Intermittent non-start.

**Wasp** · Thursday 28th January 2016, 16:25

Hi everyone. Since owning my T5 (bought in 2008) there has been a rare but annoying fault whereby the car will turn over and momentarily fire or fire and rev up once then cut out again. This was overcome by removing the key,locking then unlocking the doors with the fob and then it would start. Recently (in time with the weather taking a turn for the worse) this has become more of a problem and isn't overcome first attempt by the aforementioned. This applies to both my keys/fobs. Once started it is absolutely fine and has never cut out or misbehaved in any way. Any advice would be very much appreciated.

**M-R-P** · Thursday 28th January 2016, 16:29

Might be an idea to have it plugged into the proper diagnostic and see what it throws up.
With electrical stuff on these cars, guessing is usually fruitless.

**Shadow** · Saturday 6th February 2016, 20:18

Ive had the same problem before. Would start and run for a second or two then die (mostly at the petrol station) it gradualy got more and more often then started to cutout while driving. I found the problem to be the fuel pump relay it had dry solder joints whitch i resoldered and its been fine for the last six months. the starting and cutting out is because the fuel pump will prime the fuel system and the car will start but the pump wouldent run continuasly once the engine was running and it would lose fuel pressure and stall.

**Wasp** · Thursday 18th February 2016, 09:26

A replacement crank position sensor appears to have resolved this... £21 from fleabay and literally 10 minutes to fit. Thanks for your replies.

**Mark F** · Thursday 18th February 2016, 09:55

Mine has done similar to Shadow's car. Would struggle to start when warm (filling station often), just cranking and not catching. Then every now and then it would just randomly cut-out whilst driving, as if I'd keyed off. The fuel pump relay was replaced, and it's fixed both issues.

Originally Posted by Shadow

Ive had the same problem before. Would start and run for a second or two then die (mostly at the petrol station) it gradualy got more and more often then started to cutout while driving. I found the problem to be the fuel pump relay it had dry solder joints whitch i resoldered and its been fine for the last six months. the starting and cutting out is because the fuel pump will prime the fuel system and the car will start but the pump wouldent run continuasly once the engine was running and it would lose fuel pressure and stall.