What happens when the accelerator pedal is pressed?
When the driver presses on the accelerator pedal, the throttle plate rotates within the throttle body, opening the throttle passage to allow more air into the intake manifold, immediately drawn inside by its vacuum. Usually a mass airflow sensor measures this change and communicates it to the ECU.
How does accelerator pedal position sensor work?
The accelerator pedal position sensor works by using a Hall Effect sensor that determines the location of the pedal by a magnetic field. It produces a change in the charge based on a change in the position of the pedal. The information is relayed to the ECM to let it know how hard you are pushing on the gas pedal.
What kind of ECU does a VW Jetta have?
Below, we’ll explore some of the most proven aftermarket parts available for these loveable little TDI’s. The quickest, easiest way to wake up the ALH 1.9L TDI diesel in ’99-’03 Jettas is to reprogram the ECU. Big names in the tuning game for these cars are Kerma TDI, Malone Tuning, Rocket Chip Performance and TD Tuning.
Which is better VW Jetta 01J or 02j?
With the 02J five-speed manual being a much more reliable option than the four-speed 01M automatic offered in the ’99-’03 Jetta TDI’s, most enthusiasts row their own gears. However, as soon as the first nozzle upgrade is performed the OEM clutch can begin to slip.
How much horsepower does a VW Jetta have?
Adding to the ALH Jetta TDI’s tremendous fuel-sipping capability is the fact that it weighs less than 3,000 pounds. However, with just 90 hp and 155 lb-ft of torque available at the crank, these cars feel anything but light on their feet.
Is the VW Jetta bv39b twice the power?
In conjunction with DLC 1019 nozzles and custom tuning, we’ve seen the BV39B support twice the factory torque rating and a 75-percent increase in horsepower without sacrificing any drivability, fuel economy or engine longevity (the car is still running the exact same, six years after the build).