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Topic Review (Newest First)
03-15-2020 05:35 PM
longhorn84
Quote:
Originally Posted by crmarshall View Post
From what I understand, the fuel pressure sensor has to know the fuel tank level. Is this correct and if so, how did you tie into the fuel gauge?
No, the fuel tank pressure sensor is only to test the evap system, it doesn't wire to the fuel gauge.
03-15-2020 09:58 AM
gt1guy
Quote:
Originally Posted by bkh98 View Post
Your have nothing to worry about.
My cables run about 6" from mine with no issue.
That's great. Thanks
03-14-2020 06:01 PM
bkh98 Your have nothing to worry about.
My cables run about 6" from mine with no issue.
03-14-2020 02:10 PM
crmarshall
Quote:
Originally Posted by rcherb View Post
Tank pressure sensor I have done two things, drilled a hole in the top of the tank, put the sensor in and sealed it with a product called "Seal All", That was with the Stock TJ tank, I just switched to the genright tank and drilled a hole and put it in the top part of the fuel sender assembly. Both have worked fine. As far as the emissions go, you have to run all 4 O2 sensors with a cat, and then use all of the GM evap stuff. Plumb it all correctly and it will pass. I just had mine done through MD emissions which is a plug into the ECM while its running.
From what I understand, the fuel pressure sensor has to know the fuel tank level. Is this correct and if so, how did you tie into the fuel gauge?
03-11-2020 10:20 AM
gt1guy How far do I need to keep battery cables away from the ECU(E38)?

I have dual batteries in the rear of the Jeep. One for the engine, one for the chassis wiring. Both batteries run to a switch in the dash, then to the winch in front. I've tapped into the engine battery cable just before the switch for power to the starter. The ECU is inside the tub on the firewall.

As it sits right now, no battery cable is closer than a foot from the ECU. The switch is almost 2' away and the cables running to the winch go away from the ECU after the switch.

Do I need to worry about this?
03-10-2020 08:37 PM
Alexia
Quote:
Originally Posted by longhorn84 View Post
By the way, do you actually need the brake pedal position sensor?
Only if you are running the BCM and need the BCM to control functions that happen when the brake is pressed.(Shift interlock, cruise control cancel, brake lights.)
03-04-2020 08:18 AM
longhorn84
Quote:
Originally Posted by Alexia View Post
I am actually leaving that shop behind! I just moved.

I have done 5,000 miles without trouble or a break down.(Other than running out of gas.) I kept the rear D44 with ARB locker and put in upgraded axle shafts. It has held up to me launching it on the street. The transfer case internals were upgraded as well.

I am working on the GMLAN CAN to Chrysler PCI code right now to keep my stock instrument cluster. https://twitter.com/Azxiana/status/1...893448/photo/1
By the way, do you actually need the brake pedal position sensor?
02-29-2020 10:04 PM
Scooby3693 I tried the tachometer trick on a 99 TJ.
2001 GMC 6.0L.
Seems to work perfectly.
I used HP Tuners to change the tach output. I didn't see any "pull-up/no pull-up" option.
Just changed the high and low resolution to 1. Spliced the 3 wires together as directed.....bingo!
Very thankful to the original author. All my factory guages work.
02-18-2020 07:28 PM
motorsports3
Quote:
Originally Posted by Jeepin4fun View Post
Has anyone tried this? Does it really work?
It didnt work for me. My GM ecu does not allow to turn the pullup off, some of the later models do. Thats the only difference between mine and that guys, but no one else seems to have confirmed it works either
02-14-2020 11:30 PM
waxy Fuel system LS conversion. I looked around and I saw what was available for my jeep and LS conversion and none I was that happy with. I have a company that makes a lot of parts and I decided to contact my suppliers and see if i could sort something out. I asked them to make a replacement regulator as on top of the tj fuel tank that is 4bar not 3.5 bar (56 psi not 49 psi for you backward people haha) anyway they came back with yes we can do some but you must buy 100 so Im ordering them now. This is simple as dropping your tank pulling out the old reg and pushing the new one on. I have listed them on my site and when they are gone its all over. The Price is $80 and that includes world wide shipping.
https://www.waxracingproducts.com/pr...fuel-regulator
01-13-2020 10:02 AM
Alexia
Quote:
Originally Posted by longhorn84 View Post
Good one, that's a gen 4 and you have a legit garage and some intense fabbing skills! Hows it holding up? Did you change the rear end?
I am actually leaving that shop behind! I just moved.

I have done 5,000 miles without trouble or a break down.(Other than running out of gas.) I kept the rear D44 with ARB locker and put in upgraded axle shafts. It has held up to me launching it on the street. The transfer case internals were upgraded as well.

I am working on the GMLAN CAN to Chrysler PCI code right now to keep my stock instrument cluster. https://twitter.com/Azxiana/status/1...893448/photo/1
01-12-2020 10:11 AM
longhorn84 Good one, that's a gen 4 and you have a legit garage and some intense fabbing skills! Hows it holding up? Did you change the rear end?
01-11-2020 11:17 AM
Alexia
Quote:
Originally Posted by longhorn84 View Post
I'm looking to make a comprehensive guide to doing an LS swap into a TJ. I'm compiling all the videos and threads that have helped me plan my swap. My goal is to list them below and then later make a full doc with links to each video. Are there others out there that you know of that I don't have on my list?

bobwilson84, putting LS into YJ
ucandoit2 - putting LS into CJ
joester1908 - Put LS into TJ
Serama555 - putting LS into TJ
BSKGarage - putting LS into TJ
TheAsapAutomotiveChannel - putting LS into TJ
Dirona - Put 5.2 into TJ
MontanaLowGear - Put 5.9 into TJ
SpeedBump - Put LS into YJ
JustinMelton - Put 5.2 into TJ
zmotosports - Put LS into JK
WorknDirt - Put Hemi in LJ
Alexia - Put L99/6L80E into LJ - https://comancheclub.com/topic/56419...6l80-in-my-lj/
01-08-2020 03:54 PM
larrylong
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01-08-2020 01:40 PM
longhorn84 I'm looking to make a comprehensive guide to doing an LS swap into a TJ. I'm compiling all the videos and threads that have helped me plan my swap. My goal is to list them below and then later make a full doc with links to each video. Are there others out there that you know of that I don't have on my list?

bobwilson84, putting LS into YJ
ucandoit2 - putting LS into CJ
joester1908 - Put LS into TJ
Serama555 - putting LS into TJ
BSKGarage - putting LS into TJ
TheAsapAutomotiveChannel - putting LS into TJ
Dirona - Put 5.2 into TJ
MontanaLowGear - Put 5.9 into TJ
SpeedBump - Put LS into YJ
JustinMelton - Put 5.2 into TJ
zmotosports - Put LS into JK
WorknDirt - Put Hemi in LJ
12-21-2019 07:16 PM
ultimate fighter
Quote:
Originally Posted by fredycruger View Post
nice UF you got it done
just needed to say "no" to rescuing other people from their own shit...

Hopefully buttoning up body harness and interior, axle swaps and 3 link. I need a wheeling trip soon
12-21-2019 08:42 AM
Jeepin4fun
Quote:
Originally Posted by motorsports3 View Post
Yeah that’s all what I’ve heard /Thought, but this is what he is saying you have to do:


“TACHOMETER:

And now for the info you came here for. First off, I cannot take full credit for this. Greg Byars was kind enough bounce a few messages back and forth with me with research he did, and in the end, it was a $0 working setup😁

First and foremost, you will need access to tuning software to make adjustments to your Tach Output settings on your GM ECM. What you need to change in you tach output settings (see photos) is the HIgh and Low resolutions. Some ECM's will have a "Pullup" or "No Pullup" Type option in addition to the Resolution. Set the Type (if applies) to "No Pullup", set you High Resolution to "1" and your Low Resolution to "1" (see photos). Flash this back to the ECM.

Next, you will need to locate your Tach Output wire on your GM ECM, it is a solid white wire on pin 10. (99-02 ECM tach wire is on the RED connector while 03-07 is on the GREEN connector. This applies to the 4.8/5.3/6.0 engines)

Then, on the BLACK connector on your Jeep ECM, you want to locate pin 8 (CRANKSHAFT POSITION SENSOR SIGNAL). This is a GRAY wire with a BLACK STRIPE.

Then locate pin 18 (CMP SIGNAL). This is a TAN wire with a YELLOW STRIPE.

This is where things get stupid simple. Simply take Pins 8 and 18 of the Jeep ECM and connect them directly to pin 10 in the GM ECM. Congratulations, you now have a working Tachometer without the need for expensive converters / emulator boxes.

(Drops Mic) 🎤”
Has anyone tried this? Does it really work?
12-09-2019 07:46 AM
Marty, SoCal
Quote:
Originally Posted by Scrammbledeggs View Post
start off by saying I did the 5.3/4l60e swap into a 1981 cj8,put all the emissions parts in cats,o2 sensors,charcoal canister, purge valve,tank pressure sensor,check engine lite,sent the harness and computer to wayne,have driven it about 500 miles now with no cel so far.The jeep had the 151 in it before the swap,now with the v8 its a lot of fun.So now I take it to the referee to get the blessing and he askswhat I did to it before hooking it up to his computer,so I tell him I got the donor parts from a 2005 Tahoe and he stops me rite there and says I couldn't do the swap because the Tahoe is considered a medium duty machine and the scrambler is a light duty machine(wtf).If anybody has any ideas please help I don't want to just give up on this project,to much time and money to just forget it. All ears
In Commiefornia, the donor engine must be from the same weight class vehicle as the jeep, meaning that in the case of the CJ, you must get the donor engine and all wiring and smog accessories from a light duty vehicle with a gross weight of 6000lbs or lower. The emissions label will say "Light Duty Truck". Not sure what the GVWR is on a Tahoe. You must find a stock, unmodified PCM with a GM VIN from a light duty truck, California emissions certified if your CJ originally was sold with CA emissions. Maybe from a 5.3l Trailblazer or H3 Hummer? The only thing you can modify on the PCM is anti-theft if it had it.

All the rules are on the BAR's website, in the 2019 Smog Check Reference guide, Appendix D, on page 45:
https://smogcheck.ca.gov/pdf/Smog_Ch...ence_Guide.pdf
12-09-2019 06:54 AM
fredycruger
Quote:
Originally Posted by ultimate fighter View Post

nice UF you got it done
12-09-2019 04:49 AM
AHenry014 Here is my experience. I asked Wayne about changing the VIN in the GM PCM and he said he can only change it to another compatible GM vin, not the jeep vin. Mine comes up as an 05 silverado i believe. When i took it in for emissions, i told them it was swapped and would pull a GM vin when plugged in. All they did was change the engine size spec for my Jeep vin within the CT emissions system, so it will forever be 5.3 liters. It was a fairly painless experience, just ensure you are otherwise emissions legal for your area. They nearly failed me for a non-op check engine light, but i relocated it to the knee panel. It happens to be fairly obscured by the wiper stalk, which is why they missed it.

Reading back to your post, i am astonished that they are trying to plug the thing in at all. Its pre-obd2, so it should be rolled and sniffed. You would pass with flying colors with all the modern equipment. Maybe find another spot and not tell them? You could get the cj8 with a v8 right? If they really care, tell them its an EFI modified 304/360. No one will be the wiser.
12-07-2019 05:23 AM
cj7ole Ask Wayne, he has probably been there before. Must be something in the ECU that id's the donor, maybe that can be part of the flash? BTH mine was from an '07 Tahoe, he did the ecu and harness in 2011. Sure glad I don't live in Kalifornia. I like JayMcJay's approach.
12-06-2019 08:47 PM
Scrammbledeggs If he hooks up to me then I’m locked into Sacramento then they got me,
12-06-2019 06:15 PM
ultimate fighter
12-06-2019 12:51 PM
JayMcJay
Quote:
Originally Posted by Scrammbledeggs View Post
So when he hooks up to it with his machine Whats going to tell him itís from
I dunno. I'm just thinking that if he failed you based strictly on your story and not data, tell him a different story.
So that you're not lying, I'll tell you it came from a 2005 Camaro.
Hey, it came from a 2005 Camaro.
Now you can say 'I was told it's from a 2005 Camaro'

If it turns out that once he connects up to it he is able to tell you that it's from a Tahoe somehow you'll stand corrected. you can then say 'huh. weird. I was told it was from a 2005 Camaro. I'll have to look into that'.
12-06-2019 12:45 PM
Scrammbledeggs So when he hooks up to it with his machine Whats going to tell him it’s from
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