Volvo Repair: 940 Volvo non turbo 1993 sedan, flash flash flash, example 121

Question
Intermintent lack of spark....
car will not start / plenty of juice to crank/ good fuel/  but no spark / new rotor cap and leads and plugs/    will try starting car tru the day with no sucsess... then it will always start the next morning.  am I going nuts?

Answer
first check for codes in the fuel and ignition system below is how to do so.if you get a 214 codes in socket six replace the engine speed sensor located behind the head by the firewall it is bolted to the top of the trans. bellhousing.




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.