How does the warm up regulator work on a Mercedes Benz?
If your acceleration is muted the warm up compensator may be broken or on its way to being kaput. The warm up regulator increases the fuel flow making the flow richer. The warm-up regulator applies opposing pressure on the injector pins of the fuel injector.
What happens to the warm up regulator when the engine is cold?
When the engine is cold the warm up compensator reduces the pressure applied, which allows more fuel to flow to the injectors. As the warm up regulator heats up the pressure is increased.
What causes a warm up regulator to fail?
A warm up regulator failure occurs when there is a loss of pressure available from the warm-up compensator/regulator. Before you do any work on your car it is important that you wear safety glasses, work gloves and dispose of all fluids in a safe manner.
What causes a Mercedes Benz warm up regulator to fail?
Complementary Modification: When the engine is cold the warm up compensator reduces the pressure applied, which allows more fuel to flow to the injectors. As the warm up regulator heats up the pressure is increased. A warm up regulator failure occurs when there is a loss of pressure available from the warm-up compensator/regulator.
How does the fuel accumulator work in a Mercedes Benz?
The fuel accumulator is used to keep residual pressure in the fuel system, thus helping the engine re-start in high temperatures and preventing vapor-lock. Pelican carries replacements to get you back up and running. The Electro-Hydraulic Actuator valve is used to control fuel flow to the engine.
When the engine is cold the warm up compensator reduces the pressure applied, which allows more fuel to flow to the injectors. As the warm up regulator heats up the pressure is increased.
What’s the pressure on the warm up regulator?
The warm up regulator takes as input the fuel output line on top of the fuel distributor, which, by itself is system pressure (5.0-5.6bar), and lets some of this pressure drain to the fuel return line, so the pressure is reduced. Then this pressure is called the “control pressure” (3.0-4.0 bar).
What should the normal control pressure be on a Mercedes?
So if this control pressure increases, the counter acting force for the air flow sensor is greater, then the mixture is smaller. So what is the normal control pressure? It should be around 3.0 to 4.0 bar (more on the exact numbers later).
What is the Bosch code for the warm up regulator?
Moreover, when accelerating, there are vacuum ports in the WUR that can affect the control pressure too, for more details on the vacuum side of the WUR please read: Now, look at your Warm Up Regulator. It has a bosch code, for example 0 438 140 068.
If your acceleration is muted the warm up compensator may be broken or on its way to being kaput. The warm up regulator increases the fuel flow making the flow richer. The warm-up regulator applies opposing pressure on the injector pins of the fuel injector.
The warm up regulator takes as input the fuel output line on top of the fuel distributor, which, by itself is system pressure (5.0-5.6bar), and lets some of this pressure drain to the fuel return line, so the pressure is reduced. Then this pressure is called the “control pressure” (3.0-4.0 bar).
So if this control pressure increases, the counter acting force for the air flow sensor is greater, then the mixture is smaller. So what is the normal control pressure? It should be around 3.0 to 4.0 bar (more on the exact numbers later).
Moreover, when accelerating, there are vacuum ports in the WUR that can affect the control pressure too, for more details on the vacuum side of the WUR please read: Now, look at your Warm Up Regulator. It has a bosch code, for example 0 438 140 068.
What do you call a warm up regulator?
Playing with your K -Jetronic Warm Up Regulator, or WUR. Playing with your K -Jetronic Warm Up Regulator, or WUR. This little goody is a common culprit in K-jet or CIS problems, along with pumps, one- way valves, accumulators and fuel distributors.
How to do warm up regulator ( WUR ) calibration?
Warm up regulator (WUR) Calibration 1 Put the fuel pump relay back into place. This is important in this step! 2 Turn the engine on. It will run with a very rich mixture (because the control pressure is like 0.5 bar.) More …
A warm up regulator failure occurs when there is a loss of pressure available from the warm-up compensator/regulator. Before you do any work on your car it is important that you wear safety glasses, work gloves and dispose of all fluids in a safe manner.
What does the warm up compensator do in a car?
The warm-up compensator is also known as the warm up regulator. If your acceleration is muted the warm up compensator may be broken or on its way to being kaput. The warm up regulator increases the fuel flow making the flow richer. The warm-up regulator applies opposing pressure on the injector pins…
How to keep your Mercedes SL Class running smooth?
Keep your fuel injectors clean and your engine running smooth by regularly replacing your fuel filter. Follow these instructions for a cleaner running engine. Use this tech article to replace your fuel reservoir. If you are experiencing erratic acceleration, it may be time to replace the fuel suction dampner.
Do you need constant fuel pressure to run a Mercedes?
Mercedes-Benz engines need constant fuel pressure to run correctly. If your engine is giving you trouble it might be time to replace your fuel pumps. Everything you need to do the job is contained in this article.
How to replace window motor on Mercedes R107?
The panel is free to lift off the doorframe. Using a 10mm socket, remove the five nuts securing the lifting mechanism to the doorframe. There will be two pairs located near the window motor and one on the far end above the lock actuator. This will need to be done in order to be able to get to the window motor.