I have been making and running my own biodiesel for about 4 years now. Ive had my diesel tested to meet ASTM and it did/does. Starting this summer however, my truck (when running biodiesel) will throw either high fuel rail pressure or sometimes low fuel rail pressure. The idling fluctuates as well. Once the biodiesel is out and I have run a tank of reg diesel through, all clears up. So I figure since the biodiesel is a little thicker than reg diesel that somewhere, Im getting clogged....But where? What am I missing? I have put in two new fuel filters, replaced the filter housing...I have tested and tested my biodiesel and it checks out...Any ideas would be greatly appreciated.
Its a 2006 LBZ with 80,000 miles...Thanks
How have you tested your fuel? What was specifically tested to deliver the verdict of "ASTM"?
Was tested a company who does ASTM testing for various other companies...no not cheap but worth it..AS well as it passes every test we home brewers do at home. Im stating that to let everyone know Im not just doing a rush brew and gassen up.. I check and recheck...Now anyone have any ideas what may be the problem??
Get a lift pump. I got the AirDog II 165. Easy install and no more wierd rail pressure codes.
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Your injectors are likely partially clogged. I have cleaned a number of sets of these injectors where biofuel was used and have found them clogged partially or fully.
Your symptoms are precisely what the other vehicles had.
Specifically the running with diesel versus bio situation.
Contact me at Dmaxwrenchkit.com
for help with this
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