OL THROTTLE BREAKPOINT

Definition: The voltage level returned from the TPS which tells the EEC to perform WOT Fuel control

Platform: Fox/SN95

Min Value: 0

Max Value: 4.9999

Description:
In actuality this breakpoint is your Idle TPS voltage plus the value you set here, the stock A9L setting is approximately 3.71v

Hints:
As a general rule of thumb, I set this to 2-2.5v and forget about it. Setting it to 2v would be for power adder applications where WOT fuel control needs to be enabled earlier, this includes NOS, SC's and Turbo setups. Setting to 2.25-2.5v is more in line with Naturally Aspirated setups but a large CID setup can benefit from a setting used for power adders. I dont recommend setting below 2v as your mileage and spark plugs will suffer.

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This is Throttle Position voltage when the EEC goes into open loop. All WOT functions and scalars are read once the EEC goes into WOT. The EEC calculates WOT by TP_REL. To get TP_REL, the EEC takes the voltage at closed throttle when the key is turned on. It then takes this voltage and subtracts it from the actual voltage from the sensor to get voltage relative to closed throttle. This voltage is then converted into A/D counts from 0 to 1020.

Example: The system shows .8 volts at closed throttle, and actual voltage from the sensor is 2.8 volts, subtract .8 from 2.8 and get 2 volts. You take 2volts/5 volts (the max possible voltage) and multiply by 1020. .4 X 1020 = 408 TP_REL counts. If you just remember to add the voltage at closed throttle (.8v) to the WOT_VOLTAGE 2.44144 you get WOT activated at 3.24144v