E-fuel issues
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Junior User
Joined: Mar 2018
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E-fuel issues
Ok so I got my home brew e-fuel conversion complete today. Cranked it up and adjusted the regulator to 70psi at idle. Runs great, no issues at all while idling. Take it out for a spin and it's a dog. No power and wants to stall when I stop. I have no way of knowing what the pressure is while driving. No leaks. I'm at a loss as to what the problem is. Anybody got any ideas?
Lead Driver
Joined: Apr 2016
Posts: 7,211
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From: Bahstun
What fuel pressure do you have when just key on and when at idle?
What temp was it last night?
You could have air in the lines and can take a good run to purge it out.
get a 100 PSI gauge and a long grease gun hose to extend it out of the hood to take on a test run
What temp was it last night?
You could have air in the lines and can take a good run to purge it out.
get a 100 PSI gauge and a long grease gun hose to extend it out of the hood to take on a test run
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
How is the home-brew system plumbed in? How are the pumps powered ON? Almost sounds like when going down the road the pumps are loosing power. Are you using an oil pressure switch to keep the pumps running? On two systems I've installed (single pump) I just jumpered the pump plus terminal to battery positive and you could hear the pump running, air purging thru the lines and it took maybe 10-15 seconds total.
I know, a lot of questions, sorry but knowing how it's plumbed in might help visualize possible problems.
I know, a lot of questions, sorry but knowing how it's plumbed in might help visualize possible problems.
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Junior User
Joined: Mar 2018
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How is the home-brew system plumbed in? How are the pumps powered ON? Almost sounds like when going down the road the pumps are loosing power. Are you using an oil pressure switch to keep the pumps running? On two systems I've installed (single pump) I just jumpered the pump plus terminal to battery positive and you could hear the pump running, air purging thru the lines and it took maybe 10-15 seconds total.
I know, a lot of questions, sorry but knowing how it's plumbed in might help visualize possible problems.
I know, a lot of questions, sorry but knowing how it's plumbed in might help visualize possible problems.
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Postmaster
Joined: Sep 2007
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From: Medford Oregon
OK, I've never heard where the pumps and filters are located before the tank switching valves, if I'm understanding you correctly. If so why would you do that and how do you control each pump OFF - ON when switching tanks? I was more concerned on plumbing up at engine area but now more confused than ever. I'm sure it's just me but some clarification would help.
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Junior User
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OK, I've never heard where the pumps and filters are located before the tank switching valves, if I'm understanding you correctly. If so why would you do that and how do you control each pump OFF - ON when switching tanks? I was more concerned on plumbing up at engine area but now more confused than ever. I'm sure it's just me but some clarification would help.
Postmaster
Joined: Sep 2007
Posts: 4,195
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From: Medford Oregon
I think the feed line from the switching valve to the pumps needs to be a larger diameter. I know on mine the instructions indicated with dual pumps this is recommended. Something to do with pump cavitation. The feed diameter (ID) hose is not large enough to feed both pumps and fuel starvation can occur.. .
At least that is what I've read but never experienced it as only used single pumps.
At least that is what I've read but never experienced it as only used single pumps.
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Junior User
Joined: Mar 2018
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I think the feed line from the switching valve to the pumps needs to be a larger diameter. I know on mine the instructions indicated with dual pumps this is recommended. Something to do with pump cavitation. The feed diameter (ID) hose is not large enough to feed both pumps and fuel starvation can occur.. .
At least that is what I've read but never experienced it as only used single pumps.
At least that is what I've read but never experienced it as only used single pumps.
Logistics Pro
Joined: Mar 2007
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From: knoxville, tn
Unplug one of the pumps and see if it makes any difference. If cavetation is the problem, eliminating one of the pumps should resolve that part of it. You will need to rig up something to monitor fuel pressure to aid in troubleshooting if that doesn’t fix your issue.
Postmaster
Joined: Sep 2007
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From: Medford Oregon
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Junior User
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