Clicking fuel pump relay

[Akane]

So, everything seems to run A LOT smoother now, changed injector lag times (woops, forgotten about that), but now the fuel pump relay on my SW20 is going mad?

I have a Walbro 255lph in there, did not do any other resistor / pump modifications.

http://www.youtube.com/watch?v=WU_unpZmAT4

The vid explains itself pretty much, any ideas would be appreciated

update:

Trying to do some self help here, pulled the relay off and looked up the BGB, but it's not clear which pin is which.

http://www.mr2-tech.com/bgb/mechanical/ ... tem/24.htm

[79rolla]

would seen you have a dodgy earth somewhere? dirty terminals or something shorting out? check the remote wire with a test lite to see if its flashing ect

process of elimination.. try a different relay aswell

[Akane]

There's a central earthing point for a lot of relays (like 5+ wires bunched up to a metal ring), didn't have that on before and car wouldn't start, now it's starting fine so I don't think it's a bad contact for relay earth, but it could be a short in the wire. Most probably is the relay itself that lost it's marbles, my P/S relay is perma dead right now.

I'll try another relay first but before I do I wanna run some diagnostics on this one, which I can't with that online BGB not showing which pin's which.

Is it common for relays to fail like this? Random clicking. Or has my whinebro pump killed it?

Edit: found the same relay page on my paperback BGB, I did step one on checking continuity and it's fine. Don't have the right tools for step two (need clips and power source).

Next is checking resistor pack tomorrow.

[XS1V]

Hmm it sounds and looks to me like its loosing the feed from the ECU or dropping earth or power to it, good fun

Brad

[Akane]

What I understand from the diagram is, the relay can only be 1 of the any 2 state, high or low mode, even if it loses power it'll be stuck on high mode? Which shouldn't affect the idle at that noticeably.

I think you'll have one in your car as well. Did you bypass it?