3406e bad ecm? Missing, sputtering and white smoke at startup

I had this same problem. I replaced every component relating to the fuel system. It turned out to be a broken cam sensor and the cam shaft gear had jumped one tooth taking it out of time.

 

Jumped a tooth? Or was put back a tooth out at some point?

 

agree.

 

We had a customer rebuild a cat and it ran like crap when he started it. Turned out it was a tooth out of time. He inisisted it was like that when he took it apart....

 

As far as Cat told me, it jumped a single tooth. They removed the gear and placed it back in its proper place. My receipt reflects this as well.

 

Gears dont jump teeth... if it did that you'd have no teeth left. Either the back lash on idler gear backed way off and altered the timing or it was assembled wrong to start with . But let's set the record straight . Gears dont jump teeth if everything is in good shape in the front structure. They just dont.

 

This ain't your daddy's Chevrolet 350 with a timing chain!!!

 

Indeed. It happens when someone is too lazy to set up the idler correctly when the head is off for service. Change the head and it can be a ways off for sure. Matter of close enuf instead of spot on.

 

It ain't my daddy's Cadillac neither. I'm giving you and whom ever else that may be experiencing the problem of white smoke and misfire a good diagnosis. I went thru the entire fuel system replacing parts. Finally, I got to the point of not knowing what else to do and the shop is 7 min away. That is where I drove it to.

How it jumped (how it was described at CAT) a tooth and what caused it is unknown to me.

 

It says it was out of time by 1 tooth..

It does not say it jumped a tooth or skipped a tooth.. big diffrence.
It was assembled wrong from the get go, plain and simple.