 Cold start valve, Bypass it? |
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Sunday, 13 July 2025 |
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| Ian Stott |
 Jun 21 2015, 05:15 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  |
Does the cold start valve just matter when engine is cold? When engine is warmed up could you bypass the cold start valve with no issues?
Ian Stott Moncton Canada |
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| Spoke |
Jun 21 2015, 06:31 AM
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#2
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Jerry Group: Members Posts: 7,189 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None 
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The cold start valve operates only below freezing (0C). Once the case temperature is above freezing, the cold start valve is not active.
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| Tom_T |
Jun 21 2015, 04:35 PM
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#3
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TMI.... Group: Members Posts: 8,321 Joined: 19-March 09 From: Orange, CA Member No.: 10,181 Region Association: Southern California
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QUOTE(Spoke @ Jun 21 2015, 05:31 AM)  The cold start valve operates only below freezing (0C). Once the case temperature is above freezing, the cold start valve is not active. Jerry - I think it actually cuts in a bit above freezing from my experience here in SoCal. BTW - it's now time to update your avatar pic to Bucs or Steelers logos! (IMG:style_emoticons/default/biggrin.gif) . Ian - the ECU should be automatically cutting out the CSV when the engine is warmed up enough. It's only supposed to boost the fuel/air mixture when needed - just like the hand throttle on the 914-6s & early non-EFI 911s. If it's not doing so, then you've got something up with your ECU, & I suggest you get FIC/BRET in Tracy/Livermore CA or someone competent to rebuild it or sell you a rebuilt on core exchange. BRET used to be in Torrance/SoCal, but were bought by FIC & moved up north years ago. My 73 2.0's ECU was cored out to BRET in the late 70's/early 80's & had run fine for another 5-7+ years after that. https://www.fuelinjectioncorp.com/ Cheers! (IMG:style_emoticons/default/beerchug.gif) Tom /////// |
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Posts in this topic
Ian Stott Cold start valve Jun 21 2015, 05:15 AM
SLITS I have more than once disabled the cold start valv... Jun 21 2015, 06:52 AM
VegasRacer
On my /6 they are disabled also.
Never had a pro... Jun 21 2015, 07:03 AM r_towle The ECu is most likely not the issue, so don't... Jun 21 2015, 05:16 PM Ian Stott Can you just unplug the electrical connection and ... Jun 22 2015, 02:42 AM r_towle Just unplug the electrics and the fuel line...simp... Jun 22 2015, 05:52 AM mepstein Cold start valve isn't working right
Replace t... Jun 22 2015, 09:40 AM Ian Stott Cold start valve electrical unhooked, fuel line di... Jun 23 2015, 05:51 PM |
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