dieseldragon 0 Posted April 14, 2010 Report Share Posted April 14, 2010 Have had terrible probs with my car running bad. After much head scratching the problem was traced to faulty fuel pump. It literally fell apart when we took it out.Now new pump is in but will not run. Relay triggers for a split second then goes off. We have taken the relay out and tested the connections at the fuel pump. Pump receives voltage for a split second.Any one got any suggestions what to look at next? Link to post Share on other sites
legvw 0 Posted April 14, 2010 Report Share Posted April 14, 2010 Have you tested the relay? Link to post Share on other sites
dieseldragon 0 Posted April 14, 2010 Author Report Share Posted April 14, 2010 Yes taken relay out and tested it. The relay receives power for a split second when the ignition is turned on, then nothing. So I think that the problem is further up the line than the relay. Is the relay switched by the ECU? Link to post Share on other sites
legvw 0 Posted April 14, 2010 Report Share Posted April 14, 2010 Yes its switched by the ecu, but the power to the pump comes from th relay in the fuse box.Is yours odb1 or 2? Might be an idea to try it on vag com. Link to post Share on other sites
dieseldragon 0 Posted April 15, 2010 Author Report Share Posted April 15, 2010 An update. After a world of tests, removing the pump 3 times, consuming 20 tins of beer and a lot of swearing the fault was traced to a kinked fuel pipe between the pump and the lid. The rubber pipe was fine when the pump was out of the tank, but once the lid was put on the pipe kinked. It seems that the pipe had gone really soft and had a crease in it, probably with age and being submersed in petrol most its life.The reason pump only ran for a split second was that it was only pressurizing 4" of tube, then cutting out.I am no novice with cars, but this one had me convinced it was an electrical fault. Thanks for the replies Link to post Share on other sites
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