I'm starting off my tuning with idle. I can smell the car running very rich, the (heated) O2 verifies this, but the BLM pegs at 160. Looking at the datalog, it looks like the INT slowly comes down but then the BLM dips suddenly and the INT goes back up and it runs rich again. Then this repeats. I'm suspecting that maybe the car is running so rich that the INT and BLM can't compensate correctly. Where the BLM dips momentarily, injector PW goes from 4.x ms to 2.x and the car sounds much happier. I'm thinking I should lower VE 20-30% at idle. Does that sound reasonable? I also tried holding engine speed at 1,000 then 1200 and 1500. PW immediately dropped at those speeds even though the VE at those points is about the same as 700RPM (64%).

I'm using an AXXD bin just modified for basics like injector size, cylinder volume, base timing, etc. Engine is an L98 with LT4 Hot cam (218/228 lift at .050, .525/.525 lift), 200cc Pro Topline iron heads, LT1 intake, shorty headers, 9.5:1 cr.

Here are a couple graphs of what I'm looking at. Click the link if it's hard to see the graph.
http://i23.photobucket.com/albums/b3...rpminjpw-1.jpg


http://i23.photobucket.com/albums/b3...g1blmint-1.jpg

 

Try disabling closed loop and see how the car responds.

I had a similar issue recently with a truck I was tuning, though it was removing fuel.

The O2 sensor had gone bad, and was reading rich all of the time, even though my WBO2 was reading stoich or lean the only crosses were during full DFCO. This caused the ECM to pull as much fuel as it could (BLM around 99), and because of that, the truck ran poorly. Disabled closed loop, truck ran amazing, replaced the O2 sensor this afternoon, and after a few more tweaks the truck runs just the way it should.

 

Just curious why you are starting with a axxd on a 355 ?

 

I'll try locking it in open loop but while the car was warming up and in open loop it had the same behavior. O2 was reading rich and I could smell and see that it was rich.

I'm using AXXD because I have a manual transmission (T56). I initially tried Super AUJP but had some issues... probably my ineptness lol.

 

ok just curious, I would have started with a axcn changed the sa to a lt1's and remove the oil temp error. And start to refine the ve. Just a opinion. It's hard to see but is the timing retarding while this occurs.