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Author Topic: Injector Pump Cold Start Solenoid Cleaning  (Read 3116 times)

col320ce

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Injector Pump Cold Start Solenoid Cleaning
« on: October 08, 2016, 23:23:53 »
Can I remove the Injector pump cold start solenoid to check that the solenoid is not seized etc?  Otherwise I am a little confused on how to test it.
Thanks ...
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Col

1964 230SL
1965 250SE coupe
1993 320CE Sportline

wjsvb ✝︎

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Re: Injector Pump Cold Start Solenoid Cleaning
« Reply #1 on: October 09, 2016, 01:43:34 »
No need to remove it: with the engine off, touch a hot 12v positive lead to the lead on the CSV solenoid and then a 12v negative to a ground on the engine.  If the solenoid is OK, you will hear it click.

OOPS! I didn't see the picture, and assumed you were talking about the CSV.  The same test may work on the IP solenoid but I can't be sure.  Sorry!
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jon

67 250SL early
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col320ce

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Re: Injector Pump Cold Start Solenoid Cleaning
« Reply #2 on: October 09, 2016, 06:22:20 »
Well that seems to work!
Both solenoids make a sound with 12v on them.
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Col

1964 230SL
1965 250SE coupe
1993 320CE Sportline

ja17

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Re: Injector Pump Cold Start Solenoid Cleaning
« Reply #3 on: October 12, 2016, 06:15:46 »
Now check to see if it is activated during starting.
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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)
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col320ce

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Re: Injector Pump Cold Start Solenoid Cleaning
« Reply #4 on: October 12, 2016, 06:32:51 »
Hi joe
I'm pretty sure my thermo time switch is broken.  I've bench tested it and W is an open circuit no matter what the temp is.
I'll put it back in and put a test lamp on it. I think I am only going to get voltage to the injector solenoid for 1 second... as I think this is how the relay works when the TTS is broken.
I'll report back on a tick...
Thanks for your help...
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Col

1964 230SL
1965 250SE coupe
1993 320CE Sportline

col320ce

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Re: Injector Pump Cold Start Solenoid Cleaning
« Reply #5 on: October 13, 2016, 11:41:10 »
The injector solenoid gets 1 second of power then nothing...  So I need to pony up the cash for a TTS I think.
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Col

1964 230SL
1965 250SE coupe
1993 320CE Sportline
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