All of a sudden my w126 has gotten a stalling problem.

The car for example when standing at a light in D will begin to twitch and shake (pulsate) and then will just shut off but starts right up!

really need help on this now as its actually become a matter of safety. Doing a left turn today in the middle of busy intersection and when about to give it gas to get out of there this ***** decides to die. Started up with hesitation and then when you put it in gear and try to do its heavy hesitation and then blasts off.


I noticed though the economy when sitting in drive with engine fully warmed up its not all the way to the left completely. Its slightly moved to the right but very slighlty which could indicate a vacummn leak? Would it effect the engine like this and how would I look for a vacumn leak?


Fuel pump relay was just replaced and that did nothing.

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99 C43
98 S420
99 C230K
01 C240

try the cheap stuff first. Buy a good fuel system cleaner and take her to a highway and let the system clean itself out. It is worth to try it. If it does not help, no harm would have been done anyways.
Good luck!

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J.H.
'86 300E

I've had old spark plugs do the same thing to me, especially in hot days!

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car

spark plugs and wiring were changed a few months ago. Today all of sudden its not doing it and its hot outside. I did shake a few times just slightly but no stalling.

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99 C43
98 S420
99 C230K
01 C240