[W126 Coupe] Engine problem

[Dick Spellman]

Hi Ronny:

If you have a volt meter handy check the resting voltage on your car 
battery.  Follow this with a reading on the battery terminals with the 
engine running.  If resting voltage is 12.7+ and charging is 14+ it is 
not the battery or charging circuit.  If the voltages are below these 
levels I'd suspect your regulator is failing on the alternator or the 
drive belt is loose.  If this is the case do not drive the car, fix the 
regulator right where the car sits to avoid a tow truck call.

When the major work you describe was done, was the distributor cap, 
rotor and wire set replaced? If so, you can rule these out, if not, I'd 
just take a peek under the distributor cap to see how the tower carbon 
pick-up looks and how the rotor edge and track on the cap look.

Could alss be fuel related and I'd start by doing a check of the fuel 
pump relay which has been written up in the archives numerous times.

How'd the car run up to the piont where it failed?  When you started her 
up again was the engine smooth, rough, slugish etc???

\Dick

Ronny wrote:

> Yesterday, while driving approx. 30 ml the engine suddenly stottered 
> and then keep going. About half a mile further it did again and the 
> engine stopped.
> I tried to start again with no success.
> Waited 10 minutes and the motor started and I drove home without any 
> problem.
> I will take the car to my mechanic on monday, but who has experience 
> this before and what could be the problem? My 1987 560 SEC has 142,000 
> ml and had a major repair at 120,000ml (timing chain and valve job).