Builds 1994 FZJ80 5.3l and 4L60e swap

[rockrod]

Another update in regards to long range fuel trims -it was not the MAF and it's not a lack of fuel pressure.

Next move - replace the intake manifold gaskets. Apparently GM has an issue with the sealing surfaces and it's common for the vortec and LSx motors to develop vacuum leaks.

it looks to be any easy job at least.

 

[9780LC]

Thanks for all the details about your swap and writing it up. Do the gear
positions on your dash (P-L) still light up and change when the different
gears are selected in the GM transmission? If so, how did you make that
work? I would like to make this work using a 91 Land Cruiser shifter,
2009 5.3 L, LY5 and a 4l60e.

Thanks,

Bart

 

[rockrod]

I retained the wires in the harness to go back and do this, however the '94 cluster does not have a light for the OD that is controlled by the shifter selector so I never went back and did this. I suppose on the '91 cluster you can do this and it's just a matter of pinning out the MLPS on the side of the 4L60 to figure out which wire sends the 12v needed to turn on each light.

LOL, you just reminded me to go back and figure out which wire on the MLPS is for reverse. I currently don't have the reverse lights working yet.

 

[9780LC]

I retained the wires in the harness to go back and do this, however the '94 cluster does not have a light for the OD that is controlled by the shifter selector so I never went back and did this. I suppose on the '91 cluster you can do this and it's just a matter of pinning out the MLPS on the side of the 4L60 to figure out which wire sends the 12v needed to turn on each light.

LOL, you just reminded me to go back and figure out which wire on the MLPS is for reverse. I currently don't have the reverse lights working yet.

I have a 97 LC shifter being modified physically and graphically to show P R N D 3 2 L using the 91 shifter strip showing the same. The truck getting the 5.3 swap is the 97. I need to make the reverse lights work too. So, it is just a matter of finding the wires in the GM trans harness and splicing them into the shifter to make the lights on the dash work? There is an trans in plug and a dash out plug on the shifter for lighting those lights? It'd be nice for those to work but I don't know if it is worth the time to get it done. We will see about that.

Thanks,

Bart

 

[rockrod]

all the wires that go to the dash and to the reverse lights are contained in the IH1 and IH2 connectors that are found behind the glove box laying on top of the 1FZ computer.

You really need to get a copy of the EWD and study it. In regards to the 4L60e switch - yes there are wires in there for each gear selection (the PCM needs to know what gear is selected) and there's a wire that sends out 12v for the reverse lights. i honestly haven't had time to go looking for it with a test light.

 

[9780LC]

all the wires that go to the dash and to the reverse lights are contained in the IH1 and IH2 connectors that are found behind the glove box laying on top of the 1FZ computer.

You really need to get a copy of the EWD and study it. In regards to the 4L60e switch - yes there are wires in there for each gear selection (the PCM needs to know what gear is selected) and there's a wire that sends out 12v for the reverse lights. i honestly haven't had time to go looking for it with a test light.

Thank you. It's good to know that it's possible.

 

[dodoc80]

I have a similar problem with no reverse lights, on a 4L60E, I wish I had the easy answer for you, but I haven't gotten this one sorted out yet. The Toyota Trans (for me it was an A440) has a PRND32L switch on the left side that sends the shift position information up to the Dash lights, and reverse lights. It has a separate wire for each shift position.

The GM setup becomes a little more difficult in that it uses codes which are interpreted by the Computer to make this same information known to the computer for shift position. I believe there are 4 wires, and it uses combinations of these 4 wires to send all 7 different signals. The computer then sorts it out. In order to wire directly to the dash shift position indicator lights it seems like you would have to be able to use relays or some sort of logic board to sort that all out. I haven't figured out how to make all of that work. I also haven't missed having those lights. The 92 shift lever works great for me. I plan on only figuring out which of the 4L60E wire combinations means "Reverse" and wiring that one up alone for the backup lights.

If you guys have figured out a better way for this I would love to hear about it.

 

[rockrod]

The A442s only had 3 gear indicators on the trans for D2L. OD is controlled by a push button on the shifter so the dash display doesn't have the extra light.

I agree - I haven't missed mine. I will eventually solve the reverse light issue. Right now I am trying to get emissions certified through the referee and they won't test until all of the systems readiness indicators are green. Currently my O2 and EVAP are showing not ready.

 

[rockrod]

update on my emissions testing and certification:

I went back today after all of my readiness monitors switched to ready and I passed the state inspection. The HP Tuners software is the bomb.

I then went next door to the Air Care station and PASSED! They even ran it on the rollers with the 315s on it. These tires measured out at 34.5 which is technically over their limit but when I asked the guy about this, he looked and said that if the tires will fit onto the rollers and not rub on the side of the guides or try to climb over the blocking rollers, then it's good to go.

The cruiser passed. It even passed with the quick test and was on the rollers for about 30 seconds total before the test ended. So get this, my 1994 Toyota Land Cruiser is considered a 'very clean' vehicle since it did not test out for the entire 240 second test and was 'fast passed'.

My numbers are:

HC .4607 Max 1.20 GPM
CO 7.12 Max 15.0 GPM
NOx 1.7105 Max 2.0 GPM

Note that they tested the cruiser at the year model 2000 and greater standards and not the 1994 standards.

The guys gave me high fives, I paid my $25 and was on my way.

The cruiser is now officially 'legal' in the eyes of Air Care Colorado.

 

[alia176]

Woohooo, congrats dude, nice job and hopefully a closure to this chapter of the project. Now, get going on the other niggling things that are on your plate. Then, when it's all said and done, put it up for sale, LOL!!!

 

[rockrod]

another update:

Fixed my flaky tach issue. It turns out the output pulse signal in the vortec pcm was set wrong and was causing the stock indash tach to jump around. I reset the signal back to the stock LS1 4 count per rev and then using my dakota digital converter I was able to stabilize the gauge. Now it's smooth and responds correctly.

I also figured out how to activate the 'tow/haul' mode.

Normally the silverado trucks use the body control module to respond to the truck tow haul button and sends a request over the serial data to activate the secondary shift pattern. By activating the pin 71 in the blue connector, it now responds to a simple ground circuit request and momentary push button switch. By pushing the button once, the circuit from the pin 71 is ground to chassis and the PCM commands tow haul mode and raises the shift points, holds the gears longer, and firms up the shifts. Push the button again and it reverts to normal mode.

pretty cool! I can go back and edit the shift patterns later as needed.

 

[warpdriv]

I also figured out how to activate the 'tow/haul' mode.

Mondo cool!!

 

[9780LC]

Did you get your LT and ST fuel trims figured out? We had to use air straighteners in the intake tube before the MAF to get where we liked the readings. We were also unable to reuse the Toyota air box/filter. We had to come out to a high capacity cone filter.

On another note....

I also think it is just about impossible to front these late model chevy engines with a touchy MAF with a snorkel. These engines seem to need a high capacity air filter/intake to function correctly. I was unable to find any inline air filter that I could use with a snorkel and get the MAF to function correctly. Late model LS engine+snorkel = beware. We tried many options over a 6 week period and could not find a solution. If you know of a solution that might work, please let me know. The best option that I saw was specter's 4 in 4 out inline filter. Even its air capacity, I don't think, is good enough.

Thanks,

Bart

 

[rockrod]

Hmm. My issue was with the LTFT. Short term was fine. I corrected it by resealing the vacuum connection for the brake booster. Had a bit of a leak there. I also *lightly* retorqued the intake manifold retaining bolts and found 3 that were loose. This had a profound effect on LTFT but didn't last. I ended up pulling the intake and replacing the gasket with the updated version from GM and used new bolts.

Problem was solved for now. It seems most of the engines left the factory with defective gaskets and there is a standing TSB to replace them.

 

[alia176]

Regarding the tow/haul mode, what momentary switch are you using for this feature? It also sounds like your old ECT function that you used to have.

 

[rockrod]

it's a momentary push button switch i installed in the dash. it has to be a switch the only provides a quick ground for the pcm to switch it over to the secondary shift pattern. The ECT switch and OD switch in the cruiser wont work because they are on or off, not momentary.

i got it from radio shack.

 

[alia176]

it's a momentary push button switch i installed in the dash. it has to be a switch the only provides a quick ground for the pcm to switch it over to the secondary shift pattern. The ECT switch and OD switch in the cruiser wont work because they are on or off, not momentary.

i got it from radio shack.

What, no pics?

 

[RockJock82]

I have a similar problem with no reverse lights, on a 4L60E, I wish I had the easy answer for you, but I haven't gotten this one sorted out yet. The Toyota Trans (for me it was an A440) has a PRND32L switch on the left side that sends the shift position information up to the Dash lights, and reverse lights. It has a separate wire for each shift position.

The GM setup becomes a little more difficult in that it uses codes which are interpreted by the Computer to make this same information known to the computer for shift position. I believe there are 4 wires, and it uses combinations of these 4 wires to send all 7 different signals. The computer then sorts it out. In order to wire directly to the dash shift position indicator lights it seems like you would have to be able to use relays or some sort of logic board to sort that all out. I haven't figured out how to make all of that work. I also haven't missed having those lights. The 92 shift lever works great for me. I plan on only figuring out which of the 4L60E wire combinations means "Reverse" and wiring that one up alone for the backup lights.

If you guys have figured out a better way for this I would love to hear about it.

Its just a matter of finding what wire does what per the EWD. The MLPS has a common power wire so depending on which gear/position you are in power is being sent to the according wire. My dash works lights work as so does the reverse lights. Pretty simple

 

[rockrod]

yep - get a test light and pull the connector(s) from the 4l60e.

With the ignition on, manual shift the trans through the gears and take note of which pin lights up the test light in that specific gear.

Then run the wires accordingly.

I did not worry about my dash lights. I only wanted the reverse lights to work so that's all I hooked up.

the earlier 4l60e transmissions have two connectors that go to the mlps. The later ones use a single connector. They can both be a royal pain to remove from the trans if they have been on there for a long time.

 

[alia176]

Did you end up finishing up the wiring spreadsheet?