Hi

I have a periodic problem with my '93 saph Cos 4x4.
Sometimes the fuelpump doesn't run when I try to start the car. It happens something like 2 times during a week.
I have changed the pump, as I thought the old pump had let go.
then it was working for a while and then started to cut out again.
Then I checked the wiring and at last I checked the relays. I have changed two relays connected to the fuelpump and the problem still occurs about twice each week.
And it seems to get more and more often.
Could it be an ECU-problem? I'm running a Stage 1 chip.
I'm now running with an extra wire in the boot, so I can connect the pump to the bootlight, so it can get some power to start the car.
When the car has been running for some time (varies alot!), I can unplug the wire and the car runs as normal.

Please help!

Thanks!

 

What kind of alarm do you have? some of the toad key fob imobilisers have the loop put round your steerinng colum, if the fob doesnt see the wire then it wont prime your pump, this is only a sugestion as it happened to me on my saph

 

Sounds kinda like the original wiring to the pump is getting old and crappy, maybe getting damp even, I've heard before that some people renew the wiring to the pump, not least because when the wiring starts to fail you can find yourself running lean... and we don't want that

 

Could also be the fuel cut switch in the spare wheel well