How does the cold start valve work on a Mercedes M103?
On the M103 intake, the cold start valve will really flood the middle cylinders while leaving the outer cylinders excessively lean at higher engine speeds and higher loads. Because of this, firing the cold start valve for fuel enrichment in a forced induction engine isn’t really the best strategy.
Why does my Mercedes car keep running hot?
They’re designed that way, to keep your peace of mind. In reality, your engine temperature is always going up and down, that’s why there’s a thermostat in the car; to help stabilize the temperature and keep it in the range where your engine operates best. Mercedes didn’t do that.
How does the cold start valve work on a car?
Both of these effects aid in starting a cold engine, and both effects serve to enrich the mixture to make starting a cold engine easier. The first, most obvious operation is that the cold start valve squirts gasoline into the intake, serving to give the engine a richer mixture to make it easier to start. This is the most obvious function.
What should the temperature be in a Mercedes 107?
The thermostat in the 107 is designed to open at 80C, or about 175F. Your car should run at or slightly above this temperature, under most conditions. However, your engine is also designed to operate as high as 110C, or 230F for short periods. Under heavy operating conditions, don’t be surprised to see the temperature creep up.
On the M103 intake, the cold start valve will really flood the middle cylinders while leaving the outer cylinders excessively lean at higher engine speeds and higher loads. Because of this, firing the cold start valve for fuel enrichment in a forced induction engine isn’t really the best strategy.
They’re designed that way, to keep your peace of mind. In reality, your engine temperature is always going up and down, that’s why there’s a thermostat in the car; to help stabilize the temperature and keep it in the range where your engine operates best. Mercedes didn’t do that.
Both of these effects aid in starting a cold engine, and both effects serve to enrich the mixture to make starting a cold engine easier. The first, most obvious operation is that the cold start valve squirts gasoline into the intake, serving to give the engine a richer mixture to make it easier to start. This is the most obvious function.
The thermostat in the 107 is designed to open at 80C, or about 175F. Your car should run at or slightly above this temperature, under most conditions. However, your engine is also designed to operate as high as 110C, or 230F for short periods. Under heavy operating conditions, don’t be surprised to see the temperature creep up.
How does the idle control valve work on a Mercedes Benz?
For CIS-E cars, the CIS-E controller operates the idle control valve and adjusts the mixture based on its coolant temperature sensor input.
How long does the cold start valve work?
The cold start valve only operates for seconds, not minutes. The exact time depends on how cold the coolant temperature is. The colder the coolant, the longer it will stay open. Also, the cold start valve is a starting aid only in the standard (stock) setup.
How does a VW CIS-E cold start valve work?
The late VW CIS-E cars used a “hot pulse relay” to provide a second ground path and pulse the thing with about a 10% duty cycle at a slow rate (two or so pulses per second) when the engine was hot.
Is it safe to remove cold start valve?
In answer to your question @irozen77 the valve (injector) itself could just be faulty and be leaking fuel. It’s really easy to remove and test it but be safe with the risk of fire obviously. You can remove it and position it into a large clear plastic bottle to see how it behaves.
What kind of engine does a Mercedes 300 SEL have?
It featured the company’s powerful 6.3-litre M100 V8 from the flagship 600 (W100) limousine installed in the normally six-cylinder powered but top-end Mercedes-Benz 300 SEL (W109). The result was a nearly 2-ton sports sedan with muscle car performance.
What’s the top speed of a 300 SEL AMG?
Special build 300 SEL AMG 6.8-litre road race cars. 6.8-litre engine fitted (315 kW/428 hp and torque to 610 Nm/450 lb-ft), the 300 SEL AMG could reach 100 km/h in only 4.2 seconds and a top speed of 265 km/h.
What causes the throttle body on a Mercedes to fail?
When there are throttle body malfunctions the wrong amount of air enters into the engine causing problems with air/fuel mixture ratio. Here is a close up picture of a Mercedes throttle body. Mercedes throttle bodies made by Bosch and VDO may fail. Luckily these units are repairable.