no fuel to motor

[Reaper8]

Wife's car died on her today so went and towed it home and have spent the day on it to no avail. first i checked the spark and was all good there so grabbed the trusty tin of "start you bastard" and after a little spray off she went then died again. so must be fuel. noticed the pump hum to life for about 5sec when turn the key on then go's quiet ripped so out with the regulator and turned the key on. no fuel came out took the filter off and again turned the key again no fuel. The fuel pump should come on untill it builds up pressure in the line and then stop, so if i have the filter off shouldnt it flow out?? I thought there might be a blockage in there somewhere so blew the lines (both flow and return) with air. got the test light out and looked at the pump wireing. when you turn the key on the plug gets power for abou 3-5 sec only then stops. any ideas as to why (as i would think it should really have constant power at the plug without the pump hooked up) or where to look now. I have changed the pump relay under the bonnet near the battery aswell. im out of idea's and need the wisdom that is always available on this site

[falconhell74]

sounds like your pump is knackered mate, if you have power to the pump but no fuel comes out when you turn the key . not shure but I think there might be a fuel pump fuse, 2 diffrent power circuits, 1 to prime the pump before cranking & 1 to supply constant power after start.

[atec77]

Originally Posted by Reaper8

Wife's car died on her today so went and towed it home and have spent the day on it to no avail. first i checked the spark and was all good there so grabbed the trusty tin of "start you bastard" and after a little spray off she went then died again. so must be fuel. noticed the pump hum to life for about 5sec when turn the key on then go's quiet ripped so out with the regulator and turned the key on. no fuel came out took the filter off and again turned the key again no fuel. The fuel pump should come on untill it builds up pressure in the line and then stop, so if i have the filter off shouldnt it flow out?? I thought there might be a blockage in there somewhere so blew the lines (both flow and return) with air. got the test light out and looked at the pump wireing. when you turn the key on the plug gets power for abou 3-5 sec only then stops. any ideas as to why (as i would think it should really have constant power at the plug without the pump hooked up) or where to look now. I have changed the pump relay under the bonnet near the battery aswell. im out of idea's and need the wisdom that is always available on this site

when you turn the key it primes for around 4 seconds , then the pump stops and restarts when the car cranks/ starts , have someone try and listen you should hear it spin up again when cranking you may have low pressure so clamp the return line and see if that gets a start , the pressure metering valve on the injector return rail may have failed

[Reaper8]

thanks guys, so if there is no power at the plug during cranking it be electrical, if power to pump but no noise it be pump. the wife said it just die'd no jerkin nothin just went dead, said she didnt even realise till saw all the dash lights on

[mongrelEF]

Probably the pump. If it's priming for 3-5 sec, that's normal and will start the car at least. If you have the line open during prime, you can hear the pump, and nothing comes out - the pump's rooted. Probably stripped impellers; they're only plastic and the crap that builds up in the tank over time can seize them. Especially if it's run out of fuel or been over rough ground recently.

[Reaper8]

Thanks for the help guys, went down and got a new pump and off she went.