A month or so ago,my tranny had to have a solenoid replaced.its acting up again,(not as bad or often as first time).anyways my wife brought ruck back to tranny guy,he took for ride and told her the tps needs to have volt meter hooked up/checked and adjusted.I tried calling the guy but no luck getting him.what is he talking about.?oh,the tranny acts like someone driving stick for first time.thanks all.

 

Pull the codes!!!

 

I read on here while back about that,but I wasn't sure if it is adjustable.according the tranny guy it is.

 

There is no adjustment unless you elongate the mounting holes. If the TPS closed throttle output voltage is not in range, replace it. Playing games by trying to force the TPS voltage output is masking another problem.

 

The only thing that would put the voltage back in the ballpark range is by moving the throttle stop screw.
This screw should not be moved from the factory setting but if your voltage is off maybe someone that did not know what he was doing turned it.
This is not an easy adjustment to put back to the factory setting once it is turned. Just turning the screw to put the voltage where want it or to adjust the idle speed is not the way to do it.

By the way what are we working with (year, transmission type, engine size, F-series)?

There are only three voltages from the TPS, CT, PT & FT.

Closed Throttle can be anywhere between 0.6-1.0 volts
Part Throttle is triggered @ 0.04 volts above Closed Throttle
Full Throttle is triggered @ 2.71 volts above Closed Throttle

So the PCM Computer only has three paths to go down with the information from the TPS as far as operating the transmission.
So as along as your TPS voltage goes from somewhere in the CT range and moves smoothly all the way into the FT range with no jerks on the needle of the VOM as it goes up the scale the TPS is OK as far as TP voltage for the operation of the transmission from the computers stand point. I would not use a DVM or DMM for these tests just a cheep analog VOM. So never touch the throttle when starting the engine as if you do you will mix up the computer as it will take this voltage as the CT voltage and do its math off of that voltage for all further operations of the engine and transmission.

 

The truck is 93 f 250 4*4,auto 460.like I had said before,about a month ago taking off from stop it would act like a newbie driving a stick shift.that bucking action.I took to local tranny guy,he replaced some solinoid in there worked great,till last week.its no where near as bad.wife took it back to him yesterday,they both went for ride and he said its (I'm calling)tps.when I got home she pointed to switch looking thing on right hand side of fuel injection towards top.I looked threw manual and came up with tps.any more info needed ill do my best to pass along.thanks all

 

I have used a DVM, digital voltmeter, to measure the TPS output voltage. Set the voltage range manually, slowly open the throttle, Key On Engine Off, then watch the output signal. Bill suggestion of using an analog meter is based on a DVM can be deceiving if you are not aware of it's tendency to average the output and switch to different voltage ranges if left in auto mode. The analog meter is also much better at displaying any "dips or peaks" in the output signal. The problem is finding an analog meter these days....

I borrowed a photo from subford:


This is a photo Bill has of the 7.5L engine in his motorhome. Your truck should be the same but the view perspective is from above, not from the front of the truck.

I also highly suggestion you or someone else check for codes as Conanski previously stated.

For reference:

Fuel Injection Technical Library » Throttle Position Sensor (TPS)

 

Yes that red arrow is what I'm talking about.ill read up on it more,but reading this ill prolly bring to a mechanic to hook on his computer.