Fuel pump not working - relay was faulty
Discussion
For info, these occasionally fail. Mine just did with no warning, causing engine not to run and some grumpiness 
Liam at local Shrewsbury garage Shropshire Automotive Services figured it out quickly after popping the cover off the relay (he owns a Chimaera, and they often host dyno runs for the TVR regions). The brown fuel pump relay is slightly unusual in having two contacts, and we could see that one of them clearly wasn't making contact when you flexed the metal strip they were both on.
I'd already spent a bit too much time checking the pump fuse, checking the pump's earths (on the driver's B-pillar) and the bigger jobs of the multi-pin connectors under the airbox and then opening up the flap above the tank under the offside boot carpet... the pump was receiving 4.8V with the ignition on which is normal, but the pump wouldn't run. I found later that a properly working relay supplies extra current just for few secs to pump to prime system when you turn ignition on.
As I hadn't got a spare relay of this type I checked that was REALLY where the fault was with a little bypass cable to the three centre contacts (see pic) and it started and ran perfectly, so I then decided to just bend the errant contact a bit closer, popped the relay cover back on and it has run fine so far on that original relay.
So if your pump isn't whining for a few secs before you start it, I recommend the easier route of checking or replacing the relay!
Liam at local Shrewsbury garage Shropshire Automotive Services figured it out quickly after popping the cover off the relay (he owns a Chimaera, and they often host dyno runs for the TVR regions). The brown fuel pump relay is slightly unusual in having two contacts, and we could see that one of them clearly wasn't making contact when you flexed the metal strip they were both on.
I'd already spent a bit too much time checking the pump fuse, checking the pump's earths (on the driver's B-pillar) and the bigger jobs of the multi-pin connectors under the airbox and then opening up the flap above the tank under the offside boot carpet... the pump was receiving 4.8V with the ignition on which is normal, but the pump wouldn't run. I found later that a properly working relay supplies extra current just for few secs to pump to prime system when you turn ignition on.
As I hadn't got a spare relay of this type I checked that was REALLY where the fault was with a little bypass cable to the three centre contacts (see pic) and it started and ran perfectly, so I then decided to just bend the errant contact a bit closer, popped the relay cover back on and it has run fine so far on that original relay.
So if your pump isn't whining for a few secs before you start it, I recommend the easier route of checking or replacing the relay!
Edited by tail slide on Friday 30th August 21:33
Gassing Station | Tamora, T350 & Sagaris | Top of Page | What's New | My Stuff