Point me in the right direction.

 

 

Car appears to pull okay but at 4500 rpm just stops pulling and I get the pop of fuel detonating in the exhaust. I do have a blitz boost controller so tend to keep fuelled with the Tesco 99 as that's the best a man can get round these parts.

 

Any idea what may be causing this problem.

 

If its any help I recently had an issue with a leaky oil pipe around the rear diff cooler which has been replace not sure if this has any bearing on.possibly a sensor issue ?

 

Help appreciated

theres a fair whining noise coming from the back, very audible inside the car. so my guess is the fuel pump is on its way out hence the lack of power and stuttering

you could be right.... check the connections to it, easy to get to in the spare wheel well, just undo the round plate....

 

a fuel pressure check would be a good test and also if you could do it when in motion...

there are a few issues that can happen around the fuel system.

leaks

bad fuel ecu

bad pressure regulators

and of course the pump

 

you could also be in safety boost, check for error codes...

 

I'm sure there are a few pumps available on here (I have a spare working one) but check if that is the problem first.

 

the other option is a new after market one but make sure you get the right one as the 300 has a pretty gone one to start with.

 

if you want (and you're prepared to pay for postage) I can send you my spare one to test, if it fixes the problem you can pay me for it other wise send it back to me.