No.

You need to read up on how the CIS and the FD works.

I will try to give you a basic understanding. As the throttle opens, more air is pulled past the sensor plate, pushing it down. This in turn pushes the piston in the FD up increasing fuel flow to the injectors. If the piston sticks in the up position, you get a massive amount of fuel with no air which will soak the plugs.

If your pressure regulator is not working, you will get excessive pressure from the pump that overwhelms the metering of the FD and pours fuel into the cylinders through the injectors.

There is an o-ring on the piston that can leak and spill fuel directly into the intake manifold.

There are tons of posts on this, and a great book by Charles Probst.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe

Well I installed my regulator and my o-rings and still have too much fuel. I have checked all my lines for blockage and kinks. I find it hard to beleive I got a bad regulator. The car runs when you take off the line coming out of the Fuel Dis. and just let the fuel go into a can. One thing is different I am getting a small of amount of fuel coming out the regulator were before I had none? My questions are: Could a bad fuel pump cause to much pressure? Is there such a thing as too much psi wouldn't the regulator reileive too much psi? Would a bad Fuel Distributor cause too much fuel psi? Does the Fuel Distributor control any of the fuel psi?Could the EHA valve cause to much fuel psi? The EHA valve is also new could it be bad? I will start another thread to try and get more help.

Are you sure that your fuel return line (from the FD to the tank) is not blocked? On most models there is only a small tube going into the tank where the line attaches. This could be plugged. Cany you blow out the return line with compressed air from the FD end?

Did you verify that the piston in the FD was not sticking?

The only way you will find out what your pressures are is to get ahold of a gauge and learn how to use it.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe

I am sure the return line is not plugged. I can take the return line off the fuel regulator where it goes into the AC line and only get a small amount of fuel. I used hose from my fuel injector cleaner kitand got the same. I have blown all return lines out with air. If I take off the larger steel line coming off the FD going to reg. the car starts. I am starting to think either Fuel Distributor or I was sold a bad EHA valve.

I also verified the plunger was not sticking. When I took off FD to replace the o-ring I pushed oin on the plunger and it came back out. I then pulled on it to verify it was all the way out.