Volvo 240 intermittent starting

Hi all,

It's been a while since I last wrote anything here, mostly for the
reason my 1990 Volvo 240 has been working without much of problems.

However, during last winter it developed an intermittent starting
problem --- it cranks fine but it just won't start. In the spring ---
it was in a shelter over the winter --- the first time I attempted to
start it, it would take some two minutes of cranking and turning the
key to off position several times between the tries before the engine
started running. First hesitantly, but after some 15 seconds it ran
fine.

It has showed similar symptoms a few more times since that, usually
when it has been without use for days.

I vaguely remember hearing a few bangs in the exhaust back in the
spring but I'm not fully certain about it. Both of the fuel pumps are
fine; the in-tank pump was replaced during the past summer.

I didn't hear any fuel pump noise before cranking. Shouldn't it run
the pumps for a few seconds when you turn the ignition key away from
the "off" position?

It's got B200F with JetTronic 2.4 AFAIR.

Any ideas where I should start looking for the problem?

Kind regards,

--
Sakari Ailus
http://www.iki.fi/~sailus /