yogibear1969
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| posted on 14/1/16 at 11:51 AM |
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Fuel Problems
OK,
I have a problem with what I think is some contaminant in the fuel tank.
Despite new fuel lines, two filters ,y odel jets still clog up with a gel like substance.
I can only assume there's something in the tank; old french fuel?; that dissolves in the fule so gets past the filters then sticks to the idles
jets and eventually blocks one!
Redstar on the JPSC Forum suggests ethanol in petrol?
I have taken a few pics today with an endoscope but the results aren't great, I'll try and upload here and all advice welcome.
Now, is it possible to get the tank cleaned in situ? Or will I have to remove the tank from the car?
I am now thinking I need to remove tank and get ot steamed.
Edd
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40inches
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| posted on 14/1/16 at 12:39 PM |
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Possibly Silicon, that turns into a slimy gel when in contact with petrol?
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nick205
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| posted on 14/1/16 at 02:24 PM |
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Not sure what would cause that to happen!
On my Indy I used some black windscreen sealant to help bond the Sierra fuel level sender into my ally fuel tank. Small particles got into the fuel
and blocked the filter starving the engine of fuel. Removing the tank, emptying it and blasting the fuel line with compressed air resolved the
issue.
Removing the tank was hard work as I had to remove the rear panel to get access to the nuts and bolts!
ETA...I would also highlight that my fuel lines were Ø8mm copper pipe with rubber fuel hoses between the tank and fuel pump.
[Edited on 14/1/16 by nick205]
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hizzi
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| posted on 14/1/16 at 04:00 PM |
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fuel hose degrading?
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yogibear1969
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| posted on 14/1/16 at 05:56 PM |
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Replaced all the fuel hoses and filters last year but same problem. I am not aware of how silicon would get into fuel tank!
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40inches
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| posted on 14/1/16 at 06:55 PM |
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quote:
Originally posted by yogibear1969
Replaced all the fuel hoses and filters last year but same problem. I am not aware of how silicon would get into fuel tank!
Usually sealing the fuel level sender. However, if you are saying that the tank is heavily contaminated, Silicon is not likely a suspect.
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yogibear1969
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| posted on 14/1/16 at 07:02 PM |
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Wouldn't the silicon be caught by filters?
Whatever, I think the best solution is tank out!
Edd
quote:
Originally posted by 40inches
quote:
Originally posted by yogibear1969
Replaced all the fuel hoses and filters last year but same problem. I am not aware of how silicon would get into fuel tank!
Usually sealing the fuel level sender. However, if you are saying that the tank is heavily contaminated, Silicon is not likely a suspect.
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obfripper
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| posted on 14/1/16 at 07:05 PM |
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By the sound of it your fuel system has bacterial contamination.
It happens more often with modern fuels due to the higher bio content, and is more likely the less the car is used.
A fuel stabiliser additive may get the bacteria under control without having to remove the tank, Fuel Stabiliser Additive - Keep
Stored Petrol Fresh - Classic Car Motorbike
The jelly you've got in your fuel is detritus from the bacterial life cycle, similar to the jelly you get in your screenwash when it
doesn't get used.
Dave
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yogibear1969
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| posted on 14/1/16 at 10:22 PM |
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That sounds exactly like it, I did suspect so as the last few years apart from le Mans it hasn't gone very far so has had fuel sat in it for
many months as was never good at draining down as always hoped to go for a drive but life got in the way!
Do you think the stabiliser will sort the bacteria in there without removing tank?
I may remove tank anyway to be sure. I'll at least get some for future and in case tank is too hard to get out, don't think it should be
too bad just need that valuable commodity time!
Thanks
Edd
quote:
Originally posted by obfripper
By the sound of it your fuel system has bacterial contamination.
It happens more often with modern fuels due to the higher bio content, and is more likely the less the car is used.
A fuel stabiliser additive may get the bacteria under control without having to remove the tank, Fuel Stabiliser Additive - Keep
Stored Petrol Fresh - Classic Car Motorbike
The jelly you've got in your fuel is detritus from the bacterial life cycle, similar to the jelly you get in your screenwash when it
doesn't get used.
Dave
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obfripper
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| posted on 14/1/16 at 11:37 PM |
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I'm not too sure whether the bacterial residue will breakdown/dissolve with the fuel stabilizer, but it will inhibit any further growth by
allowing the condensation, bioethanol and petrol to mix as a solution so there is no interface for the bacteria to grow on.
It looks like Wynns do a biocide additive Link, its got some guidance on use and
claims to kill and prevent bacteria.
Dave
[Edited on 14/1/16 by obfripper]
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alfas
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| posted on 17/1/16 at 12:15 PM |
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its impossible to clean the tank properly insitu
i guess you still have the original steel bmc-mini-tank fitted?
this tank has not a bottom drainage plug.
so tank needs to come out, flushed with water, check for internal corrosion. in case of yes, you can "restore" the inner side of the
tank with a special paint. also preventative i would weld / braze a drainage plug on the bottom of the tank b4, also change the fuel sender and its
seal.
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steve m
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| posted on 17/1/16 at 01:16 PM |
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Personly i would not wash the tank out with water, but use thinners or white spirit
water will increase the tank to rust if its steel, no matter how you dry it
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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alfas
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| posted on 17/1/16 at 01:32 PM |
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you need to wash it with high pressure, to get all the gunk out ...than you use such a rust converter
http://www.rostio.de/shop/rostio-tankentroster-1-liter-tankentrostung-konzentrat
http://www.rostio.de/shop/en/
this concentrate need to be mixed with water, by the way.
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