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Old 02-07-2007, 10:14 AM
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zcc zcc is offline
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Question 560 Cold Start Problem Griped But How To Solve?

Finally I found the causing of cold starting problem in my 560SEL 1989. After more that a week of tests I found the there is no electricity to the cold start valve (the 9th injector). Wiring is ok, where shall I start?

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380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current


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Old 02-07-2007, 10:35 AM
MJM MJM is offline
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Hello,

The way I understand it the cold start valve only gets current for a very brief period of time at start up (seconds). Did you check for current while someone else was starting the car?

Otherwise you shouldn't find current at the cold start valve, unless I'm really off base.
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Old 02-07-2007, 11:06 AM
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Originally Posted by MJM View Post
Hello,

The way I understand it the cold start valve only gets current for a very brief period of time at start up (seconds). Did you check for current while someone else was starting the car?
Yes, that's exactly what I did when the car was cold. So mainly, from where it will take the current?
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Master Computer Engineer, A+, Network+, MCP/MCSA/MCSE 4/2k/2k3 - Messaging, MCTS, MCITP, MCT, Brainbench, ICDL and starting Ph.D

380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current


http://search.ebay.com/_W0QQsassZkhazenzcc
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  #4  
Old 02-07-2007, 11:42 AM
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560 Cold start

Exactly how cold was the engine when you tested it?
The cold start valve will not open at temperatures above +15c (59f).
Check the two pole temp sensor on the manifold, Resisatnce should be nearly the same measured from ground to each pin seperatly. At 20c the resistance should be 2400 to 2600 ohms.
Good luck Mike
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Old 02-07-2007, 02:44 PM
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Originally Posted by Mike Freeman View Post
Exactly how cold was the engine when you tested it?
The cold start valve will not open at temperatures above +15c (59f).
Check the two pole temp sensor on the manifold, Resisatnce should be nearly the same measured from ground to each pin seperatly. At 20c the resistance should be 2400 to 2600 ohms.
Good luck Mike
Well I guess it wasn't less than 20c. Thus it didn't function....
I'll try to change the fuel relay and see..
__________________
Master Computer Engineer, A+, Network+, MCP/MCSA/MCSE 4/2k/2k3 - Messaging, MCTS, MCITP, MCT, Brainbench, ICDL and starting Ph.D

380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current


http://search.ebay.com/_W0QQsassZkhazenzcc
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  #6  
Old 02-07-2007, 10:04 PM
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True, the cold start valve will not operate at temp (water temp, not air temp) above 15c.

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