I´m having a hard time tuning my 350 with a comp 12-249-12 cam and raised fuel pressure.

When warm and ideling blm goes slowly from 128 up to 160 in a couple of minutes cousing the 02 to go rich and i get a code 45.

Another problem is, when driving around and letting off the throttle the engine wants to stall but recovers. Sometimes it stalls completly and thats no fun in traffic.

I have disabled DFCO but it did not help.

This only happens in closed loop.

I dont know whats cousing this. Please point me in the right direction!

 

Start with the basics, and make sure the mechanics of the tune are good.

I sounds lean, or like too much timing, to me.
Have you added timing in the low load areas?. If so reduce it...
If not, then try adding a little fuel in the low load areas.

 

There are a bunch of threads in here about how to adjust for bigger cams. I can't remember exact names but if you spend some time searching this forum on things like "cam" and "idle" you should find them. Oh... isn't there a sticky on that in the 730 section??

Do some searching, you'll find it.

 

The bin is anlw5469 and the only things i have changed so far is the bpw and ve1 table.

Its only in P or N the blms goes up, when driving around blm is at 128-130 in those cells.

Also idle rpm goes up to 1000 rpm when engine is fully warmed up.