As previously pointed out maintaince is the KEY to these engines, the Ford workshop manual has no mention of cab off repairs on these but I think the one you're referring to is the 6.4PSD which most of the repairs call for cab removal. But again most can be performed with the cab in place, it...
9389265 9389101 N/A - New calibration to address idle surge condition
Mine had that done shortly after I bought it, the dealer claimed it would fix a surge concern that was actually caused by a plugged trans cooler..... go figure.
From what I hear the Edge Evolution will give you about 2-3 mpg better and the Diablo will do about the same. The guy in the next bay has the Edge on his 6.4 and gets about 21mpg in tow/economy mode.
Sounds to me like the IAC motor stuck partially closed, let it idleand uplug it and see if the rpm drops.If not replace the IAC ( idle air control ) ;)
Actually the 6.5 has a ton of low end torque, mine just suffers while pulling over 1700 RPM. Unloaded it runs quite well .... sometimes too well, especially after the injectors and the 4" exhaust. Funny thing is mine has a very distictive rattle.... different then any other 6.5 I've heard and...
Ok I'll need more info on that... does it more hot or cold? any other lights on in the dash? Have it scanned? Fords have a ton of performance codes that DON'T turn on the check engine light.
Reminds me of the time I pulled out of the local GM store after ordering some filters, traffic was heavy and I had to get on her to get out, long story short I ended up sideways across 3 lanes of busy city streets.... Manager met me at the door asking what I had under the hood.. His response was...
I noticed a difference over 2200 rpm with the 40hp injectors, with a much smoother accel with less lag. Looking into the reflash next, to help pull the 5th wheel.
When it goes into regen try to find a spot to let her idle, it'll ramp up the idle and as long as you don't hit the brake pedal, she'll complete her regen in about 15 mins or so.... maybe longer if it hasn't been able to complete at least one full regen. :thumbsup: