Throttle position switch
Moderator: martauto
-
yetta
- E30 Zone Newbie
- Posts: 27
- Joined: Sun Feb 07, 2010 11:00 pm
1990 E 30 320i I have removed the TPS as it has oil inside and not getting a good reading when operated. I have tried to remove the plastic cover to clean inside as suggested in the forum, but can`t make it budge do they all come apart ? as I don`t want to break it. Thanks John
-
HJ1981
- E30 Zone Regular
- Posts: 251
- Joined: Wed Dec 19, 2018 8:24 pm
- Location: Bavaria, Germany
If you look closely, the two halves are "clipped" together, as well as some sealant around. It is similar to the sealant used to seal up the AFM cover (where you expose all the electricals).
It is "normal" for oil to get in there, it is arguably the main reason why they "fail". Take your' time, maybe use a heat gun or a blow dryer on the lowest heat setting to help.
It is "normal" for oil to get in there, it is arguably the main reason why they "fail". Take your' time, maybe use a heat gun or a blow dryer on the lowest heat setting to help.
-
yetta
- E30 Zone Newbie
- Posts: 27
- Joined: Sun Feb 07, 2010 11:00 pm
Thanks, heat gun did help still difficult to remove seemed an excessive amount of sealant. Job done including drilling small hole as recommended.
-
HJ1981
- E30 Zone Regular
- Posts: 251
- Joined: Wed Dec 19, 2018 8:24 pm
- Location: Bavaria, Germany
Anytime, it is also the same method recommended to separate the sealed headlights to really clean them properly btw.
-
Brianmoooore
- E30 Zone Team Member
- Posts: 49359
- Joined: Mon Jan 10, 2005 11:00 pm
I wouldn't try to dismantle the TPS.
Very carefully drill a very small hole in the centre (which will be at the bottom when fitted) and inject switch/contact cleaner or isopropyl alcohol through the hole, swill it about, and flush it out. This will probably need to be repeated several times, since the closed throttle switch is a miniature microswitch inside its own case, so you need to get the cleaner right inside it and flush it out.
The small hole will continue to act as a drain in the future for any more oil that gets in there.
Very carefully drill a very small hole in the centre (which will be at the bottom when fitted) and inject switch/contact cleaner or isopropyl alcohol through the hole, swill it about, and flush it out. This will probably need to be repeated several times, since the closed throttle switch is a miniature microswitch inside its own case, so you need to get the cleaner right inside it and flush it out.
The small hole will continue to act as a drain in the future for any more oil that gets in there.