 Throttle Body Return Spring, Operation changed while adjusting timing |
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| FlacaProductions |
 May 10 2023, 07:21 PM
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#1
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Senior Member  Group: Members Posts: 1,584 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California 
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Setting timing the other day and using my left thumb on the throttle body return spring arm.
After a while, when attempting to rev, it felt like it was slipping on the shaft and would no longer rev unless i actually pulled on the throttle cable. The spring still does it job as usual and before - but what happened with being able to rev it with my thumb on the spring arm? What am I missing? |
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| Superhawk996 |
May 11 2023, 06:30 AM
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#2
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914 Guru Group: Members Posts: 5,822 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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Worn throttle shaft started binding? I’m speculating of course.
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| FlacaProductions |
May 11 2023, 09:16 AM
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#3
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Senior Member Group: Members Posts: 1,584 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California
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Yeah - i dunno. It was odd. I was focused on the timing and when I got done with that, didn't have time to go back and look at this and was wondering about it since. Away from the 914 for a number of weeks now...i'll be noodling this around....
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| rfinegan |
May 11 2023, 12:19 PM
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#4
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Senior Member Group: Members Posts: 973 Joined: 8-February 13 From: NC Member No.: 15,499 Region Association: MidAtlantic Region
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Sounds like its was sticking before and now is free to work
Only the arm with the Cable is attached to the throttle plate. The Other makes contact on the Return stroke to help close the throttle plates/arm 2 pieces  |
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| FlacaProductions |
May 11 2023, 12:43 PM
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#5
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Senior Member Group: Members Posts: 1,584 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California
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That's interesting - thank you!
Not often that I get to "break" something back to the way it should be! |
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| JamesM |
May 11 2023, 01:45 PM
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#6
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Senior Member Group: Members Posts: 1,900 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
QUOTE(FlacaProductions @ May 10 2023, 05:21 PM)  Setting timing the other day and using my left thumb on the throttle body return spring arm. After a while, when attempting to rev, it felt like it was slipping on the shaft and would no longer rev unless i actually pulled on the throttle cable. The spring still does it job as usual and before - but what happened with being able to rev it with my thumb on the spring arm? What am I missing? Assuming you have the later throttle body with an integrated return spring vs the early throttle body where the return spring arm is one solid piece connected to the throttle cable as well? |
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| FlacaProductions |
May 11 2023, 02:18 PM
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#7
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Senior Member Group: Members Posts: 1,584 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California
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Right - it's a 74 so i can't see why it's not a late version....
It all works fine - it was just the change that threw me off. |
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