Tps

[Poorboy64]

On my way home from work Friday gave it a little gas to kick down the the transmission, no-go check engine lite came on, limped home no power, checked codes, P0120 TPS, replaced TPS all is great, What i did notice the past few months was my throttle response was all over the place, at time I had to bury the throttle to get it to kick down going up an incline,
I tried adj. throttle cable, tried ordering a throttle cable, (No Luck) could it be that these sensors degrade after so many miles and it's as simple as that?
No cable replace or adjust?
Also performed the drive shaft slip yoke service using the Ford TPFE grease,
What a difference! It was unreal the gunk/old grease i got out of the joint when I removed the zerk fitting and pushed cleaner & rag down the joint/spline.
Just thought I would share,

 

[theriddler]

Did you use an OEM TPS sensor? May unhook your battery and do a computer reset or find a parts store that's friendly with returns...that way you can buy another and try it out, if it doesn't fix the problem return it.

I've heard that throttle cable loosening could be due to a rubber bushing under the accelerator pedal that's wore out, you may investigate that. Was the connector for the TPS clean or possibly corroded? Sounds like a good time to use that PWR/ECT button if I've ever heard one but you shouldn't have to, something definitely wrong somewhere. What year do you have...pre '01 I assume?

 

[Poorboy64]

Sorry if I miss communicated . I did use OEM, and it fixed the problem,
It was such a drastic improvement, I was thinking if these sensors can start to degrade and give poor performance even if the are within spec. When I tested mine in was intermitant.

Thanks
Bill

 

[theriddler]

it's very very unusual for an oem sensor to fail that early but stranger things have happened. I'm not much help on this one, sorry. I did have an unusual thing happen with a '99 i used to have. I went to car wash and lightly rinsed the engine off. On the way home it would only shift gears at 4-5k rpms. Turned out to be the tps sensor.

Sounds like the opposite of your problem but closely related...maybe someone else can chime in.

 

[LittleCaesar]

I changed out my original OEM TPS (99) after 18 years due to getting a new OEM for a price of $25. No other reason.

The difference between the new and old was apparent in the shifts of the transmission, those shifts were quicker.

 

[Gary Blake]

Just replaced my TPS on my 2000 3.4 5 speed.
I was having a problem with a very intermittent miss in the engine for a couple of years that would never throw a code to give me a clue. Regular tune ups, oil changes etc were all done but the miss persisted. Problem was it was so intermittent and it would not repeat for any kind of testing. It finally started getting a little worse but would still not throw a code.
At least it became a little more predictable and I finally tracked the miss down to the TPS with the help of an ELM Bluetooth dongle and Torque app live data.
Couple of days in now and the miss appears to have disappeared.
Fingers crossed but I think the TPS had been slowly deteriorating for a couple of years and was the cause of my mystery intermittent miss.

Gary