What did you work on tonight?

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@Mauser These pictures from my techstream are what I took from my vehicle. If you can replicate them from your gx470 that would be great.

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The wife just got gome a little while ago so it was warm. It showed a vacuum leak that I didn't know about so probably won't help until I fix that. I hope you can see these.
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Mauser said:
The wife just got gome a little while ago so it was warm. It showed a vacuum leak that I didn't know about so probably won't help until I fix that. I hope you can see these. View attachment 4081241View attachment 4081242
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This is good information, thanks for taking the time to help. What I really wanted to see was your MAF reading and your atmosphere measurement.

Your readings were taken 793 rpm and mine at 703 so that will be a little different but not too much. My MAF is reading at 3.34 and yours is at 5.00, My atmosphere pressure is 3 yours is -4, that is significant. My elevation is 7800 feet what is your elevation?
 
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Tank5 said:
This is good information, thanks for taking the time to help. What I really wanted to see was your MAF reading and your atmosphere measurement.

Your readings were taken 793 rpm and mine at 703 so that will be a little different but not too much. My MAF is reading at 3.34 and yours is at 5.00, My atmosphere pressure is 3 yours is -4, that is significant. My elevation is 7800 feet what is your elevation?
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I am at 7100
 
nab856 said:
It looks like the data you provided is for 703 rpm and AF lambda is 1 (oxygen balanced). Any data for 2500 rpm?
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Here is a reading at 2400 rpm.

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Mauser said:
I am at 7100
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Wow so it seems like this is a significant difference I feel. You are at 7100 feet with a measured Atmospheric pressure of -3 on the last reading you posted. I am at 7800 with an atmospheric pressure of 3. Sure we are 700 difference but should the atmospheric pressures be this different.

I’m focusing on this Atmosphere pressure reading because someone else told me mine looked off in comparison to there’s but they were at a significantly lower elevation.

I will have to sift back through my thread and research but it was suggested if this measurement was off significantly it would affect how the ecu mixes the fuel ratio.

Any know for certain what sensor reads the atmosphere pressure. I recall researching this before but could not find the answer with certainty.
 
Tank5 said:
I asked a club member to scan their gx470 with tech stream so I would have a local data set from a good running 2uz VVTI and as a bonus they also are running headers and deleted cats, so it is a very similar set up as mine.

The biggest difference in the test is I am at 7800 feet elevation and they are at 7100 feet elevation. Their data set was taken at 793 rpms and mine at 703 rpms.

I was focusing on the MAF and atmosphere pressure readings.
Their MAF was at 5 mine at 3.34
Their atmosphere pressure was -3 mine is 3.
It seems like these should not be this far off for only 700 feet in elevation.

If you have followed along you may have seen that I went down the atmosphere pressure rabbit hole already. The MAP sensor which is under the manifold is what measures the AP. I replaced the map sensor and added a new filter and reinstalled at that time it did not change this reading at all. I “moved on” thinking this was not the issue.

The last time I sent the harness back to Tim he deleted the wiring to the MAP sensor all together as part of the SAI delete. Yet without the sensor the reading is still the same. How?

Further reading the map sensor supposedly does provide information that is used to correct Fuel Trims. I am also guessing that if the air density (AP) measurement is off this probably skews the MAF calculation which could explain why it is off.

I need to talk to Tim to see how his ecu is receiving the MAP sensor input and calculating AP for the FT mixture.

I have gotten my hopes up in the past thinking I figured it out, I am not holding my breath this time either but it seems like there is something to this.
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I wanted to cross post from my build thread what I from this information. Could be something?
 
Tank5 said:
Wow so it seems like this is a significant difference I feel. You are at 7100 feet with a measured Atmospheric pressure of -3 on the last reading you posted. I am at 7800 with an atmospheric pressure of 3. Sure we are 700 difference but should the atmospheric pressures be this different.

I’m focusing on this Atmosphere pressure reading because someone else told me mine looked off in comparison to there’s but they were at a significantly lower elevation.

I will have to sift back through my thread and research but it was suggested if this measurement was off significantly it would affect how the ecu mixes the fuel ratio.

Any know for certain what sensor reads the atmosphere pressure. I recall researching this before but could not find the answer with certainty.
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What about this?
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Dont know if this helps or not.
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Tank5 said:
Wow so it seems like this is a significant difference I feel. You are at 7100 feet with a measured Atmospheric pressure of -3 on the last reading you posted. I am at 7800 with an atmospheric pressure of 3. Sure we are 700 difference but should the atmospheric pressures be this different.

I’m focusing on this Atmosphere pressure reading because someone else told me mine looked off in comparison to there’s but they were at a significantly lower elevation.

I will have to sift back through my thread and research but it was suggested if this measurement was off significantly it would affect how the ecu mixes the fuel ratio.

Any know for certain what sensor reads the atmosphere pressure. I recall researching this before but could not find the answer with certainty.
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Dennis,
his first screen shows 3 PSIG but the later screens show -4 PSIG, so this has me stumped.

Screenshot 2026-02-06 073645.webp
 
Interesting, my eyes did not pick up the negative sign in front of the number 3. I agree, why is that a -3 and -4 in his engine?
 
Hi all, it's been a while. A sad few months for me -- Compression tested and all of the numbers were low but within 20% of each other, but based on the noises and after draining the oil again I definitely have rod knock. I got screwed by a local shop that charged me an insane amount of money to tell me what I already knew and waste my time installing some garbage aftermarket carb to "fix" the issue. Grad school leaves me with no time to work on things myself. They still haven't given me my carb back despite me asking several times for it. I do miss having assistance from y'all. The 60 is living in the garage until the summer, where I may try to source a 3FE (there are two in ABQ on FB marketplace) and do a 2FE build myself.
 
subatomic said:
The 60 is living in the garage until the summer, where I may try to source a 3FE (there are two in ABQ on FB marketplace) and do a 2FE build myself.
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You will get no argument from me. While this was for my FJ40, it should not be hard to adapt to an FJ60.
 

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When I was in AZ in January I came back and it appeared I had blown out a shock. So, like a dummy, I bought new shocks.

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As I was under the truck installing the new shock I saw this ... my rear brake proportion valve was leaking. I instantly ran to the brake rez to check the level. Whew! I was still OK.

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So, I shopped for a new valve. [cough][choke][gag]. Damn Toyota was proud of that valve. I noticed when I was looking this up Toyota also had a rebuild kit for the prop rod. So, I ordered that too, from Amayama (Japan). It was still stupid money.

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Today was the day to install. It would have been a lot easier without the aux fuel tank, but it got done.

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Installed a REDARC Tow-Pro Elite in the LX. I have a Tekonsha Prodigy P3 in the 100 and it works well. But I didn’t have a great spot to mount in my 2015 LX and it’s kind of big. I saw the REDARC as an alternate, low visibility option. I’ll see how I like towing with it soon. The location I put the knob already had a switch for turning on and off the power rear hatch. I couldn’t think of a time when I need to turn that function off so I just zip tied the switch under the dash.

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