Bad ones cause surging with auto's on the freeway, manual tranny's would also benifit from the cleaning but wont notice the affects. you MAY see a slight bump in mileage as the PCM wont think your foot is mashed to the floor intermitantly anymore (no noise).
4.7 motor in my Dak... had a bad surging problem on the freeway and as we all know it's the TPS. So having nothing to loose, I yanked it out, drilled a small hole large enough to fit a spray tube for a can of CRC electronic components cleaner and sprayed it in until I felt there was enough in there to clean it... I then turned the TPS shaft several times to clean the contacts on the inside. Dried it out, slapped it back in, took it for a drive and bam... no more surging. rock solid on the freeway now.
SO now we have a fix for the TPS sensor. This will work for the 3.9/5.2/5.9/4.7 motors and probably the 3.7 & 5.7 motors as well.
When your done, put a very small piece of electrical tape over the hole and then cover the tape with silicon to keep the tape in place and to keep dirt out. I dont suggest filling the hole with silicon as if you need to access the hole again, you may push some that is in the hole into the sensor which could cause problems.
1. Remove TPS sensor from Throttle body
2. Drill a 1/8" hole in a spot where you will be able to spray in CRC Electronic Component Cleaner and the drill bit will not go in too deep too fast.
in other words... drill with a very light hand so you dont damage the contents of the sensor.
3. Spray the cleaner into the hole, dont be shy with it...
4. Rotate the sensor shaft so that the cleaner will get into the contact area's of the sensor.
5. Shake out the excess solvent until all of it is out.
6. Once your convinced it is dry, cover the hole with a very small piece of electrical tape and seal with silicon sealant.
7. reinstall sensor into the TB.
8. Reconnect the sensor electrical connector and your done.
Pics this weekend.
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Thank you very much Steve! I had a surging problem since the tranny was re-built a few weeks ago, and this fixed it! The truck also shifts a little bit better. 10 minutes and $7 is better than $70 for a new TPS!
with my luck the little pieces of plastic that drop inside from drilling the hole would cause it to stop working when I am 200 miles from home.
but it's a good quick fix.
GOD DAMNIT!!!!!!!!!!
Way to tell us now! !!!
It would be nice if you posted that when it happened to you! Instead of letting us think there is a cheap fix for a surging TPS.
It has been posted several times in the past about people's bad experiences with this mod...sorry. It's not instantaneous...mine lasted for about 6 months after the mod.
__________________
Tim
2001 SLT QCSB 4x4, 5.9L Slushbox
-Saved by Grace through Faith-
10 minutes and $7 is better than $70 for a new TPS!
They ain't $70, young whipper snapper. Advance Auto has them for $40.49, BWD with 1 year warranty. O'Reillys has them for $50.99, same exact thing except lifetime warranty.
O'Reillys also price matches, so bring a print out of Advance Auto's TPS from their website if you go.
DIY TPS sensor fix.
