I am the proud new owner of a 2003 Discovery HSE7. While driving, it will sputter then shut down, and usually restart. Today, I had the crankshaft position sensor replaced and while on the way home, it started doing the same thing, bit would not refire and stay running. When I lift the hood, I hear a buzzing sound coming from the main relay (R9). I pull the relay out and put back in and presto, it starts and runs.
What could be causing this? Cam sensor? Bad relay?

 

Maybe relay. The ECU grounds it to activate. Bad connection at ECU?

 

I vote for bad relay. Should be another one you can swap around.

 

Well, this has been a process.
1. Replaced the Cam Sensor - still had the issue
2. Replaced the relay - still had the issue.
3. Replacing the fuse panel under the hood, looked as if a small fire happened under the panel shorting out the main relay.

Will update when complete.

 

Ended up being a short under the fuse box causing all of the problem.

I hope I can enjoy my Disco HSE7 now.