An overdrive pedal is used in music. It helps to increase the power of the amp without having the change any of the nobs. This can be used to increase tones.
The sensor will be by the accelerator pedal
You can plug in your drum foot pedal and hit the pedal to activate overdrive.
To change the sound, For instance an overdrive pedal boosts the sound making it louder and clearer, where as a distortion pedal makes it louder but less clear.
on the brake pedal bracket
Throttle position sensor.
check the injection , and go for tuning. the tuning might be off
The easiest way is to buy an Overdrive/Distortion pedal, which can cost anywhere from $20 buck to $100+
The Boss DS-1 Distortion Pedal is an all-around good piece of equipment. Although it is on the inexpensive side, it still produces a solid tone that can be dialed-in with your amp to get everything from a lightly crunchy overdrive to a higher-gain distortion. Kurt Cobain and many others have used the orange pedal as an additional overdrive box to supplement their amplifier distortion. It will work as well with a Peavey amp as it will with anything. What it really comes down to is your own taste. As with any pedal, it will combine its own tones with the amp's sound to produce the final distortion tone. Either way, it's a good pedal (especially for the price) and it's worth experimenting with.
It gives the clutch pedal a softer, smooth feeling. Some people remove these for a more direct pedal feel
Gain effects lie overdrive, compressor etc go between the guitar and amp, time based effect eg flange, chorus go in the effects loop.
Over drive is always to reduce engine RPM at Med to high speed cruise thus saving fuel. If this is an Automatic car just ignore the Overdrive and let it work. If this is a manual car use over Drive when maintaining a steady speed and the car will not "Labour" to do so.
Overdrive keeps your engine RPMs low when you drive faster than 45 mph Its there for fuel economy If you drive without OD it doesnt hurt anything at all except your gas mileage