boost leak - Diesel Forum

larry-56 · 03-11-2010, 09:47 AM

I have 03 7.3 f250 first thing in the moring when I start it and don't let it warm up when I mash the go pedal I get alot of black smoke and a very noticeabal loss of power. When engine warms up it runs great no smoke and pleanty of power. Last fall did same thing and tightened all clamps and it fixed it tightened all clamps this time and did not work. I do have alot of oil or soot around the orange boot going into the intake on drivers side. Sorry for the long post and thanks in advance for any help.

Larry

**klhansen** · 03-11-2010, 02:01 PM

Your "problem" is probably the exhaust back pressure valve working like it's designed to. It restricts flow thru the turbo (and reduces boost) until the engine is fully warmed up. It does open when you hammer the go-pedal, but can't do that instantaneously, thus the black smoke.

larry-56 · 03-11-2010, 06:16 PM

klhansen,
Thanks for the reply but I have another question,this morning it was about 38 degrees started it up and took off and it smoked very little if at all and yesterday afternoon it was about 65 degrees and I started it and took off and could not see behind the truck for the smoke question is could this still be the ebpv.
Thanks Larry