Builds US Spec. February 1990 Poverty 80 2uz/h151f swap (2 Viewers)

[RivMan]

Another idea to try, track down an 05 GX MAF and intake tube to try out.

If you have the wrong MAF cal, it’s probably that one.

Edit: As I type this, I’m thinking about how I would handle tuning a Manual swapped LS vehicle. I would start with a base calibration from a vehicle that came stock with a manual. Do you know what base (starting point) calibration your tuner used?

-Rob

 

[Bripars40]

I wanted to share it here first that I am going to offer this for sale after I get it sorted. Final price will depend on how deep I ultimately end I am and how it is sold. If anyone is interested you welcome to send me a pm.

Pm sent. I’d consider taking it as-is

 

[Rednexus]

This thread popped up and I read all 18 pages of it! Interesting to see one of my threads tagged as well.

My GX470 has had MAF issues on and off for some time. I've had to replace the MAF pigtail twice, and I watch MAF readings to Torque Pro to have some indication of how the engine is running. Your MAF readings seem pretty low to me. They should be 1 gram per second per liter, or 4.7 g/sec. Most of yours appear to be in the range of 3, which is around 30% lower than it should be. If it is getting way more air than it thinks it should, you'd have high fuel trims as the motor would be running quite lean. So, I agree that it seems to be a MAF/intake issue. If you have a GX470 ECU, I agree on trying a VVTI GX470 air intake setup for it and seeing what happens.

Also, which MAF do you have? Looks like the GX470 MAF is shared with the VVTI LX470/LC100 and V8 4Runner (along with the later GX460/LX570/LC200), but not the Tundra/Sequoia of the same generation. I have a Hitachi MAF0103 in mine, which is the OEM sensor.

 

[Tank5]

I have not had time to work on this until now.

I swapped out the MAP sensor for a new Toyota. Part specific for the 2006 LC. I made sure it is in the same orientation as it would have been it. Installed it with a new Filter to keep it clean. I located the filter just in front of the intake so I won’t have to pull the intake to swap it.

Fuel Trims after are still high.

 

[Tank5]

Another idea to try, track down an 05 GX MAF and intake tube to try out.

If you have the wrong MAF cal, it’s probably that one.

Edit: As I type this, I’m thinking about how I would handle tuning a Manual swapped LS vehicle. I would start with a base calibration from a vehicle that came stock with a manual. Do you know what base (starting point) calibration your tuner used?

-Rob

Hey Rob, thanks again for the thoughts. The 2UZ VVTI did not come as a manual in any market that I am aware of , so finding a factory tune for it as a manual is not an option.

The set up I have is no different than the gx470 intake set. Cross referencing the MAF sensor across the LC, LX, GX, and 4runner that came with the 2uz VVTI all use the same MAF sensor.

This thread popped up and I read all 18 pages of it! Interesting to see one of my threads tagged as well.

My GX470 has had MAF issues on and off for some time. I've had to replace the MAF pigtail twice, and I watch MAF readings to Torque Pro to have some indication of how the engine is running. Your MAF readings seem pretty low to me. They should be 1 gram per second per liter, or 4.7 g/sec. Most of yours appear to be in the range of 3, which is around 30% lower than it should be. If it is getting way more air than it thinks it should, you'd have high fuel trims as the motor would be running quite lean. So, I agree that it seems to be a MAF/intake issue. If you have a GX470 ECU, I agree on trying a VVTI GX470 air intake setup for it and seeing what happens.

Also, which MAF do you have? Looks like the GX470 MAF is shared with the VVTI LX470/LC100 and V8 4Runner (along with the later GX460/LX570/LC200), but not the Tundra/Sequoia of the same generation. I have a Hitachi MAF0103 in mine, which is the OEM sensor.

See post above but I found that the MAF for the LC, LX, GX, 4runner 2uz VVTI show two part numbers 22204-75030 replaced by 22204-0F030. I have both of these MAF sensors and both perform equally.

The intake I am using is from a LX470 but see that all models use the same MAF I don’t see that switching out the intake for one off of a GX is going to make a difference.

I have previously replaced the MAF plug because I was getting a low voltage code on MAF circuit after which has not returned. Maybe there is still an issue with the MAF circuit but I did test it following the manual troubleshooting procedures and it all tested in spec. That leave the ecu as the potential issue but that would mean that I have two bad ecu’s because I bought and extra for this set up. I am back to thinking about buying a fresh programmed ecu from a different vender.

I am not able to work on this like I was, so I have got time to consider my next step.

 

[samc2447]

edit; thought the manual came with vvti in other markets, but just saw that it didn't from what I can see