16vzetec

I cant get my fuel pump to work. its a wiring problem coz i modded the loom but where is the fuel pump relay and what colour is it? The loom is xr3i efi loom if that makes any difference?

mgtkr1

its purple ande located behind dash, drivers side. dont waste your time with a 2nd hand relay, at £50 nearly they arent cheap but should see you right for another 20yrs. just check through the wiring and the pump is in good fettle. bad wiring draws to much current and will overheat the relay. look for signs of heat.

orion_crazy_carl

iTrader: (3)

I know the MFI is a purple one drivers side, but wasnt to sure the EFIs one were too?

haz87

efi arent the purple ones like mfi. Dont know what colour they are tbh

martysmartie

iTrader: (1)

EFI will be yellow and a conventional 'SPST' relay, this differs to the MFI "Timer relay" hence why it's so expensive.

Martin

mgtkr1

missed the efi part.

16vzetec

ive chopped half the loom out and made my own dash and switch setup but ive been doing it on and off for months and ive forgotten where i was with it.
im guessing ive just got to power up the relay or earth it but the relay was working fine. ill get on the case tonight

haz87

Take it you've powered the pump directly to check pumps ok Mike?
(Btw the cvh is dead, dropped a valve head - just finished fitting a ZVH into the car. Think you and i need to go back to pod in the near future )

16vzetec

got pump working but not prime. just run all the time. not sure whats going on with it. its doing my head in. What controlls the priming? Haz shame about cvh. Still think you should get 16v in there! pod will be coming up when the cars done. petes turboed his fiesta so he now the one to beat

orion_crazy_carl

iTrader: (3)

ecu controls the priming, its a negative trigger relay, unlike the MFI that has a timer to prime, the efi doesnt,

16vzetec

I connected it directly to the pin on ecu and its still priming all the time

martysmartie

iTrader: (1)

Then the ECU for some reason must be keeping it on (I assume you do have it connected to the correct pin?)

Martin

orion_crazy_carl

iTrader: (3)

u wired it to the relay right??

16vzetec

yes, ive now cured one problem and got myself a brand new problem! lol
typical with my car as its the worlds unluckiest car, nothing ever goes right with it.
the problem with the fuel pump relay was a break in the wire inbetween the bulkhead and the cabin, christ knows why! but ive bypassed that and its fine.
my new problem is now ive lost a spark for no apparent reason considering it started two days ago.
the ecu is powered/ earthed and ignition powered fine, and the coil trigger wires seem to be working fine, coil is powered, engine earthed ok so christ knows whats going on.
oh the joys of modding cars lol