[Mgs] Intermittent fuel problem- 1974 MGB

PaulHunt73 paulhunt73 at virginmedia.com
Fri Jul 20 01:58:21 MDT 2018


Everything you describe is simply crap in the lines preventing the float valves from closing properly. If you have visible bits, then they will cause a problem.  Certainly not vapour lock, which as I understand it is effectively a blockage, and can't happen with our SU pumps and cars anyway.

What hose did you use?  There is some multi-layer so-called ethanol-proof stuff around that has a very thin inner layer, and unless it is a loose fit sliding onto the various ports that inner layer can shred, as here http://www.mgb-stuff.org.uk/fhose.htm

It could also be rubbish in the new tank, although if the pickup has the sock filter at the bottom as it ought to that shouldn't get into the lines.

What fuel are you using?  If it is high in ethanol then that could be a contributory factor in rubber decomposition.

PaulH.


  ----- Original Message ----- 


  After doing all this at first, I had to take the carb float bowls apart as the grosse jets had become clogged. Got that rectified and everything seemed ok at first, but then after some driving, the car started running like it was getting fuel starved, and I noticed what looked like some black chips in the fuel filter. I unhooked all the rubber fuel lines and and pump, and then blew compressed air through the line back to the pump. All seemed well for a short amount of driving, but then it bogged down again, got flooded when I tried to start it, and fuel ran out the ARV.
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