Author Topic: Cold Start Valve - blocked / clogged jet  (Read 4027 times)

db180

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Cold Start Valve - blocked / clogged jet
« on: October 01, 2012, 19:15:13 »
Hi Folks,

New to this site and have searched and tried what has already been suggested, but one of the jet's on the CSV is still blocked.

Was wondering if anyone had advice or tricks/tips on what could be done to unblock it.

So far I have tried soaking in carb cleaner, pressurised air and water - still stuck. Don't really want to try heat.

Thanks in advance.


GH.

twistedtree

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Re: Cold Start Valve - blocked / clogged jet
« Reply #1 on: October 01, 2012, 20:26:08 »
Have you blown through it backwards with air?  The next step would probably be a thin wire.
Peter Hayden
1964 MB 230SL
1970 MB 280SL
2011 BMW 550xi

ja17

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Re: Cold Start Valve - blocked / clogged jet
« Reply #2 on: October 01, 2012, 23:40:36 »
Also try soaking it in alcohol, which works best on fuel varnish. Could rust be your problem?
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

db180

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Re: Cold Start Valve - blocked / clogged jet
« Reply #3 on: October 02, 2012, 19:35:30 »
Thanks for the advice.

I've left it soaking in alcohol and see if this corrects it.
I don't think it's rust as the rest of the unit has no rust on it.

I'll update the thread if I can get it unclogged - otherwise I may just get a recon unit.

Jordan

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Re: Cold Start Valve - blocked / clogged jet
« Reply #4 on: October 02, 2012, 22:41:34 »
GH, are you testing it on the car itself?  If not how are you testing it?  Thanks.
Marcus
66 230SL  Euro 4 speed

db180

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Re: Cold Start Valve - blocked / clogged jet
« Reply #5 on: October 04, 2012, 22:08:14 »
The alcohol seems to have done the trick!

I was testing it off the car, using the method in the Tech Manual. One nozzle became unclogged with carb cleaner, then I tried the advice to use alcohol.

Fitted it back together and car fired up, eventually. I then switched it off and restarted the following evening and it started much eaiser.

Many thanks for the advice.