J.D, thanks a lot for the response. The truck is indeed an F250, '85 with the 5.9L engine. I like your assessment. The timing is the only one of the three causes that I could see being related to the fuel. I will keep loggin more miles and see if the problem keeps up. I think today I'll take a drive down to Reno to make sure the engine is good and warm. I think I will wait until I have developed a more reliable bioDiesel supply and then have the engine tuned and timed around that fuel. I'm also skeptical of this batch of fuel. We'll see how the smoke goes if I can get some commercial B100 to rule out fuel impurity issues. The guy who made my fuel usually only washes batches that are going into his girlfriend's new Jetta, so I can't rule the fuel out.
Thanks for the response, Steve Steve Murphy Mapping Technician Truckee Donner PUD (530) 582-3943 >My thought is that blue smoke is usually caused by 1 of 3 things >1) Oil being burnt, blowing by teh rings or valves >2) Timing too far advanced or too far retarded >3) Engine too cold >I will assume its not #1. You'd have noticed that on B10 or petrodiesel also >I lean towrad #2. Biodiesel has a higher cetane rating than petrodiesel. >Timing is set according to cetane content. >I would also think its not 3, not at least if your engine temp is in the >right range. We'll assume its timing then, but thinking about cetane >always gives me a headache. I can't remember whether timing should be >more retarded for higer cetane or more advanced. I do know that many >environmentally conscious individuals suggest retarding the engine's >timing 2-3* to overcome BD's higher cetane, so I guess you're probably too >far advanced. I would suggest getting the timing done on the fuel you >want to use most of the time at a good diesel shop unless you have a >timing tool yourself. First lets find out what type of engine this is. >You say it has dual tanks, so I'm assuming its a Ford F-series. Is it a >powerstroke, a 6.9 or a 7.3 IDI? With the IDI, you could retard teh >timing a dime's thicknessor two and see if it makes a difference. If its >a PSD, you'll need to let the pros handle it since its computer >controlled. On an IDI, you loosen the 3 injector pump mounting bolts and >rotate the pump itself. Be advised, you won't get much movement out of >it, just a hair, but a little makes a lot of difference. BTW, you rotate >it toward the driver's side to retard the timing and toward the pass side >to advance it. I think its timing. Look into it. >J.D. > [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> Yahoo! Domains - Claim yours for only $14.70 http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/