sprinter 310 starting problem

[dandmquinn]

I have a 1998 310 Sprinter,200k + miles,generally runs well but it has developed an intermittent starting problem which is prooving difficult to identify,garage have given up on ideas!!.It makes no difference if engine is hot or cold it just starts sometimes but on many occasions wont.It turns over OK,fuel system and injectors have been checked.If you keep on trying it will eventually start but for no apparent reason-sometimes 10 or 20 attempts it wont.When running it is perfect.I was told to check out key coding but was told that if key was at fault it would never work.
Any ideas?
Thanks,Dec

 

[Xtractorfan]

Possible CPS. also possible fuel problem, where the fuel runs back to the tank when the engine isnt runnng..also think from memory sprinters had a wiring loom problem ..in the general battery box area??

 

[dandmquinn]

CPS? What is this?Fuel system has been checked out,thanks

 

[dandmquinn]

Sorry,Crankshaft Position Sensor.This has been replaced also