Author |
Message |
thechief68 Samba Member
Joined: May 25, 2012 Posts: 29 Location: Vancouver
|
Posted: Sat May 18, 2019 5:44 pm Post subject: Cold Start Valve (CSV) on time |
|
|
I wanted to determine if my cold start valve in my 77 VW Westfalia was firing during cold start.
I completely remove the cable connecting the coil to the distributor to ensure there was no sparks and mounted the cold start valve to the lid of a small mason jar.
I cranked the engine for about 20 seconds minutes and as you can see I the video, the CSV engaged with a nice misty spray pattern for 5 seconds. Is 5 seconds the expected duration?
I recorded the video below on my iPhone in slow motion ( but the YouTube upload didn’t retain the slowmo action).. while the slowmo shows a great view of the spray pattern but the slowmo audio revealed some concerning sounds.
The first sound is a clicking sound when the starter engages... sounds a bit like a spark... it might be my hot start relay but open to any others thoughts.
The second sound is a chirp as the engine turns... not sure what this might be caused from. Any thoughts on possible causes would be much appreciated.
Here’s a link to the video I took
Link
_________________ 1977 & 78 Westfalia
2.0L Automatic |
|
Back to top |
|
|
SGKent Samba Member
Joined: October 30, 2007 Posts: 41031 Location: Citrus Heights CA (Near Sacramento)
|
Posted: Sat May 18, 2019 9:34 pm Post subject: Re: Cold Start Valve (CSV) on time |
|
|
the click is a relay. I don't hear the chirp. _________________ “Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
|
Back to top |
|
|
airschooled Air-Schooled
Joined: April 04, 2012 Posts: 12722 Location: on a bike ride somewhere
|
Posted: Sun May 19, 2019 11:04 am Post subject: Re: Cold Start Valve (CSV) on time |
|
|
Five seconds is about right for many climate zones this time of year; you can see the approximate correlation of ambient temp (of the TTS) to spray time in the L-Jet manual on page 28:
https://www.thesamba.com/vw/archives/manuals/afc_f...Manual.pdf
See you on the road,
Robbie
EDIT: I thought the video WAS slow motion. I feel like your engine is cranking excessively slow now. _________________ Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com
Last edited by airschooled on Sun May 19, 2019 12:58 pm; edited 1 time in total |
|
Back to top |
|
|
Wildthings Samba Member
Joined: March 13, 2005 Posts: 50348
|
Posted: Sun May 19, 2019 12:15 pm Post subject: Re: Cold Start Valve (CSV) on time |
|
|
The Thermal-Time switch reacts to both time and temperature in deciding how long to spray fuel.
Your starter sounds like it is struggling to turn the engine over, if you are having starting problems, I would suggest figuring out why the engine doesn't crank faster. |
|
Back to top |
|
|
Randy in Maine Samba Member
Joined: August 03, 2003 Posts: 34890 Location: The Beach
|
Posted: Sun May 19, 2019 12:34 pm Post subject: Re: Cold Start Valve (CSV) on time |
|
|
I think I read somewhere that the spray only last 8 seconds (ironically the same as a bull ride).
"I will be looking for eight when they hit that gate and I am hoping the judge ain't blind." George Strait. |
|
Back to top |
|
|
|