Fuel pump
#1
Racer
Thread Starter
Fuel pump
So having taken my 1999 C2 out of winter hibernation finally, I usually try to drive it to burn off the tank of stabilized fuel as low as possible before filling it with fresh fuel. Well the other day as I'm cruising around I start noticing a rattling noise. Fuel gage indicated a bit below half. Sounded like a ball bouncing around in my fuel tank so drove the mile or so home to investigate. Tore the frunk carpets out in case I left a socket or something in there, but found nothing. Found that I could reproduce the sound by rocking the car side to side. Jacked it up and removed the under panels and carefully listened from below while rocking the car. Definitely coming from the tank area. Could it be a faulty fuel sender or is it the pump? No check engine light, no codes. I'm stumped!
#2
Rennlist Member
I seem to recall someone having this issue here. A plastic ball comes out of the pump or sending unit. Unless I was dreaming.
#3
Racer
Thread Starter
Originally Posted by 808Bill
I seem to recall someone having this issue here. A plastic ball comes out of the pump or sending unit. Unless I was dreaming.
#4
So having taken my 1999 C2 out of winter hibernation finally, I usually try to drive it to burn off the tank of stabilized fuel as low as possible before filling it with fresh fuel. Well the other day as I'm cruising around I start noticing a rattling noise. Fuel gage indicated a bit below half. Sounded like a ball bouncing around in my fuel tank so drove the mile or so home to investigate. Tore the frunk carpets out in case I left a socket or something in there, but found nothing. Found that I could reproduce the sound by rocking the car side to side. Jacked it up and removed the under panels and carefully listened from below while rocking the car. Definitely coming from the tank area. Could it be a faulty fuel sender or is it the pump? No check engine light, no codes. I'm stumped!
#6
Rennlist Member
There is a plastic ball that resides in the end of the fuel inlet tube (part #11) of this diagram, it has become dislodged.
Dr. h.c. Porschetech3
Dr. h.c. Porschetech3
#7
Racer
Thread Starter
Originally Posted by Porschetech3
There is a plastic ball that resides in the end of the fuel inlet tube (part #11) of this diagram, it has become dislodged.
Dr. h.c. Porschetech3
Dr. h.c. Porschetech3
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#8
Rennlist Member
I don't recall how buoyant the ball is, it may help with leakage on overturn, may also help to keep from overfilling and flooding the charcoal canister on fillup. It would be safe to retrieve ball and replace tube so it will function as designed.
#9
Rennlist Member
I believe the fuel pump removal procedure - at least to open the top access port - isn’t that hard to do? Hard to see in there maybe, but an LED flashlight an/or an iPhone camera with light might be enough to see what’s in there?
#10
Racer
Thread Starter
Yes I think I will order a new gasket (only a few pesos) and have a peak. I put it out there to see if anyone had experienced a similar thing and could give a definitive answer so that I could just order parts and do it all in one go but alas...I shall investigate further.
#11
Rennlist Member
"Hard to see in there maybe, but an LED flashlight an/or an iPhone camera with light might be enough to see what’s in there?"
^^ Just don't use a match or a lighter...
^^ Just don't use a match or a lighter...
#13
Yes I think I will order a new gasket (only a few pesos) and have a peak. I put it out there to see if anyone had experienced a similar thing and could give a definitive answer so that I could just order parts and do it all in one go but alas...I shall investigate further.