|
|
|
|
| Author |
|
|
Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
|
"hot" wire to cold start valve?
I have a question about the "hot" wire to the cold start valve on my SC. Is this wire "hot" all the time or only when the starter motor is engaged? Currently, I have the wire connected to a source that is "hot" while the engine is running.
As always, any help is greatly appreciated.
__________________
Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
||
03-31-2003, 11:50 AM
|
|
|
Heck, I知 only 5 not 71!
|
Looking at the schematic for the 82SC on the pelican web site. the cold start valve looks like it is only active during starting a cold engine. If the engine is warm/hot and it is started the thermal switch opens and removes the ground path for the cold start valve. If you have the 12 volts supplied to the cold start valve all the time then it would be passing fuel all the time until the engine warms up and the thermo switch opens. This would have you running a rich mixture for quite a while and not very fuel efficient.
__________________
Pat Henry Targa80 1980SC Targa (Mocha Brown) |
||
|
03-31-2003, 12:31 PM
|
|
|
Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
|
Pat,
So you are saying that the cold start valve should only be providing fuel while the starter motor is turning the engine over? If this is true, where would be good spot to pick up the "hot"? Thanks,
__________________
Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver Last edited by Kemo; 03-31-2003 at 01:30 PM.. |
||
|
03-31-2003, 01:27 PM
|
|
|
Heck, I知 only 5 not 71!
|
If you were to look at the 1982SC schematic The solenoid would be providing battery voltage through the relay contacts of the solenoid. Granted this is for an 82SC, I would have to look at schematics for the 77/78 to be sure if it is the same.
__________________
Pat Henry Targa80 1980SC Targa (Mocha Brown) |
||
|
03-31-2003, 02:21 PM
|
|
|
Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
|
I have an 82 engine...
__________________
Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
||
|
03-31-2003, 02:22 PM
|
|
|
Heck, I知 only 5 not 71!
|
Well then this should apply to you as long as the harness is also for the 82
__________________
Pat Henry Targa80 1980SC Targa (Mocha Brown) |
||
|
03-31-2003, 02:24 PM
|
|
|
|
Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
|
it looks like there is a wire to be attacched to the starter, thru a 15amp fuse. am i reading this right?
__________________
Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
||
|
03-31-2003, 02:24 PM
|
|
|
Heck, I知 only 5 not 71!
|
Where is the 15Amp fuse I don't see it in the starter solenoid circuit.
__________________
Pat Henry Targa80 1980SC Targa (Mocha Brown) |
||
|
03-31-2003, 02:26 PM
|
|
|
Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
|
right on the starter...there is a 15a.
__________________
Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
||
|
03-31-2003, 02:27 PM
|
|
|
Heck, I知 only 5 not 71!
|
This is the oter half of the diagram for the cold start and thermo switch82SC cold start part 2
__________________
Pat Henry Targa80 1980SC Targa (Mocha Brown) |
||
|
03-31-2003, 02:28 PM
|
|
|
Heck, I知 only 5 not 71!
|
The 15a is the contact number on the starter and has nothing to do with indicating a 15AMP fuse. The 15a is where you would get thepower for the start valve.
__________________
Pat Henry Targa80 1980SC Targa (Mocha Brown) Last edited by targa80; 03-31-2003 at 02:34 PM.. |
||
|
03-31-2003, 02:29 PM
|
|
|
Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
|
Oh...so I can wire it directly to the cold start valve...
Pat, you are a very patient person. Thanks for the help.
__________________
Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
||
|
03-31-2003, 02:34 PM
|
|
|
|
Heck, I知 only 5 not 71!
|
Well it is the end of the day for me so I am heading home and will check the bbs then. Good luck your on the right track.
__________________
Pat Henry Targa80 1980SC Targa (Mocha Brown) |
||
|
03-31-2003, 02:36 PM
|
|
|
Registered
|
Cold Start Valve
Kemo,
I also have a '78SC. Pat is correct about CSV being controlled by the thermo switch. When the engine is cold, the thermo switch will supply power to CSV at start for a brief moment only. Once the engine is warm, the thermo switch will be open and cut off any power to the CSV. So when you start the engine (warm), the CSV does not squirt fuel to the chamber. |
||
|
03-31-2003, 06:27 PM
|
|
|
Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
|
thanks for the clarification, looks like a new project for the weekend!
__________________
Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
||
|
04-01-2003, 04:12 AM
|
|
