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MECHANICALS With a 30 year-old automobile, there will always be discussion here - maintenance, modifications and mechanicals.

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  #1  
Old 28th February 2017, 06:12 AM
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Michel Michel is offline
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Default Hard to start

My 690SEL hardly gets driven and always gave me a little grief in startiing up when warm. Maybe three goes and it will come alive.
Each one of those goes feels like fuel starvation.

But when cold, she would fire up from the first go.

However, last night, it refused to start even when cold and I mean I had 15-20 goes before it came alive.

Jerry tells me it's been like that for more than 2 weeks.
Any ideas?
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1978 W116 690SEL # 3312
1985 R107 500SL AMG
2000 W208 CLK430 Coupe
2003 W163 ML320
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  #2  
Old 28th February 2017, 06:38 AM
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Default Re: Hard to start

Hot starts could be fuel accumulator.
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Old 28th February 2017, 07:23 AM
sean sherry sean sherry is offline
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Talking Re: Hard to start

Just change the accumulator and also the o ring on the pressure regulator....... After that, a full pressure test
i'm guessing that it is the k jetronic system ?.
I never did completely sort mine. Checked everything over a couple of weeks. Owners manual advises to hold the throttle open when hot starting and closed when cold.
Ant has all the test equipment if you want to tackle it yourself. A time consuming job can be Dollars plus.
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Old 28th February 2017, 08:22 AM
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Default Re: Hard to start

I knew about the accumulator and was hapy to live with it.
But cold start is crazy.
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1978 W116 690SEL # 3312
1985 R107 500SL AMG
2000 W208 CLK430 Coupe
2003 W163 ML320
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Old 28th February 2017, 12:03 PM
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Default Re: Hard to start

I've never had this problem, but making sure the cold start enrichment is working might be worth a try.
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Old 28th February 2017, 02:39 PM
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Default Re: Hard to start

Initially Michel, I would check the fuel pump, and the associated filter. It is important that fuel delivery is up to specifications. In addition, how long is it since the fuel filter has been changed, although checking the pump is more important.

Also, I am hoping that Helmet will come into this conversation. If anyone knows, he is your best contact. Regards Styria
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Old 28th February 2017, 09:51 PM
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Default Re: Hard to start

Unfortunately I'm on a flight to Europe as I type (courtesy of Emirates inflight Wifi).
I'll have to look at it when I return.
Maybe even drive it to Helmet's
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1978 W116 690SEL # 3312
1985 R107 500SL AMG
2000 W208 CLK430 Coupe
2003 W163 ML320
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  #8  
Old 1st March 2017, 07:52 AM
sean sherry sean sherry is offline
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Smile Re: Hard to start

What a good idea.
There is also a Specialist who does nothing else but K Jetronics. He has all the gear to bench test all the components. He will pressure test the system on the Car before he starts. He is used extensively by the Trade. A bit like a specialist that Doctors give references for health issues.
Let me know if you would like his contact details.
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Old 1st March 2017, 01:51 PM
BenzBoy BenzBoy is online now
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Default Re: Hard to start

Quote:
Originally Posted by Michel View Post
Unfortunately I'm on a flight to Europe as I type (courtesy of Emirates inflight Wifi).
I'll have to look at it when I return.
Maybe even drive it to Helmet's
The lovely thing about flying Etihad is settling back with a glass of Moet et Chandon and contemplating the lunch menu ......
Wi-Fi on a plane = work = No.
Regards,
Brian
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Old 1st March 2017, 03:30 PM
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Default Re: Hard to start

I prefer the Dom in Singapore Suites/First, not too keen on the Krug
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Old 1st March 2017, 05:52 PM
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Default Re: Hard to start

Quote:
Originally Posted by Michel View Post
Unfortunately I'm on a flight to Europe as I type (courtesy of Emirates inflight Wifi).
I'll have to look at it when I return.
Maybe even drive it to Helmet's
Please do , then we can diagnose it properly and not have the use the internet crystal ball
Enjoy the flight
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  #12  
Old 2nd March 2017, 03:37 AM
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Default Re: Hard to start

Quote:
Originally Posted by sean sherry View Post
What a good idea.
There is also a Specialist who does nothing else but K Jetronics. He has all the gear to bench test all the components. He will pressure test the system on the Car before he starts. He is used extensively by the Trade. A bit like a specialist that Doctors give references for health issues.
Let me know if you would like his contact details.
Sean, would be good if you could provide the details. Regards. Styria
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Old 2nd March 2017, 06:53 PM
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Default Re: Hard to start

Michel, another problem may well be your Spark Plugs. Constant cold starts, as in moving the car fifteen metres at a time, God knows how many times, can play havoc with starting. Right at this moment, I am not able to help you. I am booked in for an operation in three weeks, and I am trying to utilise every moment to tidy up my affairs. Please understand. Regards. Styria
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  #14  
Old 3rd March 2017, 06:12 PM
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Default Re: Hard to start

Quote:
Originally Posted by Styria View Post
Michel, another problem may well be your Spark Plugs. Constant cold starts, as in moving the car fifteen metres at a time, God knows how many times, can play havoc with starting. Right at this moment, I am not able to help you. I am booked in for an operation in three weeks, and I am trying to utilise every moment to tidy up my affairs. Please understand. Regards. Styria
Spark plugs it could be!
However, I have not experienced this before.
I hope your operation is successful Godfather.
Hope to speak with you upon my return!
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1978 W116 690SEL # 3312
1985 R107 500SL AMG
2000 W208 CLK430 Coupe
2003 W163 ML320
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  #15  
Old 4th March 2017, 03:29 PM
sean sherry sean sherry is offline
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Thumbs up Re: Hard to start

Hi Michael, which bits are falling Off,
if I knew I could say welcome to the Club !!
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