Livelli |
11-30-2010 12:08 PM |
Well, I doubt it's a glow plug issue, as it still does it warm. It could be a leaking injector, retarded timing, loose timing chain, bad IP, fuel filter (black smoke at idle would indicate bad air filter), blocked or kinked return system or line. If you can get a vid up of it running we could give it a more definitive diagnosis. Smoke is a symptom, but so are idle(high and low), engine movement or vibration, smell (only seen one guy diagnose smell via a video, but it was real freaky looking), and a host of other quirks.
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As a side note, black smoke is a result of too rich a mix of fuel/air going through the cylinders. Often, this is seen when trucks at rest suddenly are given a healthy dose of right foot. The fuel flow from the IP is increased but the air is not immediately increased to compensate due to the turbo spinning up ("turbo lag"). The result is a flume of black smoke (unburned fuel) out of the exhaust. On a 6.2/6.5, we have aluminum pistons. These were prone to cracking and even melting (often seen as holes through the piston) due mostly to a leaking injector. The excess fuel would contribute to heat as well as the concentration and conduction of that heat causing major engine damage. This condition is also replicated when too much fuel is added via turning up the DB2's fuel screw, as many do this in effort to gain the black smoke. We all see the Dirtymax and Cummins guys with the black clouds streaming from their exhaust stacks, and some people think this looks cool. Others who want a 6.2/6.5 to last as long as it should but still get some noticeable power out of it will seek other means of looking cool. Cool factor goes down exponentially with the hood up, the truck on a lift, or a puddle of somethin' underneath. Just my two cents.
And anyone who wants to put a big big lift on their more-money-than-sense-mobile so they can fit those big 40" boggers but has no idea what "gear ratio" means needs to put down the wrench and back away. Just back away.
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