dynamic airflow goes to 0 during pull. Air mode normal > highspeed
Long story short this should be a OL SD tune. I get both maf hi and maf lo DTC's set.
PCM keeps intermittently cutting dyn airflow randomly, usually during pulls. Some go fine, others dyn airflow drops to almost zero. Always at 4400 RPM. I'm noticing airflow mode is going from normal > high speed around 4100 RPM. Which i believe means MAF? But its failed and physically d/c. VE doesnt seem responsive past 4100 RPM either. Not sure if its related.
Last edited by itsdaveonline; 05-22-2019 at 09:18 PM.
Look at my ve table, specifically the value in cell 4200rpm & 122kpa. shows as approx 2328. Although now look at measured ve airflow pid on pull 2. Why does it drop to 701? Clearly something funky with airflow calcs.
I don't see any holes in the vve? Is this a bug?
Also the calc'd airfow mode "blips" right after the airflow incident? also changes a bit before.
Last edited by itsdaveonline; 05-22-2019 at 09:27 PM.
Reply With Quote