I am starting this new thread in hopes to get more replies. I have a 560 that was gave to us by the father in law. I am starting to think he hates me being with his daughter. Just kidding. Anyways we parked our 560 and went to start it the next morning and it would not start. I have figured out that it is flooding get too much fuel to the cylinders. I have replaced the plugs, EHA valve and the fuel pressure regulator. If I take the line off the Fuel Distributor that goes to the regulator the car will start. I have checked the lines for kinks and even tried starting it with the fuel cap off. Could the fuel Distributor cause too much fuel pressure? Could a bad fuel pump cause too much fuel? I have checked the fuel pressure and get 100 psi at the main fuel line going into the fuel distrbutor. Shouldn't the regulator releive excess psi? I have heard the psi should be between 75- 85 psi? I am thinking of changing the fuel pump. I have changed one already because it was leaking. I was then going to have the fuel distrbutor rebuilt. Am I on the right track or should I start thinking the parts I got are bad? While we are at it does anyone know a good shop in UTAH. We took this car to Ken Garff for an alignment once and they quoted us $185 then called a couple of hours later and told us it was going to cost double that because we had custom after market rims. I argured this one with the tech and shop manager when I showed him that the rims were added from the original mercedes dealer and were mercedes wheels. We still had the paper work. They still wanted there money.

That fuel system operates at approx 100psi..unless the return line is blocked, I cant imagine you have too much pressure.

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I have checked return lines. That was the first thing I checked when I fiquerd out I had a fuel psi problem. If 100 psi is normal I am starting to lean more to maybe a problem with the fuel distributor. I have a line on a used one. I am thinking maybe something is wrong with it not being able to hold fuel psi until the engine needs it. I am not familar with exactly how it works but I am guessing it should hold back some psi. I am ready to throw in the towel after that. I am undecided to either sell the car or take it to a local shop and throw more money at it. Its a clean car with only 87,000 miles but its just getting to expensive on the maintance. THANKS

What about the injectors? I have been wanting to change them because the car has always seemed under powered. I was wondering if they would also be causing my problem? Do these style of injectors hold back some psi? I have an old set from our parts car and some I can blow air thru and some I can't. I thought they were plugged but, now I'm wondering if the are like diesel or new style of injectors were the psi is there until it reaches a certain pressure then realeses. I don't think I have a bleed off problem because after the car sits I can push down on the air meter plate and feel resitance not alot but some. Oh well just thinking maybe its time to take it to somebody who knows.