EC240B 81066 Intermittent Fail to Crank

[funwithfuel]

Id be really concerned about that high rpm reading. Im not trying to paint a picture of doom n gloom but thete were rare cases of cam failure over near #1 & 2 where the follower would crap out and damage the block. Something to check for

 

[Se.la]

Normally if you have no error code the trouble is mechanical

 

[funwithfuel]

Just had a thought. Diode 13( the little black and silver fuse looking things) on the bottom of the circuit board/ fuse panel. Have you tried swapping with another? Or if you know how to test them, can you test?

 

[watglen]

Replaced the Engine control computer and its fixed. Running good and back to normal.
Likely have $10,000 on this repair. Ouch! Time to get to work.

 

[funwithfuel]

Ouch!!!
At least she's up n running. Thanks for following up.