CSR: Fuel Pump keeps blowing fuse.

[pethier]

I have a CSR 260.   I could not get it to keep running at start-up.  Discovered the fuel-pump fuse (Fuse M, 15-amp) was blown.  Replaced fuse.  Car started and kept running. 

 

Trailered to an Evolution school.  While an instructor was driving the car, it quit on-course.  We pushed it over to my rig.  I changed the fuse and the new one blew.

 

 

I suspect that there may be a transient that is blowing the fuses.  These are the blade-type fuses in the color-coded plastic housings.  Does anyone make slow-blow fuses in this format?

Edited 17 hours ago by pethier

[7Westfield]

Can you find a schematic for the car?   Verify that 15 is the correct amperage

Maybe it just needs a 20

 

you can also buy auto reset breakers that plug in

[demoray]

I checked mine, and it matches the owner's manual I have, which says a 15amp fuse for the fuel pump.  I've had to replace other fuses, of which I now keep a suite of spares my traveling toolkit, it's been for shorts that I've found addressed.  None for the fuel pump as of yet.

 

I don't think I'd use an auto-reset on the fuel pump, but while you're tracking it down perhaps a Manual Reset fuse would save some frustration.  I know my fuse block is rather annoying to interact with, given its position underneath the scuttle.

[Scott_]

To test if  the fuel pump power wire chaffed to ground unplug at the pump and see if a fuse still blows (or check continuity).  

Absent a wire grounding out you might have a failing or clogging pump that is drawing more amps as it is used.   If the fuse is blowing after the pump is in use for a while you might try to use a clamp meter to track the current draw or just proceed to replace the pump.

 

Scott

[pethier]

I have not yet been able to locate the fuel pump. 

 

Is it in the tank?  If so, where does the power wire enter the tank?

 

If I must remove the trunk floor, there is a fire-suppression system mounted on the center of the trunk floor.  I don't know anything about these systems.

[7Westfield]

Pump in tank pretty common    Westfield uses a Ford unit I think

pump and gauge in common unit with some sort of twist ring retainer

probably 3 wires in a pigtail        pump,gauge,ground

 

What kind of fire system    pics?

the ones we use on FF are pretty simple

[pethier]

20 minutes ago, 7Westfield said:

 

 

What kind of fire system    pics?

 

 

[Croc]

It’s an in tank pump. Some rover unit from recollection - I have posted its part number on here at some point - a search could find it.   You can buy them (without the float mechanism - reuse old one) from Rimmer Bros in the UK.  It drops in the top of the tank, driver side.  You will need to remove the shroud around filler pipe, boot carpet, and boot floor to reveal.  

[Croc]

16 hours ago, 7Westfield said:

Can you find a schematic for the car?   Verify that 15 is the correct amperage

Maybe it just needs a 20

 

you can also buy auto reset breakers that plug in

CSR schematic is in Library - I put it there.