 Idle bleed screw on 73 2.0, Does it close? |
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| emerygt350 |
 Nov 19 2021, 02:02 PM
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#1
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Advanced Member  Group: Members Posts: 2,132 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States  |
Wondering if the idle screw should be capable of completely closing off the air bleed. I noticed today that when mine is screwed All the way in it still allows air through the channel. If I put my thumb over the channel the idle drops another 200 rpm.
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| rjames |
Nov 19 2021, 04:02 PM
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#2
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I'm made of metal Group: Members Posts: 3,948 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest 
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QUOTE(emerygt350 @ Nov 19 2021, 12:02 PM)  Wondering if the idle screw should be capable of completely closing off the air bleed. I noticed today that when mine is screwed All the way in it still allows air through the channel. If I put my thumb over the channel the idle drops another 200 rpm. I think that's pretty typical, either because it's worn or just not machined such that it doesn't completely close. At least that's the case on my original high mileage '75 TB and another NOS '73 throttle body I bought a while back. I keep planning to modify mine so it fully seals, but haven't gotten around to it yet. |
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| emerygt350 |
Nov 19 2021, 04:08 PM
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#3
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Advanced Member Group: Members Posts: 2,132 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
I would like to do that as well. Any idea what massaging would allow it to seal?
I made the mistake of cleaning it and now it is worse .... |
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| iankarr |
Nov 19 2021, 06:00 PM
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#4
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,480 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region
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When I fully close my bleed screw the engine dies.
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| JeffBowlsby |
Nov 19 2021, 06:28 PM
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#5
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914 Wiring Harnesses Group: Members Posts: 8,524 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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QUOTE(iankarr @ Nov 19 2021, 04:00 PM) When I fully close my bleed screw the engine dies. (IMG:style_emoticons/default/agree.gif) Thats the way it should be, the engine should die with no intake aire source. Otherwise you have a free air leak somewhere in the intake that overrides the air bleed screw function. |
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| emerygt350 |
Nov 19 2021, 06:50 PM
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#6
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Advanced Member Group: Members Posts: 2,132 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Yeah, if I thumb over the bleed port and the hole in the butterfly, the engine dies.
So i take it my condition is not 'stock' then. I would like to fix this.... |
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| rjames |
Nov 19 2021, 08:16 PM
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#7
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I'm made of metal Group: Members Posts: 3,948 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest
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QUOTE(JeffBowlsby @ Nov 19 2021, 04:28 PM) QUOTE(iankarr @ Nov 19 2021, 04:00 PM) When I fully close my bleed screw the engine dies. (IMG:style_emoticons/default/agree.gif) Thats the way it should be, the engine should die with no intake aire source. Otherwise you have a free air leak somewhere in the intake that overrides the air bleed screw function. The leak is from the bleed screw port. For some at least, screwing it in all the way doesn’t fully seal it. |
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| emerygt350 |
Nov 20 2021, 09:33 AM
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#8
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Advanced Member Group: Members Posts: 2,132 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Plugged it with some hot glue gun action...
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| emerygt350 |
Nov 20 2021, 04:03 PM
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#9
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Advanced Member Group: Members Posts: 2,132 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Held up nicely 2 hours on the freeway and 10 pulls at the Dyno. Can recommend.
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| emerygt350 |
Nov 20 2021, 04:12 PM
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#10
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Advanced Member Group: Members Posts: 2,132 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Anyone have a link to the business that rebuilds the throttle body? I tried searching but nothing came up.
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| adolimpio |
Nov 20 2021, 04:19 PM
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#11
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Art Group: Members Posts: 182 Joined: 10-March 10 From: Greenwood SC Member No.: 11,449 Region Association: South East States
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QUOTE(emerygt350 @ Nov 20 2021, 06:12 PM) Anyone have a link to the business that rebuilds the throttle body? I tried searching but nothing came up. This guy rebuilds them - Phil |
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| emerygt350 |
Nov 20 2021, 06:03 PM
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#12
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Advanced Member Group: Members Posts: 2,132 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
QUOTE(adolimpio @ Nov 20 2021, 05:19 PM) QUOTE(emerygt350 @ Nov 20 2021, 06:12 PM) Anyone have a link to the business that rebuilds the throttle body? I tried searching but nothing came up. This guy rebuilds them - Phil Thanks! Winter is coming.... |
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