This is not on subject, (DATSUN), but some of you might own a Ford 6.4 Powerstroke and could find this informative. I have been driving Ford trucks for 30 years and love them, (no Ford jokes please). In my last truck update I decided to go from the F150 V8 to the F250 Powerstroke diesel. I tow periodically but most of my driving is in town. I found that the engine was in constant cleaning mode and that it never completed the cleaning cycle. This was causing extremely high engine compartment temps as well as extremely low fuel economy:angry:. I took it to my dealer and their fix was to reprogram the truck so it did not let me know when it was cleaning and told me that when it goes into cleaning mode to drive it at 50mph + until the cycle was complete. Do you see the problem with this, the information center no longer indicated when it was in cleaning mode! When I requested clarification on this I got a simple shoulder shrug and was told to remove my K&N filter and cold air box or they would void my warranty. I removed the K& N and continued to have in town drivability problems. Although I love the truck I listed it on Craig’s list due to the continuing drivability issues:cry:. Yesterday I bit the bullet and ordered a H&S Mini Max programmer and a new 4” aluminized exhaust system (DPF & Cat delete):classic:. I will install this next week and put the K&N system back in place. Ben at Rudy’s Diesel, (Durham, NC) say I will kick my own A**:stupid: for not doing this sooner. I believe the gains will be worth the sacrifice of the remainder of the warranty. I will update this thread as I have the results of the modification. jlp

Yeah, I'm interested. My next vehicle may be a diesel truck. It would be for sure, but I dont want a dodge, or a chevy, and Toyota won't sell them in the us.

I installed the programer and reprogramed the truck, cat and DPF delete. Removed the cat and dpf (4" replacement exhaust) and instlled the K&N air box. Fuel econ up, power can be dialed way up. Still testing but it seems to get better fuel mileage on the higher horse power settings. The truck is super fast with the additional 250 hp dialed in. The transmision is still learning to deal with the additional power. Will update when I have had a chance to do more testing but so far I am happy with the upgrades. JLP

21'st century DIY....I love it! Congrats!