Hi all, I'm puzzled why my '89 300e would not start today after running just
fine for a couple of km. Admittedly it had been sitting for 10 days or so
in the sun (well over 30C several days) without being used. It started
reasonably well, ran just fine a few km, I then parked it for about 20 min
and on trying to start it much sputtering and weak firing etc. The gas
cap came off without vacuum, after it ran again, with the odd sputtering, it
is now apparently just fine again when I tried it after supper.... is this
a vapour lock sympton? If so, why did it run initially though??
Most likely due to vapor lock. The fuel system ought to be checked to
ensure it retains full pressure (pressure prevents liquid to gas
The reason the motor started well when cold was just that - it was cold,
so the fuel was in its liquid form.
thanks to you and Tiger for that, appreciated. I had in the back of my
mind that that vapour lock problems required 'Death Valley' kind of temperatures
not low 30's C (ie 90's F). Moreover, why would the engine have worked just
fine for a few km ..... wouldn't that have purged the whole fuel system of
any trapped gas vapours ?
thanks, I imagine - as you say - higher ambient temperatures along with
old age. Consequently, I clearly need to follow up on the fuel pressure
after engine shutoff. I'm getting more and more indications that at 235k km
ie 150k miles, the car is beginning to show it's age. I'm glad that I was
driving and not my wife.... at least this way I got supper.
what to buy, what to buy in terms of a nice about 3 to 5 year old,
new to me, MB for the wife.
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