 Cold start valve question..., Question 1 for tonight |
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| eldiosyeldiablo |
  Jan 18 2004, 06:40 PM
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#1
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Member  Group: Members Posts: 129 Joined: 19-August 03 From: Roswell, GA Member No.: 1,047  |
Hey guys. I'm starting to replace the vacuum lines on my car as the first todo thing on my list.
However other than the large vacuum line that attaches to the cold start valve there is another small plug on it. Plus it also has a connection for electical. Neither the small vac hole or the electrical has anything plug in on it. Where is the small line suppose to go to? Pics are greatly appreciated. I am not finding anything on the Hayes manual for this. Thx, David Attached image(s) 
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| JeffBowlsby |
Jan 18 2004, 08:16 PM
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#2
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914 Wiring Harnesses & Beekeeper Group: Members Posts: 8,963 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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The CSV has a 2 pole connection on the FI wire harness...is that it laying the background of your photo? 1 wire of that 2 wire connection should have constant +12V from the ECU computer and the other goes directly (through the harness) to the thermotime switch just aft of the dizzy. The thermotime switch provides the ground path for the circuit, as temps vary. The CSV injects additional fuel into the air plenum as long as the thermotime switch determines its too cold, and needs the additional fuel.
The AAV works somewhat similarly, but the thermotime function is fully self-contained within it. The heater in the AAV is always on while the ignition is running, and when the AAV is warm, it closes and cuts off the additional air it was supplying to the air plenum for cold starts. Nop wonder they burn out all the time. (IMG:style_emoticons/default/cool.gif) Grusse |
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Posts in this topic
eldiosyeldiablo Cold start valve question... Jan 18 2004, 06:40 PM
vsg914 Small hose line goes to the fuel rail on the drive... Jan 18 2004, 06:50 PM redshift Maybe you can live without the CSV, but the AAR op... Jan 18 2004, 06:57 PM Brad Roberts Does this mean I could pulse the 5th injector for ... Jan 18 2004, 08:29 PM tracks914 QUOTE
Brad Roberts Yeah.. but sometimes I ask questions that I alread... Jan 18 2004, 10:53 PM redshift It's not the optimum place to add extra fuel... Jan 18 2004, 11:18 PM
Dave_Darling The CSV only gets +12V while the starter is cranki... Jan 19 2004, 12:31 AM |
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