read the word default as engine derate. it will limit boost to about 21psi. it wil lack soem power and the check engine lamp will come on.

and your very welcome.

 

This stand up comedy gig is harder than I thought. It might help if I had a better grasp on the English language. I was close. The word I should have used was achronyms. Is it funnier now...

 

Hey, I was joking with you. But I do type like crap...

 

Thanks Cheezit!

What would cause it to trigger the p0401 code if the EGR was still installed and hooked up?

 

My EGR started giving me problems a month ago. Stumble loss of power and black smoke. Cleaned the valve which was not very dirty and still had the same issue. Decided to test it with the valve unplugged and that resolved all the issues. I've been running it that way for about a 1,000 miles with no issues. Towed the trailer with it a couple of weeks ago and the coolant fan and AC works as normal. No check engine light and the scanner shows no codes. I still have the EGR cooler in place and going to continue to run it this way as I see no issues doing so. My last reflash was in July 04 six months after I purchased the truck.

Brian
04 F 250
EXT cab 4X4
XLT
50,000 miles

 

I believe it would be lack of EGR flow measured by the IAT sensor in the intake manifold. (Hope thats right.)

 

Matty,

I saw the JK in the post. I am a little embarrassed at my English faux pas. Thanks for calling it to my attention. You did not mention if it was funnier now...

 

yes. you will need a tune to avoid the p0401.

 

just to add more info I run the previous flash #7 and Matt's tunes thru an SCT I have not experienced any issues ,, I kind of avoided the latest flash because of many recommendations ,, this is a great thread ,, I will start looking into my #'s a little more

 

I wonder what the difference is when running a custom tune? Gear heads doesn't show a code with the egr unplugged , Eric's will , it doesn't throw a CEL but the code is in there
I wonder if I can read fan speed with my A?E? I will have to check this out thx

 

My truck turns out to be an early '03. I have blocked off the EGR cooler and left my EGR valve plugged in. When I first started playing around with it, I found that it ran slightly better by just unplugging the valve with no other modifications. I did not leave it that way, but neither did I get a CEL. Later, after I did the modifications I cleared the memory with the batteries disconnected and have not had any CEL. I don't have the right kind of code scanner but my simple scangauge shows no codes. I don't think it can read the different layers however. As far as boost, I seem to get at least 20. I'm reading the MAP sensor with my Scangauge and doing the math on the fly but the truck seems to haul just fine.

So, maybe the '03s do not have the same programming as the later years? Is this what others have seen?

 

OK, I've been searching till my eyes are beginning to cross. Now, it's all about me, alright?

I have an 05 F350. I just did the egr delete. My egr is still plugged in but the cooler is G-A-W-N gone. Now I'm getting that pesky old CEL. Soooo, now it's confirmed, an 05 needs the tuner. Please set me straight on what I need to do next.

As I understand it, I need the SCT X3 with custom tunes. Where do I get one of these thingys at the best price and what are these custom tunes I need to order with it? Please help as I'm ready to lay the green on the table and want to do it right the first time.

Thanks, Tim

 

this is fact and it is stated in the thread somewere If im not mistaken.

 

you need an sf3 or an x3 either will work. Ive tried a few tunes from here and there. As of right now im running one of sct's canned tunes and no light all seems to be functing fine and no light.

 

SCT and their canned tunes now allow you to turn off the egr. FYI, these are the new tunes SCT installed on my XF3.