Fuel pump problem

[Kas]

I noticed a problem with my fuel pump.

Sometimes, when I try to drift, od just drive normaly, the engine suddenly stop.
When I try to run it, every thing looks ok, but I don't hear fuel pump, and dont hear fuel pump relay on passenger side.
I think that fuel pump is OK, but I may have problem with relay or something.

When I wait for some 1 minute, the car runs normaly.

I looked in manual, and find that fuel pump works thru the circut opening relay.
Also, I noticed fuel pump check conector.
What is purpose od that conector?

Did some one have simillar problem?
How did he resolve problem?

[banpei]

Lots of members had problems with their fuelpumps. Don't know exactly who had what problem, but I'd recon it's a combination of a few things: losing fuelpressure when drifting sounds like a different problem than regular driving. Could be the same source: bad functioning pump.
Ivan141 just replaced his pump, perhaps he can tell you more about the connectors.

[Kas]

I think that problem is something electric becouse as I said, when I try to start for a second or less, if everythig is OK, I hear after 2-3 sec click near co-driver legs and a sound of fuel pump from fank ( very quiet )

But, when engine suddenly stop, and I try same thing for a second or less, I don't hear fuel pump od relay near co-driver legs.

The car is reving, but won't start.

Becouse of that I think that there is problem with wires or something similar.

Thanks, Kas

[Ivan141]

I think it was Ian that had this same problem, but only while drifting.
Take a look at the circuit opening relay and make sure it's firmly connected. I have also heard of these relays going bad causing problems like this...but it's more likely just a loose connection.
If you keep having this problem after you've made sure that the relay is plugged in properly then you could try changing the relay, or perhaps temporarily apply a direct 12v source to the fuelpump (use a good size wire for that though) to see if that makes a difference.

I'll try to give a short description of the circuit opening relay operation:
There is a black&red power wire that comes from the EFI fuse... this is what the relay switches to the fuelpump. The switched power line to the fuelpump is light-blue&black according to the manual.
The relay has 2 separate control coils that it uses to switch power on.
One is only operated while the starter motor is turning...you should have 12 volts on the black&white wire while cranking.
The permanent control voltage comes from the ECU when it's started...that's the green&red wire.
The ground wire is white&black..(white with black stripe).

You should be able to check the relays operation with that info.
With that I conclude my over the top technical bla-bla.

Good luck..hope you get it fixed soon

[Apolan]

i had a problem w/ the fuel pump when i did more spirited driving. It had a rusty ground(-) connector..

[Kas]

I will check relay, I think that he is problem, or relay ground.

Is ground conected near relay under little fuse box or somewhere else?

[Apolan]

I dont knw if there is a separate ground for the relay- One is of course on the fuel pump itself..

[Ivan141]

I dont know exactly which relay it is...but I've seen most of them on that side and they're mostly attached with a connector that goes directly to the wiring loom.

[Kas]

A day ago, I check fuel pump relay, he is working fine so I decided to conect two test blubs to the relay for testing wiring loom of relay.

When engine stop, I'll see which connector has faulty or something thru test blubs.