94-95 Mustangs Tuning WhereToStart

From Mustang-Tech

Contents

Where do I Start Tuning???

The Basics

First and foremost, you must understand how an engine works. If you don't understand basic concepts like the four stroke cycle, how engine load is measured and spark advance, you will get very frustrated trying to work through tuning issues on you car. Take the time to learn these basic things and the tuning experience will be much more rewarding.

Your Car's Engine Combo and Software

The "Getting Started" manual, included with the twEECer software is an EXCELLENT resource. Download the latest twEECer Getting Started manual

  1. Verify your car is mechanically sound and vacuum leak free
  2. Start from the base tune of the EEC you are using
  3. Put in CID, MAF transfer and injector settings
  4. Get it idling
  5. Fine tune...
    1. Injector Timing
    2. Injector Slopes
    3. Voltage/Battery Offset at different voltages
    4. MAF Transfer

Necessities of a Tune

Mike Glover (creator of the twEECer) has this to say on the necessities of a tune...

Have you done the necessities:

  • CID
  • Injector slopes
  • Injector offset vs Battery
  • Injector Breakpoint
  • Injector Min PW (1994 & newer)
  • MAF Xfer
  • disable any emissions equipment not in use (egr & smog).
  • cammed vehicles will probably need idle raised to 800-1000 depending on cam specs.

These basics should have the car running enough to get some logging done and see where your at with your idle. Letting the car idle for about 120secs (cold) or 60secs (warm) should get you into closed loop and you can see where your lambse value(s) go (up or down) in relation to Stoich, 14.7. If the car wont idle, then you probably have something else giving you headaches.

If your lambse value(s) are above then it is leaning and if they are below, then fuel is being added to reach stoich. make the needed correction in the maf xfer in the corresponding maf voltage/flow data points. You should see your lambse values correct. If your lambse values are too low or too hi, your KAMFRF values will remain at 1.00.

Data to include in datalog:

  • Inj PW1
  • LAMBSE1
  • KAMRF1
  • HEGO1
  • MAF kg/hr
  • MAF Volts
  • Throttle status
  • ACT
  • ECT
  • Battery Voltage
  • Load
  • Load %
  • Spark Advance
  • RPM
  • TPS
  • MPH

Wideband data is always a good addition.

Getting Started with BinaryEditor [1]

  1. Open BE and read back the tune that is in the tweecer.
  2. Save it with whatever name you want.
  3. If the tune in the tweecer already has a payload in it from using the CalEdit software then BE can read that back. Press the Read HW on the datalog tab in the BE. This will read the payload and select the payload parameters. Now you can save the Payload by selecting Save in the payload selction of the data log tab in the BE.
  4. Now with the key in the on position you can press the START button. You should now see data in the table format and on the dashboard tab.
  5. If 3 was not true then you can select the parameters you want to log and then select the save button on the payload section.
  6. Now you have to download the new tune with the new payload.
  7. Now you can select the start button and watch the data.
  8. If you want to log the data then select the datalog checkbox on the datalog tab.
  9. The logs are placed in the C:\ProgramFiles\BinaryEditor\datalogs\

Getting Started with Moates.NET F3 [2]

Q: What chip addressing do I use when programming a F2 or F3 for EEC-IV ?

A: When programming for EEC-IV, you want to put a 56k binary at:
Chip Addressing: 032000-03FFFF
Buffer Addressing: 000000-00DFFF

Q: What chip addressing do I use when programming a second tune?[3]

A: Use the same addresses as above, just have the chip switched pins shorted.

Setting up the Switch

Switch Solder Points
Switch Solder Points

Just solder two wires, one to each small tab on the F3, and you’ll be able to short them together to allow the switching to occur. You use this switching action during the programming cycle to control which half of the chip is being accessed during the read/write.

Getting Started with TunerPro [4]

The CBAZA XDF is set up for a full 64k binary file (not Tweecer friendly). You can either 'pad' the first 8k of your bin (using a hex editor such as HDD Software's Hex Editor v2.0) with null data or use the TunerPro xdf header editor (ctrl + F2) and set up the bin size to 0xE000 and use a offset of 0x2000 with the subtract tick box checked. This may screw up the checksum calculation but I'm not 100% on that.

Links

Notes

  1. ↑ From Clint Garrity
  2. ↑ http://www.moates.net/mike/faq.html
  3. ↑ http://www.moates.net/phpforum/viewtopic.php?p=2316&sid=38d730b5bdb5251927ec628a52cb3e2c
  4. ↑ http://forum.tunerpro.net/viewtopic.php?t=528
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