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    No,you don’t need the MAPECU IAT sensor in MAF...

    No,you don’t need the MAPECU IAT sensor in MAF intercept mode because the OEM one is still there and working. You don’t want double IAT compensation.
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    The MAPECU3 does not have the required amplifier...

    The MAPECU3 does not have the required amplifier to process a knock sensor signal into something useful as it was a function added later rather than designed from the beginning. That means you do...
  3. Hi James, The injector size is a hard one as...

    Hi James,

    The injector size is a hard one as it depends on a number of factors, like fuel pressure as one example. It will probably be fine but we have to be conservative with our recommendations....
  4. Hi James, welcome and thank you for the detailed...

    Hi James, welcome and thank you for the detailed information about your vehicle.

    We have lots of 2JZGTE base tables tuned for different injector size upgrades but 1JZGTE ones are thin on the...
  5. I can only assume you manual is incorrect for...

    I can only assume you manual is incorrect for some reason. The fragment I posted was from the MKIV Supra repair manual and we have been using that diagram for many years. The order is important for...
  6. Hi Tim, Apologies for the delay responding, we...

    Hi Tim,

    Apologies for the delay responding, we are in COVID-19 lockdown and we are closed.

    The different ignition pinout labels is interesting as it is the first time we have been told that. ...
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    Hi Tim, Apologies for the delay responding, we...

    Hi Tim,

    Apologies for the delay responding, we are in COVID-19 lockdown and we are closed.

    Yes, wire the Analog #1 input the same as the MAF input wiring.

    MAPCAL3 was written to detect...
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    MAF Intercept mode means the MAPECU3 only...

    MAF Intercept mode means the MAPECU3 only intercepts the MAF signal and the 494 zone fuel table is configured to allow voltage adjustments, both positive (more fuel) and negative (less fuel). You...
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    Apologies for the delay responding, we are in...

    Apologies for the delay responding, we are in complete lockdown due to COVID-19 which means all non-essential businesses are closed. :(

    Anyway, are you referring to this wiring diagram on the...
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    Thanks, that is the latest software and a new...

    Thanks, that is the latest software and a new MAPECU3 with the latest MAP sensor. I believe the logging is in psi rather than inHg so -15psi should cover -30inHg, will have to check. Can you please...
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    I'm not sure they there is a discrepancy. I seem...

    I'm not sure they there is a discrepancy. I seem to recall a bug that was fixed a long time ago that was similar.
    What version of MAPCAL are you using?
    What pressure scale do you have...
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    Welcome! You are 100% correct, you can zero...

    Welcome!

    You are 100% correct, you can zero the primary fuel table for normal running and then tune the secondary fuel table for off roading and richer AFR's. It may also be useful to adjust...
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    Possibly, or you just have too much fuel in the...

    Possibly, or you just have too much fuel in the MAPECU3 fuel table. I depends on the fuel trims and if you are in open loop. O2 Adjust should be zeroed in the open loop parts of the fuel table.

    ...
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    It sounds like you have an OBD2 scanner connected...

    It sounds like you have an OBD2 scanner connected which is vital for a IS300 OEM ECU, they are tricky little beasts! :)

    Does your OBD2 scanner tell you when you are in closed loop and open loop? ...
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    Welcome! Yes, there are full PDF manuals and...

    Welcome!


    Yes, there are full PDF manuals and MAPCAL3 tuning software available on the website under Downloads>MAPCAL


    You will probably find the manual helps explain. MAF intercept mode...
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    It could be a number of things: Which base table...

    It could be a number of things:
    Which base table have you loaded? The NA Supra base table is frequency based not voltage based and not setup for MAF Intercept.
    Can you upload a MAPCAL dashboard...
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    Sorry, we don't have copies of the URD tuned base...

    Sorry, we don't have copies of the URD tuned base tables. Perhaps call URD and select the tech support line, you should get Gadget.

    Regarding erasing the table in the MAPECU3, the only way this...
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    Hi, I am pretty sure we replied to your email you...

    Hi, I am pretty sure we replied to your email you sent back on the 8th and then the 19th. There are no jumpers to change in a MAPECU3 so it should just be a matter of wiring up and running.
    ...
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    We usually recommend a new sensor. If you...

    We usually recommend a new sensor. If you disconnect the OEM sensor from the OEM ECU you will probably get a CEL. The knock sensor is not a resistor, it is a microphone, so we don't think a...
  20. I believe the 2000 model year is the 1998-2000...

    I believe the 2000 model year is the 1998-2000 version which uses the normal narrowband sensors, 4 of them I believe. The idea would be to run the pre-cat sensors through the O2 Adjust function but...
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    Good to hear the wideband is working OK. ...

    Good to hear the wideband is working OK.

    That is correct, your scanner has no idea you are making changes to the ignition timing as it is happening right before the ignition coil and spark plug....
  22. Some of that is not quite correct. You don’t need...

    Some of that is not quite correct. You don’t need to toggle maps for open and closed loop tuning. The O2 Adjust function is designed for the stock O2 sensors but we haven’t tried it on the 1UZ. It...
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    We haven't heard back from the other member. We...

    We haven't heard back from the other member. We can have a look at your log if you are able to log the event? Could your IAT be suffering heat soak?
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    You have to wire 2 wires. The OEM MAP sensor...

    You have to wire 2 wires. The OEM MAP sensor output is connected to a spare MAPECU3 analog input configured to "FCD1" and then you configure a MAPECU3 analog output also to "FCD1" and connect that...
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    You can edit the pressure scale file...

    You can edit the pressure scale file MAP_CONFIG.cfg if you really want to but we might need to provide advice on the layout.

    Thanks for the link to the ZT2 PDF. Are you using the white or purple...
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