[W126 Coupe] 560 SEC Cutting Out

[Dick Spellman]

Hi Jay,

Here is one way of isolating the problem.

If you have a fuel pressure gauge, hook this up and start the engine. 
You should see 5.2-5.3 bar on the gauge with engine/pumps running.

When the engine quits look at the gauge if, it's still at pressure your 
problem is electric.  If the pressure is down you know it's fuel.

-\Dick

On 5/15/2010 12:38 PM, Jay Manek wrote:

> Hi guys,

> Well i swapped Crank Sensor and the EZL... at first I thought id got it

> as one of the connections was green...but just getting the car out of

> the garage and it stalled on me.

> Its getting pretty annoying! Any ideas guys?

> I ordered a crank sensor from mercedes but they sent me the TDC sender

> instead.. When i told them, they said a new crank sensor was over £200

> GBP.. so i swapped both the EZL and crank sensor from my donor car.

> So any idea where this TDC sender goes? Its a probe, looks like the

> crank sensor and the other end has a 3 pin rectangular connector... may

> as well change it now ive paid for it!

> Many Thanks & Regards

> Jay Manek

>

> *From:* Axel Wulff <mailto:axelwulff at hotmail.com>

> *Sent:* Monday, May 10, 2010 1:04 PM

> *To:* mbcoupes at mbcoupes.com <mailto:mbcoupes at mbcoupes.com>

> *Subject:* Re: [W126 Coupe] 560 SEC Cutting Out

>

> Jay,

>

> About the cutting in and out; have you checked the EZL?

>

> Not a part that seems to fail a lot on the M117, but I've had a lot of

> EZL issues with the M119 engine in my car and those are the exact symptoms.

>

> Regards,

> Axel J. Wulff

> 610-731-5453 Cellular

> 610-572-4611 Home

>

>

>

>

> ------------------------------------------------------------------------

> From: jaymanek at hotmail.com <mailto:jaymanek at hotmail.com>

> To: mbcoupes at mbcoupes.com <mailto:mbcoupes at mbcoupes.com>

> Date: Mon, 10 May 2010 12:37:45 +0100

> Subject: [W126 Coupe] 560 SEC Cutting Out

>

> Hi All,

> Ok im struggling with my 560 SEC..

> Basically it just cuts out at low revs.. it will idle for hours without

> an issue but when driving it cuts out when approaching a junction..

> sometimes when approaching a junction at low speed and other times just

> when pulling away..

> I have swapped the Idle control unit and Fuel Pump Relay.. but no

> difference...

> When this first started happening, the car would not restart and the

> fuel pump would not run, I had to jumper the pins (i think 15 and 47?)

> to get the fuel pump to run so I could get home.. It did this even with

> the brand new relay... but recently it seems to restart immediately...

> HELP!!

> Many Thanks & Regards

> Jay Manek