Low Idle and Stall when Warm

[FrankieG]

Recently, my 82 911SC has experienced a odd issue. The car can be standing unused for weeks, and it starts up right away. Never has a problem on cold starts, except for some white smoke occasionally. The problem is that after driving the car, and then shutting off the engine, on restarts (after sitting for a little while), i have trouble keeping it running, the idle drops and unless I keep giving it gas, it just dies. However, once I start driving again, after a minute or two, it runs fine. Any thoughts? Thanks

[Fast Corners]

A bad fuel accumulator causes poor hot start characteristics.

[FrankieG]

Thanks - is that a major repair?

[Gunter]

Without knowing more about the general condition or maintenance of the engine, it's all just guessing.
Hot start issues:
Check valve on the fuel pump.
Accumulator.
Fuel filter.
Vacuum leak.

And a few dozen more......................

[Miguel Antonett]

It could be a gummed up fuel distributor due to "old fuel" in the system - lack of use.
I would replace the gas in the tank with fresh 93+ oct, add concentrated Techron and take the car for a long/spirited drive with lots of WOT. That might flush the "bad stuff".

[Fast Corners]

Gunter is correct in that there are other things to check but, judging from your description of the starting/running behavior for a hot motor I would bet on the accumulator. A gummed up fuel system, clogged filter(s) vacuum leaks, etc. would have a tendancy to affect the performance either when the car is cold or hot.

A fuel accumulator is not a major repair. A few wrenches, some busted knuckles and your done. It is the olive drab cannister thing on the back left side of the engine compartment.

[FrankieG]

Thanks so much for the responses, at least I now have a starting point. I'll check out the accumulator.