How to open Tps switch
Thread Starter
Race Car
Joined: Dec 2006
Posts: 4,089
Likes: 6
From: Tampa Florida
How to open Tps switch
85 Euro LH:
I have no contact on my WOT portion of my tps switch, off throttle works fine I get continuity. Seems like it maybe glued any advice on how to get it apart?
I have no contact on my WOT portion of my tps switch, off throttle works fine I get continuity. Seems like it maybe glued any advice on how to get it apart?
Under the Lift
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: Mar 2002
Posts: 18,648
Likes: 52
From: Buckeye, AZ
Sure, it's easier to replace it, but for all you DIY'ers like me, there is a seam around the circumference. Saw along that with a hacksaw, but not all the way through to the inside. There are some tabs along this seam. Best not to saw into them but gently pry them away from the case a little with a very small flat-blade screwdriver. You will hear the glue separate. Pry along the seam gap you created with the hacksaw and the rest of the glue should gradually give up its hold. The connector will stay with the base half - don't saw that. Anyway, with a little patience the case will separate in such a way that a lip on the base inside the seam stays largely intact so it can be reassembled very securely with fresh glue. The main area that needs attention is the solder joints at the base of the WOT points arms. I just reflow them with a little more solder. Might as well do the idle switch solder joint too. I advocate this repair only because I have seen new units fail within a year or so and it appears the factory soldering of these butt joints is not the best.
Under the Lift
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: Mar 2002
Posts: 18,648
Likes: 52
From: Buckeye, AZ
Once you remove the two screws from the switch's baseplate adjustment slots, the switch should slide off the throttle plate shaft. I'm not sure what you mean by "nut on the spring side".
Trending Topics
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner
Joe Kucinski
This Builder Is Turning Heads With Its Slantnose 911 Creation
Verdad Gallardo
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
Thread Starter
Race Car
Joined: Dec 2006
Posts: 4,089
Likes: 6
From: Tampa Florida
I got it back on but notice the spring tension is not strong enough to completely close the plate. If I manually move it the off switch will click, weak springs or an adjustment.
Thread Starter
Race Car
Joined: Dec 2006
Posts: 4,089
Likes: 6
From: Tampa Florida
I have cleaned it, just very little tension sometimes it will not go to the fully closed position. Off the car it closes very little resistance but add a little pull form any of the throttle cables and it does not close consistently. This would explain some odd running issues. I'm not sure what to do at this point!
Nordschleife Master
Joined: Jun 2006
Posts: 6,297
Likes: 63
From: ɹəpun uʍop 'ʎəupʎs
Is there any slack adjusted into your throttle cables? If they're too tight, it might not close compeltely?
Or are the cables just binding in the sleeve? Once they're old, friction destroys the nylon lining and they take more force. You can use a motorcycle cable oiler to spray a lube down the cable, but replacement is the longer-lasting option.
Or are the cables just binding in the sleeve? Once they're old, friction destroys the nylon lining and they take more force. You can use a motorcycle cable oiler to spray a lube down the cable, but replacement is the longer-lasting option.
I have cleaned it, just very little tension sometimes it will not go to the fully closed position. Off the car it closes very little resistance but add a little pull form any of the throttle cables and it does not close consistently. This would explain some odd running issues. I'm not sure what to do at this point!
Thread Starter
Race Car
Joined: Dec 2006
Posts: 4,089
Likes: 6
From: Tampa Florida
I went over the cables and the Gas pedal cable was screwed all the way out. Also the rug was down on the pedal and causing an issue. I need to look into what type of spring is used on the pedal it seems it has a lot less resistance than my 86. It's working for now but seems a little too touchy for me.
Thread Starter
Race Car
Joined: Dec 2006
Posts: 4,089
Likes: 6
From: Tampa Florida
Engine is back together and idles high unless I push the TB arm mechanism down then it idles ok. Not sure what went wrong I did take it apart to clean the springs and plate. We are talking a couple of MM and the low switch is clicking even with out pushing down. I guess I need to pull it out again but not sure what to look for could the springs be weak. It did idle ok before I had it apart but it moved fine an no binding.