>> I have a 2003 C230 Coupe with the 1.8l and a 6-speed manual. Last fall,
>> I had teh car into the dealer, b/c it would shake violently at an idle,
[quoted text clipped - 9 lines]
>
> What did they do to fix it the last time?
Overfilling the fuel tank (adding one or more tries to get a little more
fuel into the tank after the first automatic click/shutoff) causes liquid
fuel to back up into the emissions tube on the fuel filler neck. The liquid
fuel saturates a relatively large amount of activated charcoal in a
cannister under the car, and it is unable to temporarily store fuel tank
vapors. The self-checking emissions controller sees a malfunction at the
fuel tank, and the Check Engine light comes on. The engine suddenly runs
rough, barely idling, shaking violently, and then resolves itself in about
20 minutes, when the charcoal cannister begins to dry out.
Once doused with gasoline, the activated charcoal in the cannister is
hardened, less absorbent and less able to temporarily hold fuel vapors.
Repeated dousings from overfilling the fuel tank is a great way to get
another charcoal cannister before you would have otherwise needed one.
>>> I have a 2003 C230 Coupe with the 1.8l and a 6-speed manual. Last fall,
>>> I had teh car into the dealer, b/c it would shake violently at an idle,
[quoted text clipped - 25 lines]
> My hunch is its wiring related somehow as the car still sounds fine and
> behaves normally.
Gordon Hudson - 17 Mar 2006 21:09 GMT
> Overfilling the fuel tank (adding one or more tries to get a little more
> fuel into the tank after the first automatic click/shutoff) causes liquid
[quoted text clipped - 10 lines]
> Repeated dousings from overfilling the fuel tank is a great way to get
> another charcoal cannister before you would have otherwise needed one.
Thanks for that, but its not whats causing it in my car
Thinking abou it it happens mainly when the engine is hot and there is not
much fuel left in the tank,
although that might just be coincidence.