TPS Full Of Oil
#2
Three Wheelin'
Most of them are by now.
You can check ohms resistance for idle switch and wot switch at LH plug to see if still on spec.
That said, I would still clean it.
Regards
Dave.
You can check ohms resistance for idle switch and wot switch at LH plug to see if still on spec.
That said, I would still clean it.
Regards
Dave.
#3
Rennlist Member
There are small o rings in the throttle body that no one ever replaces. This thread goes in depth with its replacement as that will leak oil into the TPS and cause a vacuum leak.
https://rennlist.com/forums/928-foru...-there-is.html
If it is within spec after getting oil filled I would still replace it so you don't have to worry about it again in the future.
https://rennlist.com/forums/928-foru...-there-is.html
If it is within spec after getting oil filled I would still replace it so you don't have to worry about it again in the future.
#4
Nordschleife Master
It might be possible to replace just the seals - I haven't actually tried to measure and source the seal separately - I just replaced the bearings as a unit.
#5
Rennlist Member
Roger I think has a solution to this. We all got into it a few years ago when Mike Frye did a write-up on 85/6 intake refresh. Dwayne also addressed this somehow in his S4 intake refresh writeup. I forget exactly where we all ended-up, will try to search it for you. Sounds like Hilton has most of the answer.
Bill Ball had discovered that his TPS had damage that was hidden, I think a cracked place in the metal contact spring thingy beneath the plastic. There are some posts / pics from the 2004/5/6 timeframe IIRC where he recorded his trials and tribulations over this.
I've taken a few apart, all with oil, but all seemingly working ok when metered. I thought the tps had orings itself, but maybe not. Yes, just cleaned them with WD, which is mainly mineral spirits, reassembled, no issues for mine. I think I messed with trying to manipulate the WOT trigger by bending the contacts to no reasonable solution.
Relevant threads I saved:
https://rennlist.com/forums/928-foru...le-switch.html
https://rennlist.com/forums/928-foru...-there-is.html
Bill Ball had discovered that his TPS had damage that was hidden, I think a cracked place in the metal contact spring thingy beneath the plastic. There are some posts / pics from the 2004/5/6 timeframe IIRC where he recorded his trials and tribulations over this.
I've taken a few apart, all with oil, but all seemingly working ok when metered. I thought the tps had orings itself, but maybe not. Yes, just cleaned them with WD, which is mainly mineral spirits, reassembled, no issues for mine. I think I messed with trying to manipulate the WOT trigger by bending the contacts to no reasonable solution.
Relevant threads I saved:
https://rennlist.com/forums/928-foru...le-switch.html
https://rennlist.com/forums/928-foru...-there-is.html
Last edited by Landseer; 12-26-2014 at 10:03 AM.
#6
Three Wheelin'
+1 on all the above posts.
My TPS was actually not in spec for the WOT switch anymore and I replaced, but I was really chasing down what turned into a computer problem at the time. I wasn't doing an entire intake refresh -- just chasing my tail, so I would love to get the definitive Roger solution before I take that project on.
My TPS was actually not in spec for the WOT switch anymore and I replaced, but I was really chasing down what turned into a computer problem at the time. I wasn't doing an entire intake refresh -- just chasing my tail, so I would love to get the definitive Roger solution before I take that project on.
#7
Nordschleife Master
Roger I think has a solution to this. We all got into it a few years ago when Mike Frye did a write-up on 85/6 intake refresh. Dwayne also addressed this somehow in his S4 intake refresh writeup. I forget exactly where we all ended-up, will try to search it for you. Sounds like Hilton has most of the answer.
From memory, Roger sells a more robust version with a seal on both ends, so not only does it hold vacuum in the throttle body, it also protects the bearing from ingress of dirt from the other side too.