90socalvert

iTrader: (2)

Anybody know if fuel level senders are interchangeable from s4 to s5? I have a 90 vert and i pulled a fuel level sender out of an s4 at a junk yard and didnt want to waste time taking mine out if it isnt going to work.

farberio

iTrader: (7)

The tank size is different between S4 and S5, so it may read a bit off.

beefhole

iTrader: (29)

The tank size doesn't matter, as the sensors output the same resistance regardless of the series or engine. However, the wiring is different I believe. It would be easier to find one from the same series, but you could make another work.

90socalvert

iTrader: (2)

Alright id rather not change wiring so ill just buy an s5.

farberio

iTrader: (7)

The sensors output the same resistance at the exact same angles? Or do the sensors output the same resistance at empty and full?

beefhole

iTrader: (29)

Yes, the sensor resistance outputs are the same. I replaced my sender a while back and checked both manuals. I believe they are the same at full, medium, and empty.

farberio

iTrader: (7)

That's why I think the S4 will be off in a S5 tank. The s4 tank is shorter then the s5 tank. So if you put a S4 fuel pump assembly into a S5 it will not draw the last couple gallons of fuel.

Meaning the S4 fuel level sender should be shorter then the S5 fuel level sender. Thus in a S5 tank the S4 should read empty faster then the S5 sender because the sender will think its at empty before its truly the case.

Catch my drift? Sometimes I suck at explaining things....

beefhole

iTrader: (29)

^Understood. I'm not 100% on the "depth" of the tanks. That's the key there. Fortunately, it's not a common issue