QuestionQUESTION: Where is the fuel pressure regulator located. I've done some research is why I am slow to respond. I found that to adjust my air regulator I would have to in a way break into a space and replace it. Is this the same as the fuel pressure regulator? I looked and saw a "full throttle" switch. Could this be the problem? I'm wondering if this problem is something that I can make adjustments to or will I need to take it to a dealer. My wife is shooting for me to take it in but I was thinking that if this problem only happens when I engage full throttle then it is not a priority as I am not in the business of racing. PLEASE HELP!!!
ANSWER: I got to thinking , your pressure regulator may not be adjustable. The pressure regulator for that model looks silver back along the firewall somewhere, it has three connections and a rubber hose off the top, if the diaphram is bad then excess fuel runs into the valve cover, make sure the rubber line is in tact and , it should not have gas in it.
So lets make sure all this has been tested
You need to test the idle contact switch on the throttle housing., If you can OHM the the contact, it should show less than 1 OHM at rest.
If this is good, check for air leaks. They happen on that motor from broken booster vacuum check valves and loss of a capping plug from a large unused pipe midway down the intake passenger side. Also the rubber breather hoses the connect to the idle control valve, and the 2 hoses from the smog pump to the engine. Those would be the easy ones to see.
You can also do the following remove the airfilter and have some one crank the motor while you gently press the airflow meter flap down. If there is no pressure on the flap, then you have a fuel pressure problem. If pressing it down starts the car and the motor races, it is because unmetered air is entering and when given appropriate fuel the engine runs the speed corresponding to the amount of air entering.
Also make sure the injectors are not leaking or the fuel filters are clean
let me know what you find
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QUESTION: I lucked out and found a 560 engine in the salvage yard. I took off the control mixture. What else do I need to take off too combat my hard acceleration problems? I also got the radiator, fuel pump and going to get the a/c compressor.
ANSWER: look for the connection and item that sits on the side of the intake manifold, should be less that a half inch thick 2 X2 box, may be black ( if it has one)
Also grab the unit on top of the fender well with vacuum hose running to the back of the engine , should be on drivers side
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QUESTION: Is there a website where I can type in a part number and learn what part I have? I picked up some parts in the salvage yard but don't know what part I have.
Answerif it is an original MB number , just google it and it will show up in the varrious parts houses that carry MB parts.
You can also try here if you know the year of the car
http://www.autohausaz.com/mercedes-auto-parts/?src=benzworld&bid=1
good luck
Ron
