Hi I have a TVR S1 with a cosy BOA 24v. I completed the build in May and took it to Spa that month - 1000 untroubled miles. Done another 500 miles without problems until last month. I drove 100 miles to Chesterfield when it just cut out when pulling away from standstill in traffic at a junction. Wouldn't restart. I couldn't hear the fuel pump prime. (fuel pump bought new a couple of years ago for the build). The breakdown chap crawled under the car and checked that the pump had 12v which it did. He tapped it a few times and it sprung into life. I drove for another 10 miles and it died again. I tapped the pump several times and it started after a number of attempts then drove fine for 150 miles home. I then fitted a new Sytec filter and a new fuel pump. Started fine and ran for 3 miles only to die again, basically sometimes it will start and idle but will not pull away. Some times it runs for 200 metres. The tank was checked and found clean during the build, has new pipes throughout and the injectors sent away for o/h and spray pattern check. The only part still original (1990) is the fuel pressure regulator. Is it worth getting an adjustable one with gauge? What pressure should it be adjusted to?

 

Are you sure it's the pump and not the wiring to it?

Also check the cps at the front of the engine

Non starting is almost always down to that