My kid wanted a Jeep, she's getting a 77 FJ40 LS Swap instead

[JKIII FJ40]

Just my 2 cents, I have a 2001 6.0, using stock radiator, mechanical stock clutch fan, and a shroud we modified a bit, runs 195. IMO lose the electric and aluminum.

No worries. My stock radiator was toast and I have had good luck with an aluminum radiator on my other 40. Unfortunately when I placed the motor I didnt leave enough room for a mechanical fan. Luckily the redux fan install was a success and my temps are doing a lot better. Sitting in the garage idling for almost an hour the highest it got was 217. Once I reaved it up it dropped 10+ degrees. I still might have some air in the system. I will use a mech fan on the next build.

 

[Augustiron]

5.3
Stock lm7 mechanical clutch fan
Champion LS swap fj40 radiator (My stock one wasn't great when pulled)
Relocated the radiator/radiator support down and over to center the fan better and get the lower hose to clear the fan
Using the stock 2F shroud with minor modifications. (Opened up the diameter of the hole for the bigger fan, added a small lip to get it to cover half the fan, also sectioned it horizontally into two pieces for easy removal in the future.

 

[TOYJOETA]

5.3
Stock lm7 mechanical clutch fan
Champion LS swap fj40 radiator (My stock one wasn't great when pulled)
Relocated the radiator/radiator support down and over to center the fan better and get the lower hose to clear the fan
Using the stock 2F shroud with minor modifications. (Opened up the diameter of the hole for the bigger fan, added a small lip to get it to cover half the fan, also sectioned it horizontally into two pieces for easy removal in the future.

Do you happen to have any pics of your radiator mounts? Sorry for the hijack.

 

[JKIII FJ40]

Took the truck for a drive the other day, almost had a coronary as the temp gauge was reading 240ish. Pulled the heater nob on and got it down to 215. When I got home, I hooked it up to my scan tool and checked the engine temps. The DD gauge is off by 20 degrees or more. Idling in the garage, the highest it got was 217. No signs of over heating and it ran well.

Today I let the kid drive while I was in the back, totally different experience. Kept cautioning her to take the turns slower as she was used to the 4Runner, of course being in the back is much more realistic as you are on fold down seats (BTW, glad I used the 4plus brackets as my fat ass would’ve collapsed the seat). She did take the turns slower after a while of constant badgering.
While at the in-laws the check engine light came on again, crap x2. Thought I fixed the issue but obviously not. Disconnected the battery and was checking the brake booster hose when I turned my head and saw the MAP sensor (light bulb moment). The retention clip was broke on one side, and the MAP sensor was loose. Broke out my new tool bag and zip tied the sensor. Seemed fine the rest of the trip and running around.

 

[JKIII FJ40]

MAF madness. I have been chasing my tail for the last couple of weeks with MAF issues. I had a MAF warp and cause a vacuum leak, I decided to put the correct MAF for the year of the motor. I thought it would be a simple wire swap, well it turned out to be nothing even remotely simple.
I am beginning to think I live under a dark cloud...LOL. I searched the internet for 2006, 2007, 2008, 2010 various MAF pin outs and have tried them all. I reached out to BP, I bet they cringe when they see an email from me. They suggested a pin out but that didn't work either. I tested the MAF and I don't believe I have any circuit issues. I have two different multimeters and have checked voltage and resistance. The tan wire measures out a 5.09v, the pink wire at 12.3, and the yellow at 5.09v as well. The center wire (black and I believe is ECM ground showed a 2-2.6k ohms and the IAT sensor ground was 3.6k ohms. I jumped out the IAT signal and ground and got it to register on my scan tool for IAT temp so I dont think its an ECM circuit issue. I checked the plug from the wiring harness and its a GT 150 that was used in 2007, the jumper harness I have been playing around with is for the later 5 pin MAF's. I am using a 2008 MAF, in my trial and error I am able to get it down to either a P0113 code or a P0102 code so I dont think its a vacuum leak elsewhere. Along the way I unplugged the battery for an hour to reset and nothing changed with the codes I got. I am able to get multiple P0102's in various wire combos. I dont believe there are any more possible combinations of pinouts I can try. I believe my only next step is to install the 2006-2007 Vortec MAF so I can eliminate the jumper harness and hopefully the ECM will recognize it. Any advice or direction you can offer would be greatly appreciated. I also appreciate you entertaining my numerous questions. Here is a copy of every MAF pinout I have tried:

MAF wiring

E

D

C

B

A

Codes

E

D

C

B

A

Codes

BL

T

B

Y

P

P0102, P0113

P

Y

BL

T

B

P0102

BL

T

B

P

Y

P0113

2007-2008 vortec BP

Y

P

BL

T

B

P0102

BL

T

P

B

Y

P0102, P0113

2007 vortec

B

T

BL

P

Y

P0113

BL

T

P

Y

B

P0102, P0113

P

BL

Y

T

B

P0102

BL

T

Y

P

B

P0102, P0113

BL

T

Y

B

P

P0102, P0113

BL

IAT ground

T

BL

B

P

Y

P0113, P0116

2007 avalanche

T

IAT sensor 5v

T

BL

B

Y

P

P0102, P0113

B

Ground

T

BL

Y

P

B

P0102, P0113

P

Pink 12v

T

BL

Y

B

P

P0102, P0113

Y

Yellow 5v

T

BL

P

B

Y

P0102, P0113

T

BL

P

Y

B

P0102, P0113

Y

P

B

BL

T

P0102, P0113

P

Y

B

BL

T

P0102, P0113

P

B

Y

BL

T

P0102, P0113

B

P

Y

BL

T

P0102, P0113

2010 escalade

Y

B

P

BL

T

P0102, P0113

B

Y

P

BL

T

P0102, P0113

Y

P

B

T

BL

P0102

2006 vortec

P

Y

B

T

BL

P0102

P

B

Y

T

BL

P0102

B

P

Y

T

BL

P0102, P0113, P0116

Y

B

P

T

BL

P0102, P0113

B

Y

P

T

BL

P0102, P0113

 

[JKIII FJ40]

Hard top progress, at least this is starting to shape up. I am using Pettits EZ poxy, this is the second coat. I should be able to have it pretty good with one more coat. I will wait until I test fit the hard top before doing the final coat.

 

[JKIII FJ40]

Next project, I need to wrap up this project before the next one begins. Thanks to @JohnnyC for picking up a cowl for me to start the fun (photo of JohnnyC aka TEQ logistics from his thread).

 

[JKIII FJ40]

Success, I finally solved the issue that was plaguing me for months. I had been struggling to figure out why my check engine light was on for quite some time. It was a learning (painful learning) experience for sure. In the end it was a bad MAF, I used AI via Google and it did help point me in the right direction. I had two identical MAFs with faulty IAT circuits. Once I checked everything multiple times and finally ruled out the ECM and the harness. Also it took a third multimeter to check the MAFs for continuity, once that was confirmed then it was a no brainer.
I then washed it and put it away for the night.

 

[ceylonfj40nut]

Success, I finally solved the issue that was plaguing me for months. I had been struggling to figure out why my check engine light was on for quite some time. It was a learning (painful learning) experience for sure. In the end it was a bad MAF, I used AI via Google and it did help point me in the right direction. I had two identical MAFs with faulty IAT circuits. Once I checked everything multiple times and finally ruled out the ECM and the harness. Also it took a third multimeter to check the MAFs for continuity, once that was confirmed then it was a no brainer.
I then washed it and put it away for the night.

View attachment 4180251

Washed the MAF or the multimeter? What’s that 40 hiding in the back?

 

[JKIII FJ40]

Washed the MAF or the multimeter? What’s that 40 hiding in the back?

apologies, washed the White 40 as it was in the garage for a long time and had accrued a lot of dust. The 40 in the back is mine, its a 74.

 

[ceylonfj40nut]

I was just jacking with ya!

 

[JKIII FJ40]

I was just jacking with ya!

no worries.

 

[70fj40]

Success, I finally solved the issue that was plaguing me for months. I had been struggling to figure out why my check engine light was on for quite some time. It was a learning (painful learning) experience for sure. In the end it was a bad MAF, I used AI via Google and it did help point me in the right direction. I had two identical MAFs with faulty IAT circuits. Once I checked everything multiple times and finally ruled out the ECM and the harness. Also it took a third multimeter to check the MAFs for continuity, once that was confirmed then it was a no brainer.
I then washed it and put it away for the night.

View attachment 4180251

Beautiful FJ40.

 

[JohnnyC]

Two bad MAF go figure … how f-ing annoying … glad u figured that out !

Now onto the next thing lol

 

[JKIII FJ40]

I added additional rear lighting to the 77, I have rear lights on my 74 as well. I prefer to see more than what the rear back up lights can provide sometimes. These lights are only 750 lumens, just enough to provide light out about 20'-30' when needed in the big mall parking lots. I need to find an illuminated switch that will match the OE switches for both rear and front lights as I have two holes left on the dash. I could add a switch panel to the ash tray area and plug the dash holes too. Decisions, decisions.....
The final check list is getting smaller and smaller by the day. I need to test fit the topnault hard top side panels, soon so they can get ready for paint. I dont recommend buying them unless you plan on taking them apart to repair an OE hard top. Ironically I had good luck with the doors, weird. I also plan on adding A/C but that may be a winter project and also find new seats. I like the procar seats but they are fixed and set up for my kid so they are too high for me to ride comfortably. I also need to pull a leaf from the front springs as well too.

 

[Mike Shull]

I added additional rear lighting to the 77, I have rear lights on my 74 as well. I prefer to see more than what the rear back up lights can provide sometimes. These lights are only 750 lumens, just enough to provide light out about 20'-30' when needed in the big mall parking lots. I need to find an illuminated switch that will match the OE switches for both rear and front lights as I have two holes left on the dash. I could add a switch panel to the ash tray area and plug the dash holes too. Decisions, decisions.....
The final check list is getting smaller and smaller by the day. I need to test fit the topnault hard top side panels, soon so they can get ready for paint. I dont recommend buying them unless you plan on taking them apart to repair an OE hard top. Ironically I had good luck with the doors, weird. I also plan on adding A/C but that may be a winter project and also find new seats. I like the procar seats but they are fixed and set up for my kid so they are too high for me to ride comfortably. I also need to pull a leaf from the front springs as well too.

View attachment 4180731

View attachment 4180732

View attachment 4180733

This thing is looking good! I am glad that you got your MAF figured out. I have been working to dial in my LS intake and it is finally starting to work out. It takes time to iron out the details. I’ll be happy if I don’t have to look at a MAF table for another decade.

 

[JKIII FJ40]

This thing is looking good! I am glad that you got your MAF figured out. I have been working to dial in my LS intake and it is finally starting to work out. It takes time to iron out the details. I’ll be happy if I don’t have to look at a MAF table for another decade.

forgot to add I need to get it tuned once its run some more. Damn, always forgetting something. At least the CEL is off, damn idiot lights annoy me.
At work we've replaced several van motors as people drive the vehicles with out coolant and the check engine lights are on. Recently had one high mileage loose a motor, when we checked the dipstick is was bone dry.....Always thought there was a margin of error but it affirmed that the engines need oil and water sometimes.

 

[Mike Shull]

forgot to add I need to get it tuned once its run some more. Damn, always forgetting something. At least the CEL is off, damn idiot lights annoy me.
At work we've replaced several van motors as people drive the vehicles with out coolant and the check engine lights are on. Recently had one high mileage loose a motor, when we checked the dipstick is was bone dry.....Always thought there was a margin of error but it affirmed that the engines need oil and water sometimes.

They can run a little bit without fluids. It took me the better half of a year to figure out how to remove the throttle disable function on mine when the check engine light was on. There were multiple tables with the app set to zero. Hopefully I found and corrected all of them. It’s a fun learning curve that isn’t fun when I am in the middle of an intersection without a throttle. I’ll be running a cable next time.

 

[JKIII FJ40]

Success

Two bad MAF go figure … how f-ing annoying … glad u figured that out !

Now onto the next thing lol

one actual bad MAF, one bad MAF because I’m a dumb arse and was experimenting.
Still a few more things to do before I start the next project. Kid is driving the wife around today, as soon as the hard top is done I will have room for the next project to start. Of course I have many house projects to do so I need to get them done so the wife doesn’t kill me or give me a hard time about priorities. Her priorities are not mine and vice versa.

 

[JKIII FJ40]

Update, kid liked driving the 40 today. Just took off on another trip, JohnnyC spotted her too. She took her BF who doesnt have a license for a drive, the times are a changing. Dont remember ever having a girl drive me around back in the day. His comment which sums it all up, "man this is tall".....