 Emergency! Vacuum Diagrams..., 914 2.0 1974 |
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| CG-914 |
 Jun 22 2011, 12:14 PM
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#1
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Member  Group: Members Posts: 326 Joined: 27-December 10 From: LA/OC CA Member No.: 12,526 Region Association: Southern California  |
This a emergency situation!
Vacuum diagrams are need. the problem is, that the diagrams for early or late 74 do not fit completly! I do not have a vacuum hose connection at the cold start valve and i do not have the second vacuum hose connection at the throttle body from the distrubitor. And if i hook up the hose from the oil infill to the bottom to the throttle body sucks oil in the mixture... can anybody help me out?   |
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| r_towle |
Jun 22 2011, 12:54 PM
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#2
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Custom Member Group: Members Posts: 24,640 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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on DD diagram the "cold start valve" is the little electrical flapper inside the air filter aseembly, not the "cold start injector"
Not all throttle bodies have two vacuum ports for the distributors...the factory sent these cars out with a short hose on the distributor left open to the atmosphere....so no worries there. The large line from the oil filler tower should be attached to the intake plenum, not the throttle body and not in front of the throttle body. If its sucking oil, you need a new PCV vavle in the oil filler tower. Rich |
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| CG-914 |
Jun 22 2011, 01:44 PM
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#3
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Member Group: Members Posts: 326 Joined: 27-December 10 From: LA/OC CA Member No.: 12,526 Region Association: Southern California |
the PCV valve sounds good,
but it still only got 5 instad of 18-20 vacuum inch... |
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| r_towle |
Jun 22 2011, 02:44 PM
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#4
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Custom Member Group: Members Posts: 24,640 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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does your mps hold a vacuum?
Rich |
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| CG-914 |
Jun 22 2011, 03:39 PM
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#5
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Member Group: Members Posts: 326 Joined: 27-December 10 From: LA/OC CA Member No.: 12,526 Region Association: Southern California |
mps?
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| type47 |
Jun 22 2011, 03:46 PM
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#6
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
QUOTE(CG-914 @ Jun 22 2011, 01:39 PM)  mps? Manifold Pressure Sensor. #8 in Bolwsby's diagram. VERY important piece of the FI puzzle... |
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| CG-914 |
Jun 22 2011, 04:21 PM
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#7
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Member Group: Members Posts: 326 Joined: 27-December 10 From: LA/OC CA Member No.: 12,526 Region Association: Southern California |
the mps just got replaced with a complete new one! it was part of the problem...
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| Cap'n Krusty |
Jun 22 2011, 04:34 PM
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#8
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
QUOTE(r_towle @ Jun 22 2011, 11:54 AM) on DD diagram the "cold start valve" is the little electrical flapper inside the air filter assembly, not the "cold start injector" Not all throttle bodies have two vacuum ports for the distributors...the factory sent these cars out with a short hose on the distributor left open to the atmosphere....so no worries there. The large line from the oil filler tower should be attached to the intake plenum, not the throttle body and not in front of the throttle body. If its sucking oil, you need a new PCV valve in the oil filler tower. Rich You said: "On DD diagram the "cold start valve" is the little electrical flapper inside the air filter assembly, not the "cold start injector". That's wrong. In the drawing, the CSV is clearly marked underneath the air cleaner housing, and that's where the 12mm vacuum hose from the AAR goes. There is no "little electrical flapper inside the air filter assembly, not the "cold start injector". Nothing but air filter in there. The CSV sits on a plastic spacer/hose fitting on the side of the intake plenum. The Cap'n |
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