1980 124 no power at fuel pump

Gotta love that wiring . . .
Post Reply
Hugh1545

1980 124 no power at fuel pump

Post by Hugh1545 »

I know this gets asked a lot and I double checked through all the answers and found some conflicting opinions so I will ask again.

No fuel flow while the engine cranks over:

Removed pump, hooked pump to direct power and she spins and shoots fuel.
took pump back under the car(not mounted just held in my hand) and hooked up the wires, turned key to on...nothing.
Searched and searched for a fuse holder under the dash....is there really one up there? and is this the next check?
I would guess relay is next? can it be tested?
Also searched around the tail light assembly for a ground wire for the fuel pump as they says its there? could not find anything. Can someone possibly guide me as to where this sneaky ground is?

Again to confirm: 1980 124 spider injected, bosch fuel pump

Thanks in advance, Hugh in Pickering Canada
vandor
Posts: 3996
Joined: Sat May 23, 2009 1:23 pm
Your car is a: 1971 124 Spider
Location: Texas, USA

Re: 1980 124 no power at fuel pump

Post by vandor »

Yes, there is a separate fuse holder somewhere behind the fuse box, should have a green/black wires going into it.
Csaba
'71 124 Spider, much modified
'17 124 Abarth, silver
http://italiancarclub.com/csaba/
Co-owner of the best dang Fiat parts place in town
User avatar
courtenay
Patron 2020
Patron 2020
Posts: 1321
Joined: Mon Nov 30, 2009 11:41 pm
Your car is a: 1980 Spider 2000
Location: Courtenay, BC, Canada

Re: 1980 124 no power at fuel pump

Post by courtenay »

Did you turn the key to "on" or "start"? You need to get the key to "start" to activate the dual relay to send power to the fuel pump. You can also activate the dual really by taking the cover off the AFM and moving the lever to open the AFM flap. You should hear a click from under the dash from the dual relay.
Bruce Shearer
'80 Spider Fi
'10 Volvo XC70
'06 GMC 1 Ton PU
'72 Spider a long, long time ago
User avatar
bradartigue
Posts: 2183
Joined: Thu Sep 20, 2007 2:35 pm
Your car is a: 1970 Sport Spider
Location: Atlanta, GA

Re: 1980 124 no power at fuel pump

Post by bradartigue »

courtenay wrote:Did you turn the key to "on" or "start"? You need to get the key to "start" to activate the dual relay to send power to the fuel pump. You can also activate the dual really by taking the cover off the AFM and moving the lever to open the AFM flap. You should hear a click from under the dash from the dual relay.
The key has to be in the on position and the AFM flap has to be moving in order for the fuel pump to do anything. A failure of the dual relay will keep the pump from running, so will an air leak in an injection hose (not enough force to open the AFM = no fuel pump power). Of course there are fuses to check as well.
Post Reply