bad egr valve?

motoman358 · #1 (**permalink**) 11-03-2012, 07:18 AM

My truck has been running pretty bad lately, it has a whiteish/blue smoke and occoasionally (when acceleration) puffs black smoke. It all seems to be intermittant, cant seem to produce the symptoms. Today after fueling up and leaving the station the truck stumbled really bad when accelleration (all the way home, approx 3 miles) and at times smoked out the cars behind me with a whiteish smoke. The truck is throwing the P0405 code which says a problem with the EGR system. Would an egr problem cause the truck to run this way? What else could the problem be?

**Term3** · #2 (**permalink**) 11-03-2012, 07:30 AM

Start out simple, pull the EGR valve and see if it needs cleaning.

motoman358 · #3 (**permalink**) 11-03-2012, 07:42 AM

Pulled the valve couple weeks ago and didn't look bad...

**Evil Eye** · #4 (**permalink**) 11-03-2012, 07:46 AM

stuck or sticking EGR valve can definitely cause these symptoms.

motoman358 · #5 (**permalink**) 11-03-2012, 08:39 AM

Took it out and cleaned, still dust look too bad... Will advise results after driving for a bit

**Evil Eye** · #6 (**permalink**) 11-03-2012, 05:59 PM

It could be bad electrically. It's basically a big solenoid, so the internal windings get weak or go bad completely.

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