I am having some power/torque problems. Here's what I have:
1) 2000 7.3 PSD F-250 Short Box
2) 60 hp "mild" Superchip chip purchase way back in 2001.
3) AFE Stage II Air Filter Kit
4) 4" Exhaust and downtube including Flowmater silencer
Other useful information:
No black smoke that I have ever seen.
Engine seems to run fine.
I do use Stanadyne Fuel additive.
I get fairly good mileage when not towing - 18mpg to 20mpg at 75mph.
I get 9 or 10 when towing the trailer at 75mph.
New fuel filter.
Fresh Oil (Delo 400)
No 'puter codes.
The problem seems to be low torque.
It takes a long time to get up to speed and it now stuggles to pull hills out of overdrive. Truck is used almost exclusively for towing an 8000 lb, 12 foot high trailer. Truck does not "pull" as well as it did when I had only the chip and a K&N Air Filter. I installed the exhaust to keep temps down/help air flow, and the AFE filter kit when I discovered fine dirt particles occasionally getting past the K & N filter and was hoping to gain better mileage and power too. Besides what seems like low power/toruque, I am also getting serious turbo flutter, and I hear quite a bit of air filter whistling (the filter noise is no big deal.) I could really use some help to solve this problem. I've screwed up something. Any help appreciated. Thanks.