YOU got me!

My fingers are faster than my brain, and my fingers get confused on meanings.


so now they can come out of the closet......those interior guys!

 

OK, asked this once before somewhere else. Has anyone measured the 04 DP, which is sans the pretty aluminum wrap to conceal the debotchery that was performed on the 03 down Pipe by the engineering staff at Ford?

I hate to contradict the moderator, but this is exactly what Ford did to the Navistar engine.

(Ford, International, and a few of their closet friends probably spent millions designing this motor. They still have a little work to do, that notwithstanding if it would have needed 4 DP then they mighty have put one on. It is designed to run with a cat, for many reason. Not just sound and HP. A motor as designed to run in harmony with all its parts, each and every one.
They do not build these things and then start adding parts.)

The added junk to a good basic design, that caused a whole host of problems. Poor performing PCM, Grouped sensors, a crappy wire harness, hoses that rub on places they shouldn't. The list goes on and on.... ( I believe including the cat, as the Navistar trucks don't have them, due to weight ratings)

Heck they didn't even let Siemens know that they were going to use a split shot stategy with the injectors, so add crappy programming to the list. You really don't think that they actually talked to each other do you?

Just being a little sarcastic here Timmy, to make my point. I know they at least should have, but it doesn't seem that they did it right if they did. I think you see my point.

Mark Craige of DPPI exhaust fame, said that they originally had the 4 inch DP but went back to a 3.5 for performance issues. Fit is also a problem(less customer complaints may also be the reason for the move back down to 3.5 inch ), as there is not enough open space between the firewall and engine to accomodate the 4 inch on all trucks.

As far as back pressure..... Well, I cannot imagine, except for perhaps velocity( smaller pipe faster flow) there being a reason for it.

Ford says a lot that doesn't make a lot of sense.
example
Ford also says not to run farm fuel(which should be fine if you are a farmer, and off road, as farm fuel tends to be better than what we get). And only low sulfer. Ummmmmm. The sulfer lubricates, so why would that cause damage, especially in an injector that is subject to side loading wear? Can you say EPA. Of course they would also have a higher incidence of blocked cats. And God knows they have to make em last past the warranty. So of course the party line will be what is in the book.

Ok, warranty. Some dealers say a muffler delete pipe voids it, some say an open exhaust voids it, some say removing the cat voids it, some say as long as the cat is retained, you are ok even with a new DP. I guess the best is to ask the dealer who services your vehicle, if they are ok with whatever...... Then can you believe them? Unless it is writing?

Sorry for the rant. ANOTHER bad day. Yes I did work today.

Lariat

 

Lariat, the farm fuel thing is a tax thing. Diesel fuel is way down on the refining process. Uncle Sam wants his money. Ford don't want to run afoul of the tax people by saying anything that might get us to run fuel that would avoid one of their revenue streams.

 

It is good you can speak your peace..........Lariat!

 

Thank God for places like this. And Thanks, to you Tim, and Ken for keeping this one afloat.

SBV, yep that is for sure another in the list of reasons, but I doubt highly damage would be one of them. Except of course for the Cat. This is why everyone, including Ford and Tim are advocating the use of fuel conditioners. Should help ease the lack of lubricating qualities of the "new and improved" low sulfer deisel.

Lariat

 

Read my last post on the additives out of the manual. In the manual they say don't use the fuel additives but in a subsequent SSM they do. Go figure. What, could the manual be wrong? Like in 15 qts? Can't get anyone from Ford to explain.

 

My belief is they are learning some new things as fast as we are, there is no doubt anyone (Ford) could figure out if you have 94’s run Stanadyne or anything to help those pesky 94’s out. That is why the SSM, can you imagine the 94's when it is -20 with out a PI and thick fuel.

IMO

 

Intercooler Hose Blow-Off:
If one of the hot side intercooler hoses blow off it will cause the truck to exhibit a low power/low boost condition. To service, replace the hot side intercooler pipe/hose assembly. Clean the hose mating surfaces to ensure the hoses will stay in place. SEat the hoeses completely onto their mounting surfaces before tightening the clamps to 9 ft/lbs. Test drive the truck while monitoring the boost pressures, which should be 22-25 PSI. An overboost condition will cause the hose to blow off. Broadcast Message 1099.
Single alternator trucks: 4C3Z-6C646-BA
Dual alternator trucks: 4C3Z-6C646-CA.