Some Basic TwEECer Tips
 

Here is some stuff not really addressed in the TwEECer manual, as downloaded from http://www.tweecer.com/downloads.htm

1. The "Update Only" checkbox has a bug that will randomly corrupt the tune when it is loaded into the tweecer. Always double check that this box is not selected after making modifications, as it seems to be check by default. The checkbox shows at the bottom of each of the tabs.

2. When datalogging make sure that you have created a payload and saved the tune (.ccf file) with the "Data Logging" checkbox selected. If this is not done then CalCon will not show any activity while the engine is running.

3. Do not remove the file "Logfile" from the folder "LogFiles". This file is a format file that is used each time a datalog is created. Without the file in this location, datalogging is not possible.

4. The A9L strtategy uses the Function - Injector BreakPoint a little differently than other strategies. For most strategies the Inj PB is the point at which the computer switches between the Injector High Slope and Injector Low Slope, which makes sense.
The A9L however is slightly different in that the Injector BP is actually used as an Injector PulseWidth modifier, and the Injector BP is hard wired into the EEC as 2ms. When you make a change to the Function Inj BP you are actually changing how much fuel is cut from the Inj PW below 1,500rpm. The use of a larger number in the Inj PB Function will pull more fuel from the already calculated PulseWidth, until 1,500rpm.

5. The TwEECer Manual does not mention that the Injector Minimum Pulse Width is locked at 2ms (as mentioned above) for all A9L strategy computers. For A9L tuning there is no Injector Minimum Pulse Width setting which can be adjusted.

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Here is a summary of some of the first changes that need to be made when starting out with the TwEECer. After performing these changes it would be a good idea to do some data logging and verify that KAMRF 1 & 2 are not too far off from 1.00. The EEC-IV seems to have a maximum adaptive ability of 12%. If you are getting readings of 1.12 or .88, then you have maxed out the ability of the computer to make changes with the KAMRFs.

Hardware/Hard Tune Changes
1. Set Base Timing to 10*
2. Set Fuel psi to 38-39, or install stock regulator
3. Set Base Idle (make contact with idle screw, then turn 1/2 turn more)
4. Set TPS to .98-.99v using CalCon (Some even use .95v)

TwEECer Changes
1.Turn off EGR function (If system has been removed)
2. Disable Thermactor Control (If system has been removed)
3. Set idle
4. Change MAF Transfer (download if available)
5. Change Injector High/Low Slopes per TwEECer Manual. If using a 190/255lph pump, or using Cobra ecu, then set both same
6. Change CID scalar
7. Change/Verify MAF min/max voltage (0v, 5v)
8. Change Adaptive Update Rate values to either 3or 10. All values except the bottom 2 rows can be changed (you don’t want to change closed throttle positions as it will cause problems on decel).