xj8 driving 50 ish in traffic, hit the motorway and tried to accelerate. engine died, immediate thought was fuel pump/relay. got recovered changed pump still will not start???????????
no codes showing
turns over fine

 

Do you have fuel pressure at the schrader valve on the fuel rail? Knowing the year and number of miles may help.

 

no fuel pressure, power to pump though
noticed throttle body buzzing?
another thread mentions TBs causing this problem

 

A TB fault should always post a fault - I had a no start recently, signal to fuel pumps good, spun over, no fuel pressure - thought pumps but it turned out to be the engine coolant temp sensor. This doesn't give a code so look at this part before the TB.

 

Thanks

Sean

just ordered another sensor

i hope it works

 

Dumb question but did you check the fuel filter to make sure it's not plugged up? Usually if you're able to cruise at low speed/low fuel consumption you can get by until it's fully clogged, then no fuel to start afterward.