Anyone using JB4?

[Jesse DaBears]

No. It doesn't update at a reasonable interval. Usually I have to drive about 50 miles before JB4 actually reads properly. Using JB4 readout for Flex fuel content is a bad idea. It's a universal JB4 problem apparently.

If its not reading correctly you need to adjust your offset.

Sponsored

 

[dethred]

If its not reading correctly you need to adjust your offset.

It eventually does, but not quickly enough to be useful. Fuel-It updates rapidly, but the JB4 lags behind to the point of being useless as a measurement.

 

[zrk]

It eventually does, but not quickly enough to be useful. Fuel-It updates rapidly, but the JB4 lags behind to the point of being useless as a measurement.

Odd. mine updated just a second or so behind the Fuel-It. I always double checked, but it was always right. ¯\_(ツ)_/¯

 

[dethred]

Odd. mine updated just a second or so behind the Fuel-It. I always double checked, but it was always right. ¯\_(ツ)_/¯

Oh mine has worked a few times pretty close to "as expected", but it's inaccurate so much that it's risky for me to use JB4 instead of Fuel it. Fuel-It must update around 1-2hz minimum. Last time I changed mixture more than 5 percent (last week) JB4 didn't update until the next time I drove the car, and over 50 miles later.?

 

[RichC]

Hey all, just wondering if you could help. I’ve just installed my JB4 on a UK 2020 Supra and when I read the codes via the app, I get 2 showing;
CD990B
CD990E

I don’t seem to be able to remove them either, they remain.
Anything to worry about? I don’t have any messages on the display.

 

[LVCATZ]

Hey all, just wondering if you could help. I’ve just installed my JB4 on a UK 2020 Supra and when I read the codes via the app, I get 2 showing;
CD990B
CD990E

I don’t seem to be able to remove them either, they remain.
Anything to worry about? I don’t have any messages on the display.

When I had the JB4 I had the same codes. I think it has to do with those parts not installed on the Supra. They may be on the Z4.

They will always be there, those codes.

 

[RichC]

When I had the JB4 I had the same codes. I think it has to do with those parts not installed on the Supra. They may be on the Z4.

They will always be there, those codes.

Ah brilliant, thank you!! I’ll ignore it then and just enjoy my car

Sponsored