fuel pump??

[stickupkid11]

hi everyone and merry xmas to you all, i have a problem with my fuel pump, it doesnt seem to be working. what should i do 1st change the pump or the relay?? thanx

[maxfield]

I'd go with the relay first...

[Ant]

check the fuse, then the relay 1st.

pumps are very robust and dont normally fail without warning.

easy test, lift the rear seat base out, then check for power @ the fuel pump with the engine cranking.

use a test lamp/bulb for best results

Brian Moooooooooooooooorrrrrrrrrrrrreeeeeeeeeeeee

[stickupkid11]

thank you where will the relay be??

[Ant]

M40/42 under a plastic cover @ base of screen on passenger side( engine bay)

M20 is passenger inner wing

FP relay is 4 pin, DME has 5

[stickupkid11]

thank you i know what i will be doing xmas day! have yourselfs a good one

[Brianmoooore]

Second time in five minutes I've typed this!
When you find the orange fuel pump relay, pull it out, and use a short piece of wire to link together pins 30 and 87 of its base. This will (should) make the fuel pump run continuously, and enable you to check it out.
Remember where the relay came out from, as there's usualy a spare, unused socket nearby.

[stickupkid11]

wich relay is for the pump? i had a blown fuse is it poss the relay could have taken the fuse with it???

[Brianmoooore]

When you find the orange fuel pump relay,

Next to the ECU (DME) relay.
Unlikely that a faulty relay could blow the pump fuse, but not totaly impossible.

[stickupkid11]

i dont have an orange relay, i have 4 blue and 2 black, would the relay be the same as a b9 alpina relay?? thanx

[Brianmoooore]

, i have 4 blue and 2 black,

???!! Where have you found these relays? And you still haven't told us what car?

[stickupkid11]

its a320i with the m20, fusebox just under windscreen,thanx

[Brianmoooore]

The relays relevant to this discussion are NOT in the fusebox!!
They are under a plastic cover right beside the air filter/AFM, on the LH inner wing.

[stickupkid11]

ah! thank you i will have a look today. do you know if the relay will be the same on a B9 alpina??

[stickupkid11]

does any one know what sort of voltage i should be getting to th pump? im getting around 7 volts so i thought it was the pump £110 later and it still doesnt work.

[Brianmoooore]

Pump should have around 12 volts across it when it's running. If you're only getting 7, then either it's drawing a LOT of current, or there's resistance somewhere in its supply.
Fuel pump relay is just an ordinary 4 terminal one. Same as the orange relays in the fusebox.