why doesn't my car exist? - PeachParts Mercedes-Benz Forum

MarcAllen · #1 11-13-2016, 08:50 AM

Quote:

Originally Posted by 97 SL320

A few things on the accumulator.

There will be 2 threaded lines for pressure and a small hose for a vent to the tank.

Pull the small hose , turn on the pump and see if fuel continues to come out of the accumulator, if so the diaphragm is bad. Note, the other end of the small hose should go back to the fuel tank so be sure to crimp it off otherwise you will have a flood due to gravity.

The internal spring could fail but I'd call that rare.

Have you installed a fuel pressure gauge and watched it? If engine off fuel pressure stays up, you don't have an accumulator problem. Also, a temporary way around an accumulator that does not hold pressure is to manually run the fuel pump until you have pressure then try to start the car.

Thanks for that! I won't have a chance to look it until next weekend. I haven't put a gauge on it but it starts fine cold, but if you leave it longer than 5 or 10 minutes it starts hard, so I figure it's either the accumulator or the WUR, and I really do not want to buy a WUR if I can avoid it, so I'm hopeful.

Diseasel300 · #2 11-13-2016, 09:00 AM

Quote:

Originally Posted by MarcAllen

Thanks for that! I won't have a chance to look it until next weekend. I haven't put a gauge on it but it starts fine cold, but if you leave it longer than 5 or 10 minutes it starts hard, so I figure it's either the accumulator or the WUR, and I really do not want to buy a WUR if I can avoid it, so I'm hopeful.

That's exactly how my SL was when the accumulator went south. Cold it would fire right up....instantly in fact. But if you parked in front of a convenience store and dashed in and out, it was quite an embarrassing show trying to get it to restart! Wait for 45 mins or so, and it would start back up again, but not as well as when cold.

FWIW, the accumulator on my car was different from the 1981+ models used on the US cars. It only had 1 fuel inlet and the vent line and had to be special ordered. Car-Quest was able to take the original one and cross the number over, so that may be something to consider.

clarkz712 · #3 11-14-2016, 11:26 AM

try serching for the part by part number look on your old parts for the numbers then google that number