[dieseljack]

Hey guys,

I'm experiencing poor fuel economy, black exhaust, low power, and a "knocking" sound when cold. The Bentley bible attributes these symptoms to worn or faulty injectors. Oh, and there's also a huge cloud of blue smoke at cold start. I mean like cover-half-the-block sized cloud. This also seems to support the theory of worn injectors dripping fuel into the cylinders at rest. The pickup has 150k miles on it and I'm pretty sure no one's ever messed with the injectors.

I've been told that they get out of factory spec range by 100k. I've also been told it's about 200 bucks to have them rebuilt. Any of you ever tried to rebuild your own? Is this possible without a spray testor/other special tools?

Any cheap DIY tricks, humble opinions, graciously accepted.