SunWizard's system on my 1993 Dodge...Help Please

For discussing the modifications needed for diesel vehicles to run with 2 tank veggie oil conversions.

Moderators: SunWizard, coachgeo

Postby SunWizard » Sun Dec 14, 2008 4:56 pm

You didn't answer this one:
"You could try feeling the VO hose before your filter, it should at least be hot to the touch (>120F.)"

Feel all the VO hoses, and change the filter.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
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Postby colonelsanders » Thu Jan 01, 2009 7:14 pm

yup, the fuel tubes into the veg filter are hot, i did change the veg filter and tightened all vac. connections. i have not done the draining of the veg tank and diesel tests(as suggested by coach). but i have ruled out this being a temp issue.
( im in southern cali now)
dont know if i mentioned this but if i run to long on veg w/o stopping and pumping the lift pump primer, switching back over to diesel does not restore fuel pressure fully.

i have good driveablility on diesel but do see a decrease in fuel pressure after around 100 miles. not nearly as drastic as on veg but still concerning.

would air leaks show as a fuel pressure drop...any thoughts on the lift pump primer restoring pressure?
"be the change you want to see in this world"
93' Dodge W250 CTD 4x4 Auto 170+ 2 tank WVO
One ton single wheel rear end
Piston lift pump retro fit

http://panamericantrip.blogspot.com
colonelsanders
 
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Location: Tucson, AZ...again

Postby SunWizard » Fri Jan 02, 2009 12:10 am

colonelsanders wrote:would air leaks show as a fuel pressure drop

Yes.
...any thoughts on the lift pump primer restoring pressure?

Maybe it pushes some of the air out.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
Site Admin
 
Posts: 1719
Joined: Mon Dec 11, 2006 2:53 pm
Location: N. Colorado

Halleluja!!

Postby colonelsanders » Wed Jan 14, 2009 6:01 pm

Auchems Razor: all things being equal, the simplest solution is usually the correct one.

well just to give an update in case anyone's wondering, we went on a drive to San Diego yesterday, the ip was so starved we barely made it to the auto parts store. I should tell you that i did the draining of my veg tank(put diesel in there)to no avail. also ran the lubro moly dp. so im ready to give up and figured the lift pump had to be going bad, pulled it out and......


the inlet of my lift pump has a small screen that had about an 1/8 of an inch of debris, restricting the flow of diesel and veg, I am an idiot!! Cleaned the screen and hazza! this should have been the first place i checked but hey live n learn. Im really good at taking things apart and putting them back together on my wvo system now!!! She's running great and the lift pump pressure is back to normal (15psi going down the road around 14psi WOT or under load)and i spliced a little inline filter just ahead of the lift pump.

thanks for all your feedback guys i hope someone can learn from this thread and not think im too much of a moron. Were off to the baja in a few weeks peace and love,
john
"be the change you want to see in this world"
93' Dodge W250 CTD 4x4 Auto 170+ 2 tank WVO
One ton single wheel rear end
Piston lift pump retro fit

http://panamericantrip.blogspot.com
colonelsanders
 
Posts: 26
Joined: Mon Nov 03, 2008 3:55 pm
Location: Tucson, AZ...again

Postby coachgeo » Thu Jan 15, 2009 1:51 am

Glad to hear it has worked out for you.

I actually feel bad that this didn't hit me. I have read about the IP screen in a several threads.... argggg.
Life; It's all in the Balance

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Postby colonelsanders » Fri Mar 13, 2009 10:42 pm

twas the lift pump screen not ip screen...just to clarify coach. no offense
"be the change you want to see in this world"
93' Dodge W250 CTD 4x4 Auto 170+ 2 tank WVO
One ton single wheel rear end
Piston lift pump retro fit

http://panamericantrip.blogspot.com
colonelsanders
 
Posts: 26
Joined: Mon Nov 03, 2008 3:55 pm
Location: Tucson, AZ...again

Postby coachgeo » Fri Mar 13, 2009 11:51 pm

no offense taken.

to avoid that make sure you have an inline filter you can see into before lift pumps.... or before anything that has a screen for that matter. Just too damn hard to diagnose if a hidden screen is plugged, that and you totaly forget the screen is even there; out of site out of mind kinda thing.
Life; It's all in the Balance

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Postby colonelsanders » Sat Mar 14, 2009 1:32 am

Yeppers, i've been using these, http://catalog.mercedesshop.com/item.ww ... eight=0.03 ... ordered about 10 of em, Clear and backflushable, working great and CHEAP!! I spliced one in just before my lift pump and can see it as soon as i open the hood, easy to get to, fine screen element, so they have excellent flow ;-)
"be the change you want to see in this world"
93' Dodge W250 CTD 4x4 Auto 170+ 2 tank WVO
One ton single wheel rear end
Piston lift pump retro fit

http://panamericantrip.blogspot.com
colonelsanders
 
Posts: 26
Joined: Mon Nov 03, 2008 3:55 pm
Location: Tucson, AZ...again

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