Two Questions.....

[bassn5150]

On a 06 6.0, at start up, it sounds as if its in a regeneration mode, like the 6.4. It sounds almost jet engine like. Also, at about 55mph, it has a slight miss. Either speed up or slow down and it goes away. Other than a 4in. exhaust, the truck is bone stock, to the best of my knowledge. This truck is relatively new to me, so just trying to figure out these symptoms.

[Galaxie]

Are you sure your are not hearing the deep tone of the motor starting before the turbo is spinning fast? Also at 55, are you sure you are not hearing your injectors shut down (like when you take your foot off the fuel)?

Post a vid

[Galaxie]

Also at idle some stratigies will flex the veins in the turbo (thus you will hear turbo sound then deep sound and so on...)

[bassn5150]

Well, I may jumped the gun a little on the exhaust. After reading some older threads on exhaust note, I believe it's just the nature of the strait pipe. But, as far as the miss, it seems like it happens right before the truck goes into overdrive. Either speed up or slow down, no miss. Otherwise, no idiot lights on, no other symptoms of any trouble.

[Tuscany]

Injector spool valves are going bad would be my guess. Mine did the same thing, called Jesse Warren of Warren Diesel and he explained what happens and what causes that. I replaced all 8 injectors with his when I did my gaskets and studs and never had a problem since. I suggest you call and talk to him and he will guide you in the right direction.

[bassn5150]

Thanks for the heads up! This is my first venture into 6.0 territory. We've had half a dozen 7.3's in the past, but finally had to have a 6.0. Awesome info here on the forum. I'm sure I'll be asking more questions before its all said and done.