Volvo Repair: Volvo 1989 240, coolant temperature sensor, flash flash flash

Question
I have a 1989 Volvo 240 fuel injected.
When the engine is warm and I turn it off
for 1 to 2 hours it is hard to start and keep   running
It starts fine when its cold or after being shut off for a short period of time.

Answer
it could be many things from a bad engine coolant temperature sensor to a bad air mass meter.I woudl tryr checkign for trouble codes and go from there. below ishow to check codes



n the engine bay on the drivers side near the strut tower there is a small black box with a wire attached to it.place the wire in the terminal marked 2.turn ignition key on (not started)press the small button for 1 second and the code will be displayed as a series of flashes.a red led displays the codes.the code will be three digits.small pause in between flashes for a single number long pause between flashes for the next number.example 121 will be flash.....flash..flash.....flash.repeat three times or until first code repeats itself.to erase the code after all codes have been checked hold the button for a good 5 seconds then release the light should light steady,then press for another 5seconds.this will erase the codes.  email me the codes and i will tell you what they are..socket 2is the fuel system 6 is ignition.