Did the 4.7 diode boost fooler

[groovey1]

Just for clarification ..Is this mod intended for chipped or programmed Powerstrokes?? I would guess the stock programming wouldnt get boost pressure close enough to have to "fool" the pcm anyway?..

Newbie ?? sorry..

[Blue01F250]

you are correct - you shouldn't need to fool the map sensor unless you are running higher boost - which is likely going to be because of programmers or bigger turbos or whatever

[dikdragon]

Can you guys help me understand what this diode will do for me performance wise? what will i notice different after installing this thing? Lets say i get on it hard, will this keep my turbo from dumping early? Hope you know what i mean,i am new to diesel life, and loving it!! thanx guys

[Lonno]

Its meant to stop the de-fueling once your turbo reaches its pre-set limit, whatever that is. Mine dumps at about 26/28.

[dikdragon]

So, when the turbo dumps, is that the big whooshing sound that comes from intake?

[dnf12908]

Originally Posted by dlonno

FYI anyone who wants to do this. I should have about 8 4.7 zener diodes left over by Monday. The diodes themselves cost about a dime but aren't the easiest to find. I'll mail anyone who wants the extra ones for free with a couple wire taps.

I would like to have one if you don't mind sending it. I'll PM you with my mailing address. The only reason I don't run my hot tune is because of the overboost code. This sounds like the fix.

[Lonno]

I've sent out 6 so far to ORG members, I got about 3 left if anyone else needs.

[Blue01F250]

Some people are running the diode - but teh trucks are still defueling at higher boost levels....

anyone have any idea waht the reason is???

I don't want to worry about installing one if its not really gonna work...

[Cj Ford]

Originally Posted by Blue01F250

Some people are running the diode - but teh trucks are still defueling at higher boost levels....

anyone have any idea waht the reason is???

I don't want to worry about installing one if its not really gonna work...

mine is still defueling... I dont know why I did it they way it was supposed to be done.. guess I may need to do it mechanically since electrical is not working on my truck..

so I still cant get the whole feel of the extreme setting

[Blue01F250]

sawyer1 said his did the same thing CJ -- said he was ordering some different diodes and would let me know if they worked or not... thought he may have gotten the wrong one..

one thing to do is ask Tony if his tunes change anything with how much voltage the MAP sensor see's or receives (ie maybe you're putting out so much boost at a lower voltage?!?!)

I have no idea if that is possible... but was just thinking outloud