Evening,
I Recently bought a Mk2 polo that had been sat for a good few years. It took a bit to get it running, namely cleaning out the inlet fitting of the carb, which was completely solid with dirt.
Following this, I emptied the tank, remove the fuel gauge sender and used the hole to wipe out the bottom of the tank. It wasn't ridiculously dirt but there was some grit in there. I replaced the rubber hoses in the engine bay and added two inline filters, one before the mechanical pump and one after.
The car ran fine, but after a few miles it would cut out. The pre-pump filter that i had installed had gained a lot of dirt, and replacing the filter solved the problem. It did it again today, and upon swapping the filter, fuel shot out of the supply hose very quickly.
Removing the fuel cap gave a HUGE hiss, and suddenly the fuel stopped pouring out of the fuel supply hose in the engine bay. I had thought that replacing the filter was solving the issue, but it would seem that perhaps just the action of removing and replacing the filter was releasing Vacuum, allowing the car to run again for a few miles.
What would be causing this? And would this be the cause of the fuel starvation? At first I thought that surely the fuel shooting out of the supply hose couldn't possibly allow fuel starvation, but I suppose the fuel could be running back down the return line so quickly that it's drawing it back out of the float bowl on it's way back?
Any help would be great.
Thanks
I Recently bought a Mk2 polo that had been sat for a good few years. It took a bit to get it running, namely cleaning out the inlet fitting of the carb, which was completely solid with dirt.
Following this, I emptied the tank, remove the fuel gauge sender and used the hole to wipe out the bottom of the tank. It wasn't ridiculously dirt but there was some grit in there. I replaced the rubber hoses in the engine bay and added two inline filters, one before the mechanical pump and one after.
The car ran fine, but after a few miles it would cut out. The pre-pump filter that i had installed had gained a lot of dirt, and replacing the filter solved the problem. It did it again today, and upon swapping the filter, fuel shot out of the supply hose very quickly.
Removing the fuel cap gave a HUGE hiss, and suddenly the fuel stopped pouring out of the fuel supply hose in the engine bay. I had thought that replacing the filter was solving the issue, but it would seem that perhaps just the action of removing and replacing the filter was releasing Vacuum, allowing the car to run again for a few miles.
What would be causing this? And would this be the cause of the fuel starvation? At first I thought that surely the fuel shooting out of the supply hose couldn't possibly allow fuel starvation, but I suppose the fuel could be running back down the return line so quickly that it's drawing it back out of the float bowl on it's way back?
Any help would be great.
Thanks
