Fuel pump relay - replace those old relays chaps

[my250gt]

This was fun. Took the griff for mot, all fine. Passed.
Went to drive off the ramp and wouldn’t start.
Turning over but not firing.
Couldnt hear the fuel pump clicking. Mot tester checked voltage and said it appeared to have volts, must be the pump?

Changed the pump, found supply hose to pump was deteriorating 🫣 so got some hose too.
Nope, no change .

Checked relays both seemed to be clicking so out with the multimeter. Pump relay was activating for the two second start sequence but no voltage on output !

Took relay apart and noticed the contacts couldn’t touch even operated manually. The coil had moved about a 1mm on the core. Pushed it back into place and now worked again. Back in car and hey presto all running again.
Can only assume it had vibrated out of position over time and eventually contacts were not making contact.
Time to get new relays 👍

[Belle427]

The cause of quite a lot of issues so worth replacing. Make sure your other fuel hoses are in good nick too, worth replacing them if they are unknown.

[my250gt]

Yep got to take the tank out now to replace the tank to u bend tube. Dont think i can get to the tank connection otherwise.

[Loubaruch]

Where the fuel hose exits from the rear body to the bent brass tube there is usually about a tube of silicon sealant stuffed in there. If you remove the wodge of sealant you should be able to reach in to change the hose on the tank I would drain the petrol first though !

[Steve_D]

As said no reason to remove the tank. Lots of digging to get the sealant out but then access is no problem.
Please please please fit the best hose you can find. If the hose has the specification printed on it in big bold white text run a mile.

Steve

[my250gt]

Using this one, is it ok?

[my250gt]

Should be fine according to the description?

[Belle427]

No because it says not to be used on pressure lines on fuel injected systems, may be ok for tank to pump but personally id use something else.
These hoses are very good.
https://www.carbuilder.com/uk/ethanol-proof-fuel-h...
https://www.carbuilder.com/uk/ethanol-proof-fuel-h...

[lancepar]

The fuel pump relay on my Griff had water in it from a heater pipe leak that migrated down the wires.



No amount of fettling fixed mine.

[my250gt]

Haha yes beyond economical repair i would suggest…. :-)


https://www.tvrsswparts.com/fuel-pump-relay---m012...

Ordered my relays here, got to support our TVR suppliers.

Edited by my250gt on Monday 20th May 11:36