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  #1  
Old 10-18-2010, 09:38 AM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
m117 cold start issue (560SEL)

Hello everyone,

A friend of mine has a 560SEL MY90 and is having trouble starting it in the cold. He told me that it took a good few minutes of cranking for the engine to start up and once it did, he had no power until the engine was a bit warmed up..

Anyone have any thoughts on this? Tune up is recent too.

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  #2  
Old 10-18-2010, 10:11 AM
pawoSD's Avatar
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Could be an issue with the idle air control, or the temp sensors on the engine. My 300 did the same thing when I got it, wouldn't start well, no power until warm...etc. I changed all the sensors and idle air valve and hoses, and it was much much better.
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  #3  
Old 10-18-2010, 10:15 AM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
check the fuse[s] on the ovp relay.the description you gave is perfect for limp home on that car.
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4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
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  #4  
Old 10-18-2010, 10:32 AM
JamesDean's Avatar
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Join Date: Apr 2005
Location: NE Ohio
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if the ovp fuse was out wouldnt other idiot lights on the dash be on as well? ABS, etc?

pawo, the idle air stuff has all been replaced.

Temp sensors and the like, I'm not sure about.
The only thing I know is that the O2 sensor is disconnected, however that shouldn't effect start up, I don't believe.

He's also complaining about no heat, he flushed out the coolant system last week and replaced the main radiator hoses.
I suspect it just needs to be burped, it had heat prior to the flush/change.

And the final thing he's after is (1) accumulator and (1) hydraulic ram.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #5  
Old 10-18-2010, 02:08 PM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
not necessarily if double fuse version.
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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg
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  #6  
Old 10-19-2010, 09:55 PM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
i checked fuses, and they were OK.

I just thought of this today, it might be OVP related actually. Does anyone know if cold start injector is (indirectly) connected to ovp?

Also, I just remembered the ABS idiot light is missing (wires hanging behind cluster, no fixture)

So, more investigation is needed.
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
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  #7  
Old 12-28-2010, 12:25 PM
JamesDean's Avatar
Electrical Engineer
 
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
Alright everyone,

So We managed to fix a high idle problem on the car however, we've still got some odd behavior under and around 60C.

Starting the car cold is hard. When it starts up it runs pretty rough. If you dont keep your foot down (rpms up) the engine will stall out. We checked the cold start injector and its getting voltage during cranking.

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k
Reply With Quote
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