 Deceleration Valve |
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| Ian Stott |
 Dec 30 2019, 07:41 AM
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#1
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Senior Member  Group: Members Posts: 907 Joined: 28-January 08 From: Moncton/Canada Member No.: 8,635 Region Association: Canada  |
This is a very difficult to get item to get! Many have said soaking the existing one in kerosene for a few days will do the trick, have not done that yet as I am still trying to track down a new one. Wondering what the success rate has been with soaking it in kerosene, also wondering would WD 40 do the same thing. Would hate to ruin the one I have, which is original to the car!
Ian Stott Moncton Canada |
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| Rand |
Jan 3 2020, 02:08 PM
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#2
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Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
It's like an appendix. You could just remove it and not care.
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| ClayPerrine |
Jan 5 2020, 07:38 PM
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#3
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Life's been good to me so far..... Group: Admin Posts: 15,948 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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QUOTE(Rand @ Jan 3 2020, 02:08 PM)  It's like an appendix. You could just remove it and not care. Bad move. The decel valve opens when you close the throttle at high RPMs. It leans the mixture, and also it acts as a dashpot, keeping the RPMs up so the engine doesnt die under decel. And all of the 1.8L engines had them. Brad is an expert on the D-Jet system, and I will always defer to him on it. He has studied it extensively. I don't believe he has studied the L-Jet system as extensively. I have worked on them for 34 years, and every one I have worked on, as well as the PET parts manual, lists a decel valve for both years of the L-Jet system. And the only difference between the ones for D-Jet and L-Jet is the adjustment setting. |
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| porschetub |
Jan 6 2020, 02:04 PM
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#4
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Advanced Member Group: Members Posts: 4,750 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(ClayPerrine @ Jan 6 2020, 02:38 PM) QUOTE(Rand @ Jan 3 2020, 02:08 PM) It's like an appendix. You could just remove it and not care. Bad move. The decel valve opens when you close the throttle at high RPMs. It leans the mixture, and also it acts as a dashpot, keeping the RPMs up so the engine doesnt die under decal. (IMG:style_emoticons/default/agree.gif) good description,my understanding is the L-jet TB's that have only one vacuum port (retard) so that valve would be essential to stop stalling when the throttle is fully closed after acceleration ,right ? So it serves the above function and also helps to reduce emissions when the throttle is closed @ the same time ?. Cheers. |
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Posts in this topic
Ian Stott Deceleration Valve Dec 30 2019, 07:41 AM
bdstone914 @Ian Stott
For L jet or D jet ?
Can you post t... Dec 30 2019, 08:07 AM
Ian Stott
@Ian Stott
For L jet or D jet ?
Can you post ... Dec 30 2019, 09:07 AM
Mark Henry
@Ian Stott
For L jet or D jet ?
Can you post ... Jan 3 2020, 08:56 AM Ian Stott
@Ian Stott
For L jet or D jet ?
Can you post... Jan 3 2020, 11:28 AM bdstone914
[quote name='Mark Henry' post='2774370' date='Jan... Jan 3 2020, 11:37 AM Ian Stott
[quote name='Mark Henry' post='2774370' date='Ja... Jan 3 2020, 12:12 PM Ian Stott I thought I would bring this back to the top, as I... Dec 31 2019, 11:19 AM timothy_nd28 I was alittle confused reading what you were doing... Dec 31 2019, 11:54 AM Highland Have you tried turning the adjustment screw to loo... Dec 31 2019, 03:36 PM dr914@autoatlanta.com we try the wd40 first then buy a used one Dec 31 2019, 04:24 PM Ian Stott
we try the wd40 first then buy a used one
Do you... Jan 1 2020, 09:45 AM 914werke RE: Deceleration Valve Dec 31 2019, 05:29 PM cary I have 2 soaking in kerosene right now. I'll d... Jan 1 2020, 11:04 AM Ian Stott
I have 2 soaking in kerosene right now. I'll ... Jan 2 2020, 12:12 PM cary
I have 2 soaking in kerosene right now. I'll ... Jan 3 2020, 02:03 PM rjames :popcorn:
I’ll be interested in your results.
I... Jan 1 2020, 12:24 PM Rand I'm curios if you understand why you need it? ... Jan 2 2020, 01:42 PM Ian Stott
I'm curios if you understand why you need it?... Jan 3 2020, 06:05 AM GregAmy It doesn't "control the vacuum" (if ... Jan 3 2020, 07:10 AM Ian Stott
It doesn't "control the vacuum" (if... Jan 3 2020, 07:28 AM GregAmy OK, so if it's an L-Jet like Mark says, and th... Jan 3 2020, 12:42 PM porschetub
OK, so if it's an L-Jet like Mark says, and t... Jan 3 2020, 03:01 PM porschetub
OK, so if it's an L-Jet like Mark says, and t... Jan 5 2020, 01:56 PM Mark Henry Ian has a '74 Ljet, complete system and dizzy ... Jan 3 2020, 01:11 PM Ian Stott I appreciate all who chimed in, would like to know... Jan 3 2020, 02:01 PM wonkipop
[quote name='ClayPerrine' post='2775014' date='Ja... Mar 30 2022, 08:01 PM GregAmy I don't know the L-Jet system...but Bruce says... Jan 3 2020, 02:09 PM rjames If the car is backfiring it’s not the decel valv... Jan 3 2020, 04:27 PM Bleyseng My 77 Baywindow Westy has the Ljet with that Decel... Jan 4 2020, 10:29 AM JawjaPorsche One for sale on eBay
https://www.ebay.com/itm/Por... Jan 5 2020, 05:06 PM porschetub Classic bad ebay listing ,not the unit we are talk... Jan 5 2020, 06:31 PM rjames Reviving a bit of an old thread and maybe this is ... Aug 21 2020, 12:40 PM RandyE
This is a very difficult to get item to get! ... Mar 5 2022, 09:18 PM Van B Randy, I posted about this in a different thread r... Mar 6 2022, 05:28 PM StarBear @Van [b]@[url=http://www.914world.com/bbs2/inde... Mar 30 2022, 01:01 PM Van B The parts manual can be a little weird on our cars... Mar 30 2022, 02:56 PM StarBear Thanks, @Van B! Mar 30 2022, 03:10 PM wonkipop @Van B
the EGR on the 75 (calif) works off the v... Mar 30 2022, 04:30 PM Van B
[b]@[url=http://www.914world.com/bbs2/index.php?s... Mar 30 2022, 05:18 PM wonkipop
[b]@[url=http://www.914world.com/bbs2/index.php?... Mar 30 2022, 07:09 PM emerygt350 Egr is actually a really cool (literally) addition... Mar 30 2022, 06:21 PM wonkipop
Egr is actually a really cool (literally) additio... Mar 30 2022, 07:14 PM |
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