Stalling after 15 minutes

[CraigD]

My friend began to have trouble with his 280SL stalling after 15 to 20 minutes - every time!  It's a very well cared-for car.  Rarely driven, garaged, low miles (maybe 60k).  His local mechanic replaced ignition parts and returned the car.  Result: same problem!

The problem was then reviewed again, more carefully.  The real problem:  dirt and debris in the fuel tank.  Here's a picture of the dirt found in the fuel tank / flower pot. 

My car has a similar history... makes me realize what one of my projects will be next summer:  remove and clean the gas tank!

[ja17]

Hello Craig,

Yes, we have seen this problem so many times before. A fuel pressure and delivery check pinpoints this kind of problem. The fuel pressure begins to drop off right before the car stalls. Also removal of the fuel sending unit in the trunk will allow a visual inspection of the inside of the tank without removing the tank.

[Mike K]

Hi Craig,
I had a very similar issue with my "new" 280SL which I bought in October. Mine kept stalling as the fuel level got to 1/2 tank. When I opened the tank up I had 2 cup fulls of rust and dirt pouring out.
Depending on the state of the inside of the tank, I'm not sure cleaning the tank is a permanent solution. I ended up replacing both the tank and fuel pump with new ones.

When you do get around to doing this, check the engine fuel filter as well for debris caught up there. Also disconnect the fuel line at both ends, from the fuel pump at rear through to the engine fuel filter and blow compressed air through that to clear any muck out.

Best,
Mike

[mdsalemi]

We've been here before.  Once the rust like that begins, it doesn't stop. Sure you can clean it out, but it keeps on coming. The rust is there because the inner coating of the tank is compromised and the only solution(s) are coating the inside--a big band aid with as many failures as successes, if you read about it, or replacing the tank. If you go the coating route, be wary of the plastic flower pot and take advice from those here who have done this successfully.

[Jonny B]

I will throw in the standard safety warning. Be very careful when cleaning/removing the gas from the tank. Have plenty of ventilation and keep the heat sources away!