers and newer oem GM wheels
ECU - Holley TerminatorX (wizard tune)
Exhaust- stock manifolds dual pipes running to a borla dual in/out resonator that is for a 2014ish 5.0 mustang. And at the back i have 2 universal borla s type mufflers.

Got the truck a few years ago bone stock step side with a rebuilt 350 and a wrecked/missing front clip. After getting a front clip from the wrecking yard. Then going through 2 engines i decided to swap it with a 5.3.
Future to do list/upgrades
Get a tune
Ac & cruise working
33" tires
Tonneau cover
Small single turbo
Paint

End goal is 6spd AWD but thats a dream at this point

And if anyone knows someone i need help finding someone who can do a very basic remote tune on a Holley TerminatorX or just someone who has a tune for a bone stock 5.3 manual trans not trying to get all the power just want it to run smooth without close loop comp randomly maxing out

 

[whittenetx]

More pics

 

[whittenetx]

& more

 

[Drunkcanuk]

That's a nice little project you have there. And sounds like a good build plan. But one VERY important question.....what happened to the stepside bed?????

 

[whittenetx]

That's a nice little project you have there. And sounds like a good build plan. But one VERY important question.....what happened to the stepside bed?????

Sold immediately, somebody drove a couple hours just to come get it

 

[0xDEADBEEF]

I have a turbo 5.3 (manual trans) run by the T-X. The wizard tune is not that bad. If you keep applying the learn table you will eventually dial in your fuel to what your engine wants. I set my AFR and timing to be pretty conservative under boost.

What problems are you having? The only problem I had at first was it would want to die when I pushed in the clutch and coasted to a stop. I fixed it by getting the IAC right.

 

[whittenetx]

Mainly full throttle itll go than cut out but when it picks back up it really feels good than it cuts out again its i guess what you would call stuttering its all happening in a matter of seconds and when i looked at my data log it says closed loop is maxing out on and off.

Is the AF targets something you would change on a wizard tune? And if so what would be ballpark something to put in for a stock motor? (I know nothing about tuning at all)

 

[whittenetx]

And by applying the learn table do you mean just let it do its thing? Also what would you suggest putting in for max closed loop comp + & - limits since it's stock on a wizard tune, I think its like 50 percent automatically

 

[0xDEADBEEF]

I haven't done the wizard in a while, but I'm pretty sure idle and wide open throttle AFR are some of the things it asks.

Here's an example target AFR table from a base cal that comes with the software:

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The ECU builds up a table of fuel corrections over time, you can merge those into the static table so it's starting from a better point. I think you need to use the actual software for that. It's free, but you have to buy a CAN bus to USB adapter cable and have a laptop or PC nearby. Once you go through a couple of cycles of learning/merging you can set it be more conservative on the compensation.

If it's cutting in and out, I think you have other problems. Are you running knock sensors?

 

[whittenetx]

No knock sensors and I've been on the software just not directly I've done it through the SD card.

I should let you know if I turn off closed loop comp it quits 100% but it has NO power.

How do you "merge" the table of corrections to the static table? Or what do you mean by that?

And thanks for the answers!