 Replaced TPS board, What a difference in performance! |
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| oakdalecurtis |
 Dec 14 2016, 05:59 PM
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#1
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Oakdalecurtis  Group: Members Posts: 1,325 Joined: 5-June 15 From: Oakdale, Ca Member No.: 18,802 Region Association: Central California 
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My 76 2.0 always ran pretty well, passes smog every two years. But the engine did miss sometimes at different rpm's, but usually under load more in lower gears. It has a Crane ignition, new plugs, wires, tuned fine. I finally ordered a TPS board from 914Rubber and replaced it. By the way, when I pulled the throttle body, there was no gasket or sealant present, just metal to metal! This lack of a gasket here probably gave me a small vacuum leak all along. Here's a picture of my old board. It was a little tricky drilling out the existing TPS board rivets and reinstalling the new ones. One of the rivets is under the contact fingers making it difficult to get to. With the job done, I just took the car out for a test drive. The engine started and ran flawlessly without a single miss that I could detect! It's never run like that since I got it 20 years ago. I wish I had done this repair years ago. If you're trying to fix erratic ignition missing, I would recommend replacing your TPS early in the diagnostic process and make your engine run smoothly!
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| ConeDodger |
Dec 14 2016, 06:21 PM
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Apex killer! Group: Members Posts: 23,587 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California
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Nice!
I've got one of those sitting around but I don't have a 4 cylinder! (IMG:style_emoticons/default/blink.gif) |
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| second wind |
Dec 14 2016, 10:34 PM
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#3
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Senior Member Group: Members Posts: 854 Joined: 30-December 10 From: Los Angeles, California Member No.: 12,543 Region Association: Southern California
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would love to do that but as'cared marshall.....how about a photo walk thru of the process....one million thank yous!!!!
gg |
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| oakdalecurtis |
Dec 14 2016, 10:56 PM
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#4
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Oakdalecurtis Group: Members Posts: 1,325 Joined: 5-June 15 From: Oakdale, Ca Member No.: 18,802 Region Association: Central California
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It is a delicate operation. You must always be aware of the little contact fingers and not bend or damage them. It's not hard to drill the rivets out if you have a small drill press and clamp the sensor board where it's flat to the edge of the drill table to hold it still. Be sure you control drill depth when drilling out the rivet that's under the silver contact arms or you will push the drill through too far and bend them. You will have to remove the circular ring clip at the top of the rotating arm to remove the arm, which then allows you to lift off the big square metal plate to work on to remove the board. When you install the rivet under the silver arms, you will push the arm up a little, but it will spring back when you set the rivet. Here's a YouTube video of the process, see if that helps. Be patient. Good luck, it's well worth it if your engine stumbles or misses at all.
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| Mikey914 |
Dec 14 2016, 11:32 PM
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#5
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The rubber man Group: Members Posts: 12,667 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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Gary Cotton made an excellent 2 part video with in depth details and explanation.
These links are also on my site Thanks Gary https://m.youtube.com/watch?v=6x4TBwXlJu4 |
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| oakdalecurtis |
Dec 14 2016, 11:35 PM
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#6
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Oakdalecurtis Group: Members Posts: 1,325 Joined: 5-June 15 From: Oakdale, Ca Member No.: 18,802 Region Association: Central California
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QUOTE(Mikey914 @ Dec 14 2016, 09:32 PM)  Gary Cotton made an excellent 2 part video with in depth details and explanation. These links are also on my site Thanks Gary https://m.youtube.com/watch?v=6x4TBwXlJu4 Thanks Mikey, I forgot to post the links to the video! Getting old..... |
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