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what part is this?

Oxygen

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i was just cleaning the engine bay and i noticed one of the screws (top one) on this part (i think its a TPS or some sort of sensor i'm assuming) is stripped ... the bottom screw looks stripped too but it actually comes off with a philips head ..

does this part go often? or should i not be concerned about the stripped screw?

IMG01053.jpg

IMG01052.jpg
 



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Maniak

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Yes, that is the TPS, and They do go bad, but not often.. I'm on the 3rd one on our '92 explorer which has 380k miles on it. I'd say its a 200k mile part.

Also, those screws look like square drives, not stripped phillips. At least that what I see in the pic. I've never seen square drives on an engine before but they are common on deck screws and even to hold panels on in conversion vans.

~Mark
 






Oxygen

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ahh i see .. what does the TPS actually do?
 






Maniak

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The Throttle position sensor (TPS) senses the position of the throttle :D Sorry, I just couldn't resist that...

Basically, it lets the computer know how far open the throttle is, or how hard your pushing on the gas.

~Mark
 






Oxygen

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haha ya ya .. jokes on me lol

that's what i figured, just making sure..

how would one know when that part goes bad?
 






Maniak

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If it goes out of range, it will throw a code.

I know on our '92, we were getting a very bouncy idle. Turned out the TPS voltage was bouncing, so we replaced it. I replaced it again when we rebuilt the motor.. I tried to change all the sensors at that point since I was rebuilding.

I don't know what symptom it will give on a newer X, but I'd "assume" it would throw a code sooner since the ODB-II computers have much more info and can tell when things are out of whack.

~Mark
 






Oxygen

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oh ok, so it won't leave me stranded.. good to know!
 






2000LXS

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It tells the transmission how hard to shift and at what speed.
Mine went dead and I thought my tranny was going.
 






2000LXS

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Oh and those screws are stripped I had to use and impact driver to get mine out.
 






Oxygen

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really? didn't know that it somewhat controlled the transmission
 






Maniak

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Actually, the computer controlls the trans but one of the sensors the ECM uses for fuel/ignition and trans control is the throttle position sensor, along with a whole slew of other sensors too.

~Mark
 






Oxygen

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easy to change one of these things? i found some on eBay for around $30-40 shipped.. it wouldn't hurt to change it right?
 






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