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post #1 of 99 (permalink) Old 08-17-2012, 08:29 AM Thread Starter
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2 Bad Injectors

I had all my injectors cleaned and bench tested last year. My truck was running awful and I had them pulled again. I had 2 bad injectors that were gunked up and couldn't be cleaned. What can I do to remedy this situation.

I run WVO. I centrifuge it and let it sit.

1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
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post #2 of 99 (permalink) Old 08-17-2012, 08:42 AM
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Do you run heated WVO? If not, you might need to research blending.


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2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

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post #3 of 99 (permalink) Old 08-17-2012, 09:36 AM Thread Starter
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Yes. I have a GFS set up and PA Biodiesel setup.

1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
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post #4 of 99 (permalink) Old 08-17-2012, 11:08 AM
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i have a few ideas that pop to mind.

have you or do you ever run wmo also,theres your problem
do you use a 2 tank system,starting and stopping on d2 ??
your cleaning process,has a flaw.better go over it again and see where it's broken
your injectors were from a crappy e-bay, re builder,and would have failed on d2 also
you starved and scored the injectors by clogged in tank fuel screens,better do the hutch mod.

david

2001 f250 4x4 cc sb , 6 in lift, cheyenne wheels, 3.73 gears, 4 in exhaust with muff delete ,piller gagues, dp 6 pos chip, zoodad ,john wood transmission
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post #5 of 99 (permalink) Old 08-17-2012, 11:50 AM
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If you have a GFS then you are 2 tanking.

In order to help you need to provide more info.

How do you process your oil? I know you said you centrifuge but do you heat the oil? If so how hot? How many passes? Do you check for water after processing? If so how? HPT?

How is your conversion set up? What micron rating is your VO filter? Are you sharing any of you stock fuel system components?

What is your VO operating temps?? You should be running at least 160F. If your not then that would definetly cause coked injectors. Do you purge before shutdown? If so how long & how long are you running the truck after purging before you shut it down.

The most common reason for coked injectors on WVO is low veg temps or improper purging.

2001 F-350 Nondually. 244K miles. Pretty much stock. DIY SVO Vegistroke style 2 tank conversion April 2010. 125K miles On Vegi!!Monitoring with Torque.
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post #6 of 99 (permalink) Old 08-17-2012, 12:08 PM Thread Starter
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No. I do not run WMO.
Yes. I do start and stop on D2 and have a 2-tank system.
I have already done the Harpoon and Hutch Mods.
I don't have re-built injectors.

1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
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post #7 of 99 (permalink) Old 08-17-2012, 12:16 PM Thread Starter
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Yes. I do heat the oil to 160 degrees. I run it for 3 hrs, 30 gallons at a time. I assume since it does 55 gph it is making quite a few passes.

No. I do not check for water after processing. I expected the heat from centrifuging to burn most of it off, as well as the water separators to collect it.

I have a 2 micron filter and the pump is shared for both D2 and WVO.

I do not know the oil before it hits the truck. I have a 201 or 210 degree thermostat and I wait for the engine to get to full operating temperature before I switch over.

Yes. I purge before shutdown. I switch as I'm getting off the highway and my truck runs for about 10 minutes and 2 miles up and down hills and in traffic. I can't say I'm always perfect though at purging.

1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
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post #8 of 99 (permalink) Old 08-17-2012, 01:51 PM
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Could you describe your conversion setup in more detail? What components you have & how it is plumbed? Are you sharing anything else other then the pump?

You should check your oil for water. Just because your heating the oil doesn't mean your getting all the water out. Every batch is different as well. One batch may dewater fine & the next may not.

I would also suggest that you get some gauges. You should really have a VO temp gauge & a fuel pressure gauge. Your conversion may not be providing enough heat to get the oil to operating temp.

How many miles did you get before you started having problems again?? How many miles is on the injectors??

What is the Harpoon mod??

2001 F-350 Nondually. 244K miles. Pretty much stock. DIY SVO Vegistroke style 2 tank conversion April 2010. 125K miles On Vegi!!Monitoring with Torque.
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post #9 of 99 (permalink) Old 08-18-2012, 02:23 PM
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Marcus34-when you say I have a 201 or 210 degree thermostat
is this is fuel temp,you need to masure fuel temp before go to IP.

I`ll improve English
Fiat 2500 NA IDI VE pump,meh LP,2T,CF,diy WI,FPHE etc.WMO up to 90%,no WVO
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post #10 of 99 (permalink) Old 08-18-2012, 05:16 PM
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Quote:
Originally Posted by mtrans View Post
Marcus34-when you say I have a 201 or 210 degree thermostat
is this is fuel temp,you need to masure fuel temp before go to IP.
It's actually a 203 degree & that is the engine t-stat.

2001 F-350 Nondually. 244K miles. Pretty much stock. DIY SVO Vegistroke style 2 tank conversion April 2010. 125K miles On Vegi!!Monitoring with Torque.
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post #11 of 99 (permalink) Old 08-19-2012, 03:02 PM
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if you really want to know fuel temp only way is PTC or NTC senzor-meter.

I`ll improve English
Fiat 2500 NA IDI VE pump,meh LP,2T,CF,diy WI,FPHE etc.WMO up to 90%,no WVO
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post #12 of 99 (permalink) Old 08-21-2012, 08:04 AM Thread Starter
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What is that senszo-meter?

I was told that these electrical injectors can't handle veggie oil? Is this true as I've never heard it before.

1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)
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post #13 of 99 (permalink) Old 08-21-2012, 09:25 AM
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[QUOTE=Marcus34;2219944]What is that senszo-meter?

I was told that these electrical injectors can't handle veggie oil? Is this true as I've never heard it before.[/QUOTE

There are many guys that run hundreds of thousand of trouble free miles running a 2 tank conversion. Most people that do have problems are either not dewatering their oil well enough, not running the oil hot enough or at the right pressure, or not purging long enough.

The injectors will handle vegi just fine.

2001 F-350 Nondually. 244K miles. Pretty much stock. DIY SVO Vegistroke style 2 tank conversion April 2010. 125K miles On Vegi!!Monitoring with Torque.
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post #14 of 99 (permalink) Old 08-21-2012, 02:25 PM
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PTC or NTC senzor-meter
is for precise measure temp or IN/OFF something,bi-metal is not precise,I took about temp only.

I`ll improve English
Fiat 2500 NA IDI VE pump,meh LP,2T,CF,diy WI,FPHE etc.WMO up to 90%,no WVO
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post #15 of 99 (permalink) Old 08-22-2012, 01:39 PM Thread Starter
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Simone-

I have a 60 gallon trekker tank in the back which has heated coolant running through it w/ a 203 degree thermostat from the engine.

I also have an 87 watt heater wrap around the oil filter and that is wrapped in insulation as well.

The fuel line down to the valve switch is insulated too.

What else would you suggest for heating purposes?

Where would I want to put a thermostat? Up near the engine bay?

1999 F-350 Dually Diesel 7.3L DI, 201*, Harpoon & Hutch Mod
Akron, OH (45 min South of Cleveland)

Last edited by Marcus34; 08-22-2012 at 02:21 PM.
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