Stumbling starting - stevebfl - help !
 

My 1984 380 SE has a hard starting problem. The car runs fine but does consume more than normal gas.

The early morning start is great - not a problem. So I am assuming it is not the accumulator.

Trying to start immediately after shutting off a hot engine is also great - not a problem.

However, if the car has been sitting for 4~5 hours after being driven, then it needs significantly more cranking to start it. And it starts up with a stumble - like a hit or miss till it starts idling smoothly.

What could be the issue ?

Amit

Four to five hours very closely resembles "Cold" from a fuel delivery standpoint.

The accumulator is of no use to a "cold" system, it is designed to maintain fuel pressure during the hour to two after shut-off when the heat of the engine will boil fuel waiting in the injectors. No pressure is needed on a cold engine as the pressure rises almost instantly with the fuel pump.

The Wayward Woman ('81 380SL) had this exact problem until I replaced the fuel injectors.