They probably ordered one for a 4.7L.

TPS sensors can be measured by voltage with a Multimeter at idle and WOT positions to see if they are within spec.
If the garage had properly diagnosed it, they would have done so and in the process realized the TPS was not removable.
What they did was spend 5min with their scan tool to read the code and call it a day. Charge you $100 or whatever their fee is and order up a part.
You could buy a scan tool for half that to read a code, better yet, advance auto or Autozone will do it for free.
I'd argue the fee.

 

I think on the 2008 5.7 its integrated in the throttle body. Anyway the throttle body is not that expensive for the 5.7.

 

Correct and both accounts... just buy a new one and swap them... should be good to go after that.

 

They put a new sensor in the mass air flow and the trucks still doing it im about ready to have the truck towed to the dealer soon guess they dont know what the problem is.The trucks an 03 not a 08 I priced a new tb 200 bucks on e bay.

 

holy crap...

 

What symptoms lead you to believe you had a bad TPS sensor to begin with....?

I also have to say that I don't think the shop you went to knows a damn thing about what's going on yet....

I'm assuming since you had it towed that it won't start...?

A faulty MAF sensor would not cause a no start condtion, the PCM would simply run in Limp Mode throw some nasty DTCs and run like garbage... It would be reading from the IAT and the Upstream O2 sensor and run a base timing map, and likely run with a target A/F ratio of like 11.0-12.0... just my thoughts on the matter.

Can you tell us exactly what was going on so we might be able to better point you (or your shop) in the right direction...?

 

Not sure where you have the vehicle but all the TPS sensor code recommend certain diagnostics before replacing anything. It could be the throttle body but it could be electrical problem in the wiring or the PCM. The service manual diagnostic steps help to determine which one but the mechanic needs the right tools and diagnostic ability to perform the tests.

 

Im just going by what you guys are telling me the truck will not stay running it starts up fine but the idle jumps up and down and then as soon as you put the truck in drive it the idle goes so low stals out it will even stall out and die if the trucks in park the idle is all over the place up and down.I think the dealer would of had it fixed by now.thats why I have to have it towed and wont stay running.shops had my truck for a week and they don't have it fixed im pretty mad.the truck has 2 brand new 02 sensors.

 

That situation can be caused by a few things... most common are (not in any order):

Faulty Intake air temperature (IAT) Sensor
Malfunctioning Throttle Body
Malfunctioning Throttle Position Sensor (attached inside the Throttle Body, non-servicable)
Faulty Crankshaft Position Sensor (aka Crank Angle Sensor)
Faulty UPSTREAM Oxygen Sensor (downstream has zero impact on air furl mixture)
Faulty Ignition Coil(s)
Fouled/Damaged/Faulty Spark Plugs
Vacuum Leak
Cracked Intake Manifold (would cause idle to skyrocket up though)
Short Circuit to PCM or bad PCM Programming

Those are the most common issues I've seen causing bad idle and stalling as you describe.

If you were able to get the truck to run normally after it warmed up (by you pressing the throttle down until it warmed up) and it idled normally, I'd be more inclined to think it was sensor or PCM related.

So without more diagnostics it would be hard for me to tell you what's wrong.

 

I think you need to move it to a dealership. The scaring part is how much are they going to want to get from you.