Vehicle & Technical > Range Rover

Another RRC not firing (fuel problem)

(1/3) > >>

paulmmc:
Hi,
I've just replaced my 3.5 V8 onto a new chassis and did the basic wiring to get the engine running, it is turning, the fuel pump is pumping and there is a spark at the plugs but not firing at all.
I am learning as I go so really don't know what else to check, at the moment no fuel is coming back through the fuel return pipes, but when i disconnect the fuel feed line it is spraying petrol, so looks like fuel flow is stopping when it reached the engine. What could this be?
Any suggestions welcomed.

I have said all along I'll do whatever i can myself but if i need to call in the experts then so be it. Does anyone know of a good mobile mechanic who would work in the Enfield Area (north London)? But obviously i would rather sort it myself for monetary reasons but also I want to know how to do it.

Cheers, Paul

bogie:
By the sound ,its an efi which means something electrical on the efi is not connected or blowen,so stopping the fuel from entering the system and returning!

Rossko:
Are you convinced you have the fuel flow and return pipes the right way around?

The easy wire to leave off is the EFI rpm sensing wire to coil -ve, it won't fire without that.

clbarclay:
Have you checked that fuel isn't entering the cylinders?
Easiest check of this is unburnt fuel (white mist) coming out the exhaust when crancked.

Assuming the pipes are plumbed the right way round, the fuel pump supplies fuel direct to a common rail feeding all 9 injectors. A fuel pressure regulator is on the end of the fuel rail and if pressure in the fuel rail rises too high (pump supplying more fuel that the injectors are using) then the excess is returned to the tank.

If the pump is working properly then the fuel must be going somewhere.


Also are you certain the pump is getting fuel?
I've had quite a bit of fun :evil: recently with crud in a fuel tank getting disturbed and blocking a fuel system.

paulmmc:
I double checked today and the fuel pipes are definately the right way round, i disconnected the supply pipe just before it connects to the engine and fuel was spraying out while the ignition was cranking so i am happy the pump at least is working. Is it possible for a fuel blockage to occur somehwere in the fuel rail and if so what is the best way of checking and curing it?
Just to convince myself i had wired it up properly i sprayed some of that 'Easy Start' aerosol into the air inlet while cranking the engine and it did fire briefly, so it is definately a fuel problem.
As far as i can tell everyhting running from the ECU is hooked up to where it should be (or at least where i think it should be).

Any more tips greatly appreciated.

Cheers, Paul

Navigation

[0] Message Index

[#] Next page