First impression-FICM REPAIR/ATLAS 40 tune
Installed my rebuilt FICM last night, Ed Stefan, as usual, came through in a timely manner. I was concerned my truck would be down for the big "Superstorm Sandy" event, but I was pleased to see the FICM here when I got home yesterday.
Put it in last night, (boy that last plug is a pain in the azz with that coolant line hanging over the FICM) plugged everything back in. I had my batteries on charge while the FICM was out for repair, so I disconnected them while I worked to allow for a VCT re-learn when I restarted. The truck started right up, and sounded great, FICM voltage holding 47-48.5. I allowed the truck 5 minutes idle time to re-learn then went for a 20 mile test drive of different driving conditions. (pulling grades, full throttle, etc) I was impressed right away with throttle response, it was definitely improved, not astounding, but snappier. The truck definitely had better torque, I noticed much less push on the accelerator to get up to speed and hold speed. What was wild though, was on a smooth, straight, stretch of road wet from the storm, I kicked it into passing gear, and the rear got squirrelly at 65-70 mph! YOWSER! It never did that before, and my tires are in great shape. Overall, I can see where the Atlas 40 will save fuel, (with less throttle input) and will definitely pull better (PHP's graph of the Atlas 40 shows a HP increase to 365, and torque to 700 lbft, YEOW!) Did I experience stunning performance? No. Improved, definitely. I feel it is definitely worth the extra coin if you need the FICM repaired anyway. I'm still running my stock exhaust and cat, I'm planning on getting a cat delete pipe, I'll see if that untaps a little more juice. But overall, I'm very happy with the results, thanks Ed and PHP, nice package!