EECTuning.org

In addition to the protective grease there is usually a clear conformal coating on the circuit board that needs removing from the J3 connector.

Is the J3 port clean and the socket on the QuarterHorse clean and undamaged?

Firstly I would get the battery replaced in your QH. It is not worth the trouble of having to reload your tune everything you want to run it. Secondly you should use the base calibration from your V6 ECU as a starting point for your tuning. There are too many differences between the V6 and V8 calibr...

Those three functions are used for modifying the 'Desired Idle Air Flow' (aka DESMAF) value.

See FN811, FN851 and FN852 for the proportional term, derivative modifier and proportional modifier functions used in the idle speed control "rpm control" or "rpm lockout" modes.

There's no need to bother with the ALT_CAL_FLG as the ALT_CAL_DIST parameter is set to zero in the stock U4P0 calibration.

For question (1) the answer is yes, they can all get used but it depends on the ECT, transmission type and neutral / drive state for some of them.

Short indexed offsets are signed. Long indexed offsets are unsigned. The final paragraph in section 2.2.1 of the Intel 'Using the 8096' document is wrong when it says long indexed offsets are added as a 2's complement value to the register value to form the address. This is confirmed by section 3.2....

Yes, I am aware that long indexing is used for other registers as well as the zero register. As your initial post was about the addresses when using the zero register I was responding to that specific issue. It can't be address [1f298] (i.e. with data bank) as that's ROM, unless it's a specialist ch...

If the 2nd byte of the instruction is even then it is short indexed, if the 2nd byte is odd then it is long indexed. I can only recall seeing the zero register being used with long indexing and it's an unsigned index.

Disabling the checksum routine is not recommended as you will not know if the ROM becomes corrupted. It is far better to recalculate the ROM_TO value.

The ROM_TO value is the compliment of the checksum so, in every practical sense, it can be considered to be the checksum.

Yes, the 'ROM2' address is at the next address.

The GUFA 'ROM1' address is at 0x7858.

The DFSFLG flag is only used to disable the transient fuel compensation so that fuel is not added when the PW is meant to be zero.

That's the theory. However, over the years, I have been sent several calibrations that contain the patch code but no payload items that people have read from their tuning device.

Chucko wrote: ↑

Sat Jun 29, 2019 1:04 pm

The original code has the same behavior.

My apologies, the original has this same flaw too. Sloppy coding

BTW, jne and jnz are the same instruction.

The original flaw is still in there, look at what you are loading into 0x0014 on the first pass through.

The flaw has nothing to do with the location of the payload list.

The original code does not have this flaw, look at what you are loading into 0x0014 on the first pass through.

Your modification risks crashing the code as the check for the zero marker will be missed if there are no datalog payload items. You are also reducing the number of payload items.

My understanding of it is: n = number of bytes to read (starting from the address defined by MMSB, MSB, LSB) MMSB = bank ( 0, 1, 2 or 3) MSB = high byte of address LSB = low byte if address It will probably baulk if you try to read more bytes than there are between the start address and the end of t...

Sorry, I meant POPP not POPW above (that's a different instruction!).

The interrupts are not necessarily enabled after the subroutine has finished being executed. The PUSHP instruction saves the PSW register to the stack and bit 15 is the 'interrupt enable' bit. The later POPW instruction restores the PSW register to the condition it was at the point when it was saved...

The ROM_TO checksum value does not identify a strategy, it identifies the calibration. The FIXSUM parameter is used by Ford to ensure that the ROM_TO value is unique.

The 'Nominal_AFR' parameter (regardless of whether it is defined as a calibrateable parameter in a strategy or exposed as a hack) is the value the ECU uses to calculate the amount of fuel needed to achieve a stoichiometric A/F ratio for gasoline (I cannot recall seeing any stock calibration using an...

It's dying because it's overfuelling. When it gets close to the desired idle rpm, if you look near ET 57.224 shortly after the spark changes from 'idle feedback at minimum clip' to 'idle feedback', the injector pw increases and keeps on doing so until the engine stalls. You need to identify what's c...

For the sake of moving four more injector wires I think that is preferable to playing around with the injector firing order and injector output port.

What is the engine? I am curious why the injector firing order has been changed.

SMD-333 is used on the '94-'95 5.0 L manual transmission Mustangs.

I am guessing from the lack of response that no one knows. I suspect that Paul's EEC Editor may well be the only software to support that hardware.