I am fairly new to diesels as I have just gotten into WVO/bio-diesel this year. I am running a 92 Chevy 3500 6.5TD w/ 180,000mi on it. The engine overall is very much quieter and cleaner running than when I first got it w/174,000mi but this morning I noticed a ratteling sound and the emissions smoke is visible after it warms up. The truck performance wise seems the same but this rattle and smoke worries me. can anyone offer any ideas as to the problem before I take it to the shop?

injectors....pump....

If the truck is still running and driveable, I will move this to the 6.5L section.. Thanks

How are you using your VO? Heated?
Original Injection Pump?
What color is the smoke?

I have a heated tank mounted in a bed box but I really only keep it for fuel capacity on long drives, 55 gal's between the main tank and that, I primarily blend it unheated in the main tank. I'm in central FL, it does not get very cold, so I've been using approx 80/20 WVO to diesel or bio-diesel in the main tank. I might go to a 60/40 in the winter but will play that by ear when it cools off. I prefer to use bio-diesel which we make for about $1.50 gal as it cleans up the sludge much better than fossil diesel from the WVO that collects over time. I love to talk about this stuff and everything else related to getting us off of fossil oil dependancy so if you want please send me an email and help expand the community. P.S. I am absolutly not some limp wristed liberal weenie who will waste your time spouting socialist ideology. I am a proud, gun owning, for profit, Libertarian who only wants my country back.

Before you take it to the shop,

If you're running 80% wvo the fuel may have clogged the filter(s?) or filter trap or possibly be too thick for the whimpy stock liftpump.

Before condeming the pump and injectors, open the water drain at idle and catch the discharge into a bottle, (note how much flow comes out, fast, slow or ?) and then open the air bleed on top of the fuel filter to clear any air. If the truck stalls you have a restriction or OPS/LP problems and the shakes and smoke are the IP struggling to suck in enough fuel to run. I have also experienced a clog in the filter housing itself, which requires back blowing the filter housing from the IP out the water drain. I'd also consider back blowing the line to the lift pump back into the fuel tank to clear the sock of any sludge that's formed on it.

Let us know, there's not a wide range of experience yet on this subject but many are interested.