idahoporsche

hi
sorry i dont know how to find my old thread on this,, not really familiar with forums..

79 928 if i jump the power to the pump at the panel the car will start and run..

a new relay dont fix it

so ,, does some body know what the problem is ???

thanks

Russ

mantinger

I am new here and since a month own a 928.
Still learning by reading all the posts I can.
So, this is what I learned:

Watch your tach. Does it jump on cranking? If it doesn't; check the green wire connections.
The green wire comes out of the distributor.
The fuel pump relay is waiting for this signal to activate the fuel pump. So start here first.

Second: If this is okay, you may have a loose connection on your relay-panel. Or a loose/corroded
fuse.

AirtekHVAC

possible ignition switch issue?

idahoporsche

ignition switch is new

tried 2 new relays ,, neither made a difference

bottom terminal that the relay plugs into flashes when cranking .. i think this is the distr signal

relay clicks continuously when cranking I assume this is from the distr signal

fuse is good and contacts are good..

i dont understand the relays not working

Russ

Jørn

Hi, unless someone has been messing around with the wiring on the CE-panel, this behaviour sound like something that could occur if the relay only get's the distb. signal, and not the +12v signal from the ignition as well, which is also needed to power the transistor Circuit.

Measure terminal 15 to check that you have power through the ignition switch.