Black smoke and hesitation, HELP! - Diesel Forum

rsutton3 · 03-13-2006, 08:23 PM

My wife's '04 PSD has started hesitating when accelerating and blows heavy black smoke. I drove it this past weekend on a 450 mile round trip. When you get on the pedal to pass someone, it spits an sputters, then finally goes on it's way leaving a thick black cloud of smoke behind. I noticed it blowing a lot of black smoke everytime we were heading up an overpass also. It has been doing this for about 2 weeks. Air filter is fairly clean, new WIX fuel filters, several tanks of diesel from different locations and brands.

Any ideas? [img]/ubbthreads/images/graemlins/confused.gif[/img]

trucky · 03-13-2006, 08:42 PM

If it were my truck I would probably be looking in the direction of the egr circuit, nuff said.

noa1794 · 03-13-2006, 09:13 PM

EGR valve and EBP (exhaust back pressure sensor) are the usual suspects for a 2004 for these symtoms. There are tech bulletins out on some of this so if you are lucky the fix may be free. Check with your dealer.

rsutton3 · 03-14-2006, 08:57 PM

Got it in to the dealer today and sure enough ... bad EGR valve 4C3Z 9F452 A. Runs fine now ... no smoke.

Thanks for the replies.