Save Gas?
Hall Of Fame
Joined: Jun 2005
Posts: 14,228
Likes: 19
From: Riverton, UT
A throttle position sensor (TPS) is a sensor used to monitor the position of the throttle in an internal combustion engine. The sensor is usually located on the butterfly spindle so that it can directly monitor the position of the throttle valve butterfly.
The sensor is usually a potentiometer, and therefore provides a variable resistance dependent upon the position of the butterfly valve (and hence throttle position).
The sensor signal is used by the engine control unit (ECU) as an input to its control system. The ignition timing and fuel injection timing (and potentially other parameters) are altered depending upon the position of the throttle, and also depending on the rate of change of that position. For example, in fuel injected engines, in order to avoid stalling, extra fuel may be injected if the throttle is opened rapidly (mimicking the accelerator pump of carburetor systems).
Check out the DIY section http://www.v8performance.com/tipsandtricks.htm#TPS_Mod
Dude If you take off and clean your throttle body and IAC selonoid , then set the TPS you will notice a increase in power, engine smoothness, and may be MPG's
The sensor is usually a potentiometer, and therefore provides a variable resistance dependent upon the position of the butterfly valve (and hence throttle position).
The sensor signal is used by the engine control unit (ECU) as an input to its control system. The ignition timing and fuel injection timing (and potentially other parameters) are altered depending upon the position of the throttle, and also depending on the rate of change of that position. For example, in fuel injected engines, in order to avoid stalling, extra fuel may be injected if the throttle is opened rapidly (mimicking the accelerator pump of carburetor systems).
Check out the DIY section http://www.v8performance.com/tipsandtricks.htm#TPS_Mod
Dude If you take off and clean your throttle body and IAC selonoid , then set the TPS you will notice a increase in power, engine smoothness, and may be MPG's
WOW!
Great write up!
I did a little detailed search on the web to get understandable info. I just want everyone that reads this to understand and not be like> 
Champion
Joined: Aug 2005
Posts: 3,313
Likes: 8
behind the 'snake oil' eBay chips
is the idea of improving your 'real world' combustion timing
so that you get peak pressure about 10 to 15 degrees
past top dead center
you will have a better chance of achieving this
with a larger spark gap
and indexing the plug ground strap position
so that it does not interfere with
rapid combustion
but the maximum gain to be had is small
perhaps 5% at best
unless
one of your spark plugs was malfunctioning anyway
then a 12% gain is likely just by fixing that
is the idea of improving your 'real world' combustion timing
so that you get peak pressure about 10 to 15 degrees
past top dead center
you will have a better chance of achieving this
with a larger spark gap
and indexing the plug ground strap position
so that it does not interfere with
rapid combustion
but the maximum gain to be had is small
perhaps 5% at best
unless
one of your spark plugs was malfunctioning anyway
then a 12% gain is likely just by fixing that
Record Breaker
Joined: Jan 2008
Posts: 1,163
Likes: 1
From: Upstate Ny
Simply put. Chipped(not programmed)/fuel magnets/ tb spacer/ air modifiers for stock intake/ electric superchargers. Dont work, never will. Leave it be... I myself have found the best gas saver... I should charge $5.00 to tell you, but i will anyways.. DONT DRIVE..