Volvo Repair: 1992 Volvo 940 cuts out, flash flash flash, example 121

Question
Our Volvo cuts out completely or loses power but engine still running, then shortly after car will start and run OK. It may happen once or twice but then run for hundreds of miles OK. Lately it is happening more often.Volvo just a 4 cyl., not a turbo.Changed fuel pump a few years ago and recently tuned up,cap, rotors,plugs,wires.

Answer
many things can cause this type problem.I would try checking for diagnostic trouble codes below is how to do so.other than that it will need to be looked at for a proper diagnosis.




in 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.