OK small update. Been having a hard start when the engine gets to operating temp. With the above pressure gauge still installed I could see the rest pressure drop off pretty quickly. As most of the fuel related components have been replaced with new or refurbish to operate correctly that left the accumulator under the car. I could not find the original Bosch part 0438170021. After calling Bosch they said the new replacement number was 043817007. So that is what I bought. First the new part is physically smaller than the old one. So I could not use the OE clamp to secure it in place. A medium size hose was used instead. Also you need to move the part as far forward as possible otherwise the the fitting that connects the acc. to the fuel pump will not line up.
The old part would not disconnect so I disconnected the front hose from the metal line, (15mm line wrench and 14mm on the hose end). Undid the clip holding the small hose to the rear nipple. Forgot to mention you have to remove the 3 12mm bolts hold the carriage plate. You will have to remove the 2 10mm nuts and bolts that hold the fuel in place. Don't disconnect the fuel pump fittings.
It helps to remove the rear right rubber cushion to access the 10mm nut and bolt on that side. Everything went well but at the end when started the car I had a small fuel leak from the nut at the end of the check valve. I guess some things got moved around.
This is where it went down hill. I could not get the nut to tighten. The check valve has an 18mm fitting but you really can't get a good hold because of the wire connections to the pump. Even removing one of the electrical connections it was hard to grab the check valve and tighten the 19mm nut. It also didn't help that I have a torn tendon in my right shoulder so I couldn't exert a lot of force. When I finally did man handle the part the connecting tube broke. Good thing I had a spare.
Still I could not stop the leak. Must have taken the parts on and off at least 3 times. And yes gas will come out off the rear fitting on pump and other places too.What a PIA. Had to get a large container to catch the gasoline.
After several attempts I remembered reading about sanding flat the copper washers and then heating them. SO out came the sand paper and all the copper washers were sanded smooth then heated with a small torch. Reinstalled everything again for the the 100th time and had success. Finally. A 2 hour job at most took the better part of the day. One word of advice when putting it all back together. Wait until you bolt the carriage plate with the fuel pump to the body before you try to pull the rubber cushion through. The fact that it is loose helps putting back that one nut and bolt. And once everything is bolted together it makes it easier to try and push the rubber down through the hole.
Note size difference
Hose clamp to hold the part, make sure it is REALLY tight
Old clamp had a hold that lined up with the bracket so it wouldn't spin around. Can't use the clamp. Also new part has 2 protruding "beads" on it. Hence why the c-clamp needs to be tight otherwise it won't hold.
Just disconnect this rear rubber cushion to access 10mm nut and bolt. And don't put it back until everything is bolted back in place, the 3 12mm bolts.
Time for 2 Alieve.
One more note I can turn the car on and off. Or leave it on for while, turn it off and it will start right up. Pressure gauge holds steady at 40psi then very slowly after a while go down. I'm happy. More testing maybe tomorrow or monday.
sorry for the long post