 Convert back to D Jet Fuel Injection-, Vacuum Line questions |
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| young55961 |
 Jun 20 2026, 01:14 PM
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#1
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Newbie  Group: Members Posts: 41 Joined: 15-March 18 From: Arcadia Member No.: 21,972 Region Association: Southern California  |
I’m working on the vacuum hoses and have a few questions.
1. **Cold Start Valve:** I believe the larger port connects to the Auxiliary Air Regulator (AAR). Where does the smaller port connect?  2. I’m missing the EGR valve, all of the metal vacuum lines, and the deceleration valve. Does that matter? Can I start the engine without them? 3. What is the middle port on the fuel rail for? Where should it be connected?  |
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| Montreal914 |
Jun 20 2026, 01:59 PM
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#2
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Advanced Member Group: Members Posts: 2,146 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California 
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| young55961 |
Jun 20 2026, 02:24 PM
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#3
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Newbie Group: Members Posts: 41 Joined: 15-March 18 From: Arcadia Member No.: 21,972 Region Association: Southern California |
QUOTE(Montreal914 @ Jun 20 2026, 02:59 PM)  picture... I have a middle port on each fuel rail. Should I use a T-fitting to connect them together? I'm not sure what the purpose of these ports is. Are they for vacuum or pressure relief? Also, what about my second question? Do I need the EGR valve and the metal lines, or can I run the engine without them? Tks. |
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| young55961 |
Jun 20 2026, 02:50 PM
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#4
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Newbie Group: Members Posts: 41 Joined: 15-March 18 From: Arcadia Member No.: 21,972 Region Association: Southern California |
QUOTE(young55961 @ Jun 20 2026, 03:24 PM) QUOTE(Montreal914 @ Jun 20 2026, 02:59 PM) picture... I have a middle port on each fuel rail. Should I use a T-fitting to connect them together? I'm not sure what the purpose of these ports is. Are they for vacuum or pressure relief? Also, what about my second question? Do I need the EGR valve and the metal lines, or can I run the engine without them? Tks. Sorry, I did not read you answer carefully. Actually is the fuel supply line to the cold start valve. I guest I can just plug the other one. |
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Posts in this topic
young55961 Convert back to D Jet Fuel Injection- Jun 20 2026, 01:14 PM
Montreal914 Your answer is in your post. :)
The cold start ... Jun 20 2026, 01:46 PM
wonkipop
picture...
I have a middle port on each fuel... Jun 20 2026, 03:38 PM young55961
[quote name='young55961' post='3262163' date='Jun... Jun 20 2026, 04:26 PM |
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