Right. Good thinking! The company that reworked my harness made it to a single ground.

 

What year wrangler???

 

98.

On 35s with a Ford 8.8 in the back. Some times I wish I had put a manual in instead of the build 4l60e just so I could chirp the tires in 2nd. Lol

 

I also have a LS6/4L60E 98 Wrangler. Great swap. Also have an 8.8 rear end out of a Explorer. Zero issues. 241 TC out a Rubicon. Did the swap about 12-13 years ago. It's been bullet proof. I plow my drive with it in the winter. Mall crawler in the summer time.

 

That looks great my man!

 

Does anyone have pcm pinouts of the 05 GMC Sierra and the 06 Silverado. Both with 5.3 engines.

I'd like to verify the pin outs are the same between the two.

Also if anyone has a compatibility table between pcms and gas pedals?

The gas pedal, PCM, TCM, and throttle body are from the 06 Silverado.

harness from the 05 sierra. If the pinouts don't match, I'd like to get an 05 pcm, but am unsure if the computer will work with the other components

 

LS swap guru looked at it. Told me I'm out of gas.

I know that wasn't the problem the entire time but if I fill it up and it runs, I'll be damned.

 

Nobody has done that... LOL On my YJ you don't want to get below 1/4 tank and depend on the gage, its a bit erratic on that last couple 3 to 4 gallons..
Been that way since new.. and two different sending units.

Another thing, don't know if the TJ tank does it, but my tank shrunk with age, its the black plastic one,
It shrunk enough to push on the bottom of the fuel pump and block the pickup..
I took the pump/sender module out and shortened the tube holding the pump by 1/4 inch.
If the tank was full the weight of the fuel would flatten the bottom of the tank out, but somewhere below
1/3 of a tank especially in hot weather it would lift and interrupt the fuel flow randomly.
Skid plate was hiding the problem. Also dirt buildup on the skid plate can migrate under the tank and cause the problem as well.

 

Your pickup might be too far off the bottom of the tank. It happens....

 

FWIW, the YJ Wrangler tanks has a 1" or so plastic bucket that the pump assembly sits in,
The pump inlet sits in a sort of "socket" that I think is to keep the pump from stressing the down tube,
Trick is if you push up on the area under it the socket sort of folds the filter socket upward and thats when it blocks the inlet.
This drove me crazy for about a month.. relays/pump/tracing wires..
Finally stuck my bore scope in the tank and pushed on the tank with a jack..
Oh and when I modified the pickup to lift the pump, I also shortened the return tube and drilled a 1/8 hole in it about half way up ,,
when the tank pushed up it also blocked the return and spiked the fuel pressure..

Sorry fixed this about 5 years ago, just remembered the details.

 

Glad you got figured out. One thing I am a little bit careful with is keeping gas tank above 1/4 full. The 98 tank has a small sump that the fuel pump sock sits in but when I did my swap I thought I looked in the tank when the fuel pump was out and there isn't any kind of baffling in the tank.

 

Yep, the inside of the tj tank is empty as can be.

Some tjs came with 15 gallon tanks, but they are the same tank. The filler tube extends lower in the tank so that you click the gas pump when there's 15 gallons versus 19.

I haven't filled it with gas yet. Going get gas now and we will see. Lol

 

Yep same as the YJ.. Mine will take 22 from bone dry with the tube shortened.

 

One more note. Don't know if you will be driving on snow or ice with your LS swapped Wrangler but it can be a bit of a handful unless you have it in 4 wheel drive. The back end will come around really quick if you aren't careful in two wheel drive.
But if you have some place to do it safely on the snow its a blast to do donuts forever.

 

I currently live in south Louisiana where it's snowed maybe 5 times in the last 20 years. And by snow I mean .5 inches. Lol.

I can imagine it though!

 

she lives!

Took a few minutes of cranking to get the air out of the lines. But ran as smooth as butter.

If the crank for a while until it runs thing continues, I'll do some diagnostics with the fuel setup. But it runs!

 

So what was it, just out of gas???

Congrats man.

 

Not enough fuel in the tank. Who would've guessed it..LOL

 

😳 oof

 

Yep, I had only origionally out two gallons in. And by time I got the fuel line purged of air and ran it a couple times, it was sucking air and gas.

Now like I said, it took probably 5 minutes of on and off cranking to get it to finally sustain an idle so there could still be a fuel problem, but it ran a HELL of a lot smoother this go round than the first time.

I was overlooking the simple ****.

Here's a video of me trying to crank it before it actually started.

Maybe this will give me some answers as to why it was doing that. Also, watch the passenger side bank spit fire at one point.