Engine hesitate on load

[smokin]

low pressure with low amps usually suggests wiring. checking earth first the way you suggest is good. fingers crossed

[John Scherrer]

That fuel pump fuse feeds power to the Fuel Pump relay which is one of 4 relays inside a black box mounted beside the ECU.

The box just lifts off ..
Check the connections - try removing the 2 plugs and reseating several times.

It's possible the relay inside has damaged/burnt contacts - it doesn't take much resistance at 20 amps to cause issues ..

[John Scherrer]

Relay housing location

[John Scherrer]

Credit to Tom's Seven whose web site has moved - took some finding !

This is the Fuel Pump relay diagram - may be slightly different ..

Note that there are 2 fuses in the Atom fuse box ..

B2 30 Amp Fuel Pump Relay
D5 15 Amp Fuel Pump/ECU

[John Scherrer]

Connector 1 Pin Outs

[John Scherrer]

Connector 2 Pin Outs

[Paros]

[quote="John Scherrer"]
Credit to Tom's Seven whose web site has moved - took some finding !

This is the Fuel Pump relay diagram - may be slightly different ..

Note that there are 2 fuses in the Atom fuse box ..

B2 30 Amp Fuel Pump Relay
D5 15 Amp Fuel Pump/ECU
[/quote]

Thanks for the info, I will try it as soon as possible.
Unfortunatelly my electrical knowledge isnt what it should be...

Do I check if the intertia switch is closed?

[benyeats]

The relay box is off an MGF, and probably a load of other Rover cars if you are looking for a replacement.

I think I may have a spare one in the garage if you want to borrow it for testing.

[Paros]

I have cleaned and mounted/unmounted the connectors to the fuel pump relay several times. I have also cleaned the 2 fuses for the fuel pump.
But still ending upp with the same data as Before...
I have connected a cable from the - pool on the battery to the black wire that "I thin" goes to the fuel pump, but nothing happens. I have tried the same with the + pool on the battery to the Purple and White, but nothing happens.

If you think it could be the relay box, I would appreciate if you could send it to me for testing purpose. Rovers are not very common here in Sweden..

Or is there anything else I could try, could it be something else?

[Paros]

I think I have found one, is it YWB100970?
This comes from a Landrover Freelander -99
http://www.bildelsbasen.se/index.php?index=default&link=item&post_id=24551597

I have bought it and will test it in a few hours.

[John Scherrer]

Don't think we have an inertia switch ...

I've not tried but presumably the relay box comes apart and you could just swap over the fuel pump relay ...

[benyeats]

[quote="John Scherrer"]
Don't think we have an inertia switch ...

I've not tried but presumably the relay box comes apart and you could just swap over the fuel pump relay ...
[/quote]

Nope, it is a PCB inside with multiple relays

[Paros]

[quote="benyeats"]
[quote="John Scherrer"]
Don't think we have an inertia switch ...

I've not tried but presumably the relay box comes apart and you could just swap over the fuel pump relay ...
[/quote]

Nope, it is a PCB inside with multiple relays
[/quote]

It doesn't mather, ill soon have an other box to test with, I hope they are the same inside.

[benyeats]

[quote="Paros"]
[quote="benyeats"]
[quote="John Scherrer"]
Don't think we have an inertia switch ...

I've not tried but presumably the relay box comes apart and you could just swap over the fuel pump relay ...
[/quote]

Nope, it is a PCB inside with multiple relays
[/quote]

It doesn't mather, ill soon have an other box to test with, I hope they are the same inside.
[/quote]

What you can do if you open the box is manually close each relay using an INSULATED screwdriver.  I stress the insulated part as the starter relay is also in there and takes a lot of amps.

[Paros]

This can not be necessary if I change the complete relay box?