I had a similar problem from Jungheinrich.
Nissan Motor.
VN coil was located in the distributor.
1 of 2 coils burnt
Others got in the mail
The first thing to do is adjust the intake and exhaust valve. If this is a k21, with 4 ignition coils, you can unplug them and swap the coils around. If your spark plugs are worn out, the coils will go bad.
Hi!
I have a problem with engine Nissan K21072686!It is seems like 2. and 3. piston doesnt work,I replaced control valve, cap an electronic, but again the 2. piston like it doesn't work???!!
If You have manual for this engine, it would be great!Just to see what can be wrong...i was talking with many mechanics , electronics ,but i didn't solved problem!
Best regards!
Dragan
head bolts: 51 ft lbs
Valve lash.015 with engine hot