this has happened only 4 times in the last 4 years till about a month ago. (happened twice in 2 days)

with key on i get the glow plug light and CEL on but no power to the pump (FASS) and obviously no fuel pressure. it will crank, but nothing on the tach.
I've tried plugging in a scanner and it doesn't make a connection with the pcm. all lights work and gauges work (tach and speedo are at zero obviously)

before i couldn't pin down when it happened due to being so intermittent. but the last two times it has happened it was when i started it and drove somewhere close before it was at full operating temp. (and in retrospect the previous times was a similar situation).

she'll start fine cold, and when at operating temp.

when it happens i pull the batt cables let it set. reconnect and within a few tries works fine.

any ideas? pcm going bad? is there a sensor i need to check?

new motor has about 25k on it.

thanks.

 

Is it a "no connection to the PCM" all of the time or intermittently? Could be a blown fuse to the OBDll port but I don't remember which one. I believe some are different on the 02' and up.

 

only when im having the no start issue. otherwise it works fine and can connect no prob. theres no codes either after.

 

Sounds more like a loose/bad connection then. Close enough to the OBDll port to not affect other things that would throw a code.

 

i checked the pcm connectors and any other ones that i could get to.
the fact that it only (seems) to happen if i shut it down shortly after a cold start is odd though. if its cold or warmed up it works fine.
it got all new oem sensors when the engine was rebuilt.