ive just got my engine conversion to the point where it is ready to fire but it wont lol.
its an efi cvh turbo engine running ofab management and cossie fuel pump. it looks like there is no fuel getting injected into the bores. theres fuel at the rail and the injectors are pulsing. could it be that the fuel is constantly getting returned? has anyone experienced this problem before?

Grant

 

is it sparking correctly??

 

as in 1-3-4-2 ?

 

yeah mate its sparking correctly. the spark is fine, the prob is theres no fuel being injected into the cylinders??

Grant

 

Just a thought.

Have you checked how much pressure you have in the fuel rail?

You may have fuel there but not enough pressure.

Just seems strange that you have fuel physically there and a injector pulse but still nothing to the cylinders.

 

ive not checked what pressure is there as i dont know what it should be mate. ive realised that the vaccum hose from the inlet that connects onto the nipple in the fpr hasnt been fitted. would this prevent it from gettint fuel into the bores? i was reading that the fpr works out the pd from the pressure in the rail and the vaccum from the inlet to regulate the fuel but with the inlet vaccum disconnected would it be fully open and constantly return to the tank?
Does anyone know what pressure should be at the rail? Ive also got the fuel pump relay wired up to a perm ign feed for just now so it dosnt prime the fuel it constantly pumps fuel while the ign is on but i dont think this will matter will it?

Grant

 

Not 100% sure what the pressure should be but it should run with the vac pipe disconnected.

Shouldnt matter about the relay for the minute but I would wire it up correctly once you've found the fault.

 

what car are you converting into? How do you know the injectors are firing?

 

its into a mk2 xr2 mate, ive removed the injector plugs ang tested the pulses with an l.e.d it still dosnt tell me if the injectors are firing tho.

grant

 

Have you got the main fuel and return lines the right way round

 

yeah mate defo the correct way round. gonna have a look at the wiring again and check the fuel pressure.

grant