Found empty vacuum hose connection, What did it hook to? |
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Found empty vacuum hose connection, What did it hook to? |
SVG223 |
Feb 19 2022, 12:59 AM
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#1
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Newbie Group: Members Posts: 35 Joined: 6-February 22 From: Benton Arkansas Member No.: 26,317 Region Association: None |
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SVG223 |
Feb 19 2022, 02:23 PM
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#2
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Newbie Group: Members Posts: 35 Joined: 6-February 22 From: Benton Arkansas Member No.: 26,317 Region Association: None |
You guys are great! That JeffBowlsby link even tells me the size hose it needs! The deceleration valve is there. What is strange is I got the car from a classic car dealer in Houston where they did a tune-up on the car before I bought it. The car takes a while to warm up, like it's a little lean, wants to die when backing out of the driveway. After it warms up it is fine. The tires are a little tall not sure if that is contributing 205/70-15.
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wonkipop |
Feb 19 2022, 04:10 PM
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#3
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Advanced Member Group: Members Posts: 4,420 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
You guys are great! That JeffBowlsby link even tells me the size hose it needs! The deceleration valve is there. What is strange is I got the car from a classic car dealer in Houston where they did a tune-up on the car before I bought it. The car takes a while to warm up, like it's a little lean, wants to die when backing out of the driveway. After it warms up it is fine. The tires are a little tall not sure if that is contributing 205/70-15. if it is anything like an L jet the warm up weak idle might be due to the AAV (aux air valve). ie its closing too quick or not opening at all for extra intake air when the engine is cold. |
SVG223 |
Feb 19 2022, 05:13 PM
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#4
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Newbie Group: Members Posts: 35 Joined: 6-February 22 From: Benton Arkansas Member No.: 26,317 Region Association: None |
You guys are great! That JeffBowlsby link even tells me the size hose it needs! The deceleration valve is there. What is strange is I got the car from a classic car dealer in Houston where they did a tune-up on the car before I bought it. The car takes a while to warm up, like it's a little lean, wants to die when backing out of the driveway. After it warms up it is fine. The tires are a little tall not sure if that is contributing 205/70-15. if it is anything like an L jet the warm up weak idle might be due to the AAV (aux air valve). ie its closing too quick or not opening at all for extra intake air when the engine is cold. This sounds about right, I bet it's not opening at all. It dropped to 500rpm Ice cold when I covered the hole. Maybe I can take it off and soak it in something. |
wonkipop |
Feb 19 2022, 05:21 PM
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#5
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Advanced Member Group: Members Posts: 4,420 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
You guys are great! That JeffBowlsby link even tells me the size hose it needs! The deceleration valve is there. What is strange is I got the car from a classic car dealer in Houston where they did a tune-up on the car before I bought it. The car takes a while to warm up, like it's a little lean, wants to die when backing out of the driveway. After it warms up it is fine. The tires are a little tall not sure if that is contributing 205/70-15. if it is anything like an L jet the warm up weak idle might be due to the AAV (aux air valve). ie its closing too quick or not opening at all for extra intake air when the engine is cold. This sounds about right, I bet it's not opening at all. It dropped to 500rpm Ice cold when I covered the hole. Maybe I can take it off and soak it in something. not a D jet man, but i'd guess the rev drop is because the idle is set currently with that extra air entering via the open port. its like you have an idle port without the adjustment screw. you will need to reset your idle with that port blocked or correctly connected to decel. advice to cap the port for now if you can't hook up to decel valve is good. its only a small port but its sucking in unfiltered air and ........dust/dirt. you can run L jet without the decel. but i hear D jet needs it. as advice above says. EDIT - you will need the car fully warmed up to reset steady idle. then you can address the weak start up idle at cold. the AAV is an older style on the D jets and i don't know much about them. i'm currently investigating a weak AAV on my L jet. its really only a bug bear on cold start and i kind of put up with it for now. not much you can do with the AAVs on L jet except clean them out. but the "springs" (electric heated coil) do go weak with age. i assume D jet AAVs suffer similarly. |
ClayPerrine |
Feb 19 2022, 06:23 PM
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#6
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Life's been good to me so far..... Group: Admin Posts: 15,543 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
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wonkipop |
Feb 19 2022, 06:29 PM
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#7
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Advanced Member Group: Members Posts: 4,420 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
you can run L jet without the decel. but i hear D jet needs it. as advice above says. Not true. You really need the decel valve in the L-Jet to keep it from dying when the throttle snaps closed. Clay yeah - i don't seem to have that problem clay. and its been like that for 33 years. has a fuel pressure regulator subbed in as a visual emission cheat done by original owner. but i've been thinking about what you say and i figure it might have something to do with all the slight variations on L jet we found after mr bolwsby prompted the search for the EC-A, EC-B versions of 74 that lead to the two different versions in 75. i've got the version with the vac advance hook up off the distributor to the throttle body. the EC-B 49 state car of 74. i'd have to think about it more but i wonder if this does not make it come down so savagely without the decel. the L jets without that hook up might behave slightly differently. anyway its never been a problem on mine, though i have a decel sitting around now and just have to tweak the bracket and test it to put it in. when i get around to it i'll report to you on the difference. |
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