The prior owner of the 2003 Ford Ranger with the 2.3L engine messed with the throttle position screw. I tried to adjust the TPS to the .8 to 1 setting recomended by other forum users. I know the electrical setting (.8 to 1), but I was curious to as what the throttle position percentage should be (16%, 5%, ...). I would appreciate any feedback other users have found on their personal rides regarding percentage of throttle opening at idle.

I know the pcm automatically adjusts the idle speed, but I seem to run out of throttle response after about a quarter turn of the throttle flapper. I'm thinking my throttle flapper is set way too much out. The TPS signal does advance the entire way through the flapper travel.

 

TPS is a 5 volt sensor, like most other sensors, they all share a common 5v power supply in the PCM

0v would be 0%
5v would be 100%

For the sensor to work you never want 0% or 100%
1volt = 20%, so just under 1v would be 16-19%
4.5volts = 90%, so 4.5v to 4.6v is 92%, what you should see at WOT(wide open throttle), 90% is OK

If using an OBD2 reader to monitor TPS then watch for jumps or drops in voltage or % as you move gas pedal position, should be very steady

Hesitation could be TPS but unlikely, check the throttle shaft for play and the throttle plate
Also unplug EGR valve to test if hesitation goes away

TPS doesn't control anything, its a sensor, it tells PCM driver doesn't want to idle any more when stopped and you press down gas pedal, or driver doesn't care about MPG at WOT, lol
It also tells PCM to turn off fuel injectors when coasting in gear, if PCM sees TPS under 20%(foot off the gas pedal) but speed is above 20MPH and RPMs above 1,500 it turns off the fuel injectors to coast without fuel use, one of the bigger advantages of fuel injection for fuel savings

 

Has the forum been hacked ?

Old members don't just start posting spam.

Do we all need to change our passwords?

 

It appears something is going on because I've now banned three accounts for this. I will reach out to the IB team and alert them.

Thanks for reporting these.