MG-Cars.net

Welcome to our resource for MG Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MGB Technical - fuel pump voltage

hi, I have 12v going into a lucas electrical fuel pump on the white wire; whilst on the ground going out voltage is down to eight. the pump only works intermittently. Is there anything i can do apart from replace?

Ta
Iwan Jones

voltage on the ground should be 0v. which means either the cable, connectors or connection to the body is suspect.
Fit a new/change the ground cable and try again.
MGmike


M McAndrew

Where are you checking the ground? I'd expect it to be zero if the ground is good. I'd start by making sure the ground connection is sound. But make sure you're testing it correctly -- if you're getting 12v at the input and 8v at the output (i.e. ground) then the fuel pump is only "seeing" 4v and I'm surprised it would work at all....

EDIT: Looks like MGMike and I were crossposting!
Rob Edwards

This thread was discussed on 19/03/2012

MG MGB Technical index

This thread is from the archive. The Live MG MGB Technical BBS is active now.