What should the idle speed be on a Mercedes Benz?
Normal idle, warmed up, should be right around 500 rpm. It should stay there very solidly.
Is there such a thing as high idle Hell?
Mercedes-Benz Tinkering – High Idle Hell I just went through High Idle Hellwith my ’83 380SL. It was idling at 1500, most of the time, and stalled on occasion. Here are some notes. This is a common problem with these cars. Examples: exampleexampleexample. (You may notice a common thread here: The computer.) Components
What are the components of the idle speed regulation?
For ’83, the components to the electronic idle speed regulation are: Idle speed compensator (aka slide valve) Idle speed controller (aka “computer” although it’s really an analog circuit) Overvoltage “relay” 16C temp switch
Why does my car idle at 1500 all the time?
Quick tests If your idle stays at 1500 all the time, most likely it is the electronic idle speed regulation. (If you want to simulate this in a properly working car, just yank the idle speed controller plug off.) Jiggle the connectors to the slide valve and the controller box.
How can I tell if my idle speed controller is working?
Check that the plug connected to the idle speed controller isn’t switched with that for the heater. Check for vacuum leaks(probably always a good idea). If It’s the Controller (Computer) If everything else seems okay, it’s probably the controller. From my research, this is it in most of the cases. Take the computer out of its plastic case.
What to do when your car is at high idle?
Take the computer out of its plastic case. Plug it back in to the connector and let the board just dangle. Start the car and let it run at its high idle. Start monkeying with the controller circuit board. (It won’t hurt you. You probably won’t hurt it, either — these are discrete linear components, pretty heavy-duty.
Is there a problem with the throttle sensor on a Mercedes?
Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. Symptoms of defective Mercedes throttle body or throttle position sensor include:
Is there a problem with the Mercedes possition sensor?
Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. Symptoms of defective Mercedes throttle body or throttle position sensor include: A common problem that you may notice is that the car drives fine under normal acceleration.
What does the throttle body do in a Mercedes?
The throttle body is where the throttle valve is mounted and is what control the amount of air that enters the combustion chamber. 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-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. Symptoms of defective Mercedes throttle body or throttle position sensor include:
Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. Symptoms of defective Mercedes throttle body or throttle position sensor include: A common problem that you may notice is that the car drives fine under normal acceleration.
How do you reset the throttle on a Mercedes?
First, try throttle reset procedure Turn the key to ON position. Position II that is. Press and hold the gas pedal for at least five seconds. Keep the pedal pressed. Turn ignition off but do not remove the key. Now release the gas pedal. Remove key. Wait a minute before you restart your Mercedes.
What are the symptoms of a defective throttle possition sensor?
Symptoms of defective Mercedes throttle body or throttle position sensor include: A common problem that you may notice is that the car drives fine under normal acceleration. If you press the gas pedal to the floor or try to accelerate quickly or floor it, the engine stops responding, RPMs drop and it may even go into limp mode.
How much horsepower does a Mercedes 240D have?
The engine produced a modest 67 horsepower at 4,000 rpm and 97 foot-pounds of torque at 2,400 rpm. Acceleration from 0 to 60 mph took well over 20 seconds. While the car had no problem cruising at 80 mph and even slightly above, getting up to that pace took considerable time and road space.
When did Mercedes Benz stop making the 240D?
A member of the the company’s W123 range, the 240D was produced from 1977 to 1983. It was viewed as the entry-level Benz in the U.S., and internationally it often saw duty as a taxi.
The engine produced a modest 67 horsepower at 4,000 rpm and 97 foot-pounds of torque at 2,400 rpm. Acceleration from 0 to 60 mph took well over 20 seconds. While the car had no problem cruising at 80 mph and even slightly above, getting up to that pace took considerable time and road space.
A member of the the company’s W123 range, the 240D was produced from 1977 to 1983. It was viewed as the entry-level Benz in the U.S., and internationally it often saw duty as a taxi.
How is the idle speed of an engine controlled?
The valve or motor is controlled by the engine control module, which will adjust the idle speed according to parameters such as engine temperature and electrical system load.
What happens if you open the hardtop on a Mercedes SL500?
If either of these are open, the retractable hardtop cannot operate. Once the lid and cover are shut, the hardtop switch may be used. Start the vehicle’s engine, and let the car run while you open or close the hardtop. The hardtop does not operate if the car’s battery voltage is too low.
What’s the top speed of a Mercedes SL500?
For instance, in 2001 the SL500 was specified as 6.1 seconds for 0 – 60 MPH, and the SL600 was 5.9 seconds, and each has the same 155 MPH top speed limiter. The SL600 has lots of torque just like the SL500, and it goes great even with part throttle.
Why does my Mercedes Benz idle speed drop?
All of these hoses have a tendency to get brittle with age and crack or snap. This will cause unmetered air to enter the inlet manifold which can cause lumpy idle and if the leak is big enough, an increased idle speed. And in extreme cases, the idle speed can drop due to weak mixture, but this is getting beyond the point of this discussion
Why is my idle speed higher than it should be?
With KE injection like yours, the idle is rarely perfect, however you have also stated that your idle speed is higher than it should be, so it is highly likely you have an air leak from one of the many hoses connected to your inlet manifold.
What is under the throttle body of a Mercedes Benz?
Under that throttle body is the inlet manifold which is responsible for channelling all the inlet gases to the inlet ports in the cylinder heads.
How to adjust engine idle speed on car?
Modern car use electronic throttle body and the only way to do the correct idle adjustment is to program the computer. Some older vehicles that us throttle body with manual cable did not need any special tools to program the rpms. However, we demonstrated on a modern car how you can adjust the idle speed.
Why does my car idle higher at start up?
So if there is a problem it isn’t that car idles higher at start up – its supposed to. Its that it is idling a little high to begin with, both at start up and after warming up. A small vacuum leak can cause that as can a sticking or malfunctioning idle air control valve.
What’s the normal idle RPM for a car?
What you want to do is find out where the car should be idling when it is completely warmed up. These days the normal range tends to be anywhere between about 650-900 rpm. 1000 is on the high side, and 1700 is certainly on the high side for cold start up. So if there is a problem it isn’t that car idles higher at start up – its supposed to.
So if there is a problem it isn’t that car idles higher at start up – its supposed to. Its that it is idling a little high to begin with, both at start up and after warming up. A small vacuum leak can cause that as can a sticking or malfunctioning idle air control valve.
What you want to do is find out where the car should be idling when it is completely warmed up. These days the normal range tends to be anywhere between about 650-900 rpm. 1000 is on the high side, and 1700 is certainly on the high side for cold start up. So if there is a problem it isn’t that car idles higher at start up – its supposed to.
What should the idle speed be on a 2008 Jetta?
Its normal for the 2008 jetta to idle at about 1500rpm at start up after its been sitting for a few hours. The technician also started a few other 2008 jetta’s on their lot and confirmed they all do the same thing. He told me that if I ever have any issue the dash with give me some type of indicator.
How do I get the idle speed controller to work?
(If you want to simulate this in a properly working car, just yank the idle speed controller plug off.) Jiggle the connectors to the slide valve and the controller box. If it has an effect, the plugs can be opened and the connections re-soldered.
What causes rough idle and low rpm at startup?
You start the engine cold and it will hardly run. It runs rough and idles very low and will even quit a few times. You may also notice that your ABS light comes on. After the engine warms up idle speed will increase and the engine may smooth out (although acceleration may have some hesitation until the engine gets real hot.
When does the ABS light come on at idle?
You may also notice that your ABS light comes on. After the engine warms up idle speed will increase and the engine may smooth out (although acceleration may have some hesitation until the engine gets real hot. But, the ABS light may continue to stay on while driving and you may experience a pulsing pedal when you stop (not always).
When does the engine stall in a Mercedes?
There are never any notifications on the dash or any signs of it beginning to fail. This typically happens when I’m slowing down at an intersection or just driving slower in traffic.
What causes the idle speed to go up or down?
The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on
What happens when a diesel engine is idle?
There is a simple check to carry out (similar to conventional) valves to check clearances. They do have precombustion chambers. When the engine is idling when cold is it at the normal revs or is it slower than normal ? Most engines will run roughly at lower than standard idle speed.
Why does my Mercedes 300 have 115 injectors?
For example, older 300 diesels used injectors that were used in the 240 and perhaps the 220 diesel engine (the number 115 sticks in my mind, but I am not certain). This may have been due to the lower fuel quality found in the remote areas of the world, and since the G engine is set up for different torque and rpm demands.
The throttle body is where the throttle valve is mounted and is what control the amount of air that enters the combustion chamber. 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.
You start the engine cold and it will hardly run. It runs rough and idles very low and will even quit a few times. You may also notice that your ABS light comes on. After the engine warms up idle speed will increase and the engine may smooth out (although acceleration may have some hesitation until the engine gets real hot.
How to troubleshoot an automotive engine high idle?
The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Step 1 – If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too.
You may also notice that your ABS light comes on. After the engine warms up idle speed will increase and the engine may smooth out (although acceleration may have some hesitation until the engine gets real hot. But, the ABS light may continue to stay on while driving and you may experience a pulsing pedal when you stop (not always).
Normal idle, warmed up, should be right around 500 rpm. It should stay there very solidly.
What was the color of the 1984 Mercedes-Benz 380SL?
1984 Mercedes-Benz 380SLThis very presentable 1984 Mercedes-Benz 380SL featured here with 2 tops is available in its original color code#568 of signal red with a parchment interior. The 380SL Comes…
Quick tests If your idle stays at 1500 all the time, most likely it is the electronic idle speed regulation. (If you want to simulate this in a properly working car, just yank the idle speed controller plug off.) Jiggle the connectors to the slide valve and the controller box.
Check that the plug connected to the idle speed controller isn’t switched with that for the heater. Check for vacuum leaks(probably always a good idea). If It’s the Controller (Computer) If everything else seems okay, it’s probably the controller. From my research, this is it in most of the cases. Take the computer out of its plastic case.
What was the fatal flaw of the Mercedes Benz Sprinter?
This article is being written to warn potential buyers of this vehicle of the fatal flaw hidden in each of these vehicles. Prior to 2008, when the United States Government mandated diesel exhaust regulations, the Sprinter, manufactured by Mercedes Benz and sold as a Dodge was a real workhorse.
What are the issues with rough idle and low rpm?
DOES NOT COVER: This video does not cover all the issues related to poor idle, rough idle, low idle, hard staring and ABS warning light issues. Please do not purchase this video if you are expecting a thorough explanation and walk through on the Bosch K-Jet fuel injection system.
What are the most common problems with Mercedes Benz cars?
8 Most Common Mercedes-Benz Problems 1 Rust. Rust behind license plate / trunk area. 2 Engine Mounts. Engine mounts on Mercedes-Benz cars are oil filled. 3 Suspension & Steering Components. Ball joint / front control arm. 4 Window Regulators. Broken window regulator on Mercedes C-Class. 5 AirMatic Components.
What are the problems with a Mercedes Benz?
Top 5 Mercedes-Benz no start problems 1 Engine Click, No Start 2 Engine Dies Right After It Starts 3 Car turns over, but it won’t start 4 The car makes a clicking noise but won’t start. Hint: Starter Problem or Low Battery 5 Key will not turn the ignition More …
When did the Mercedes Benz 300 SL come out?
MERCEDES-BENZ SL 300 – 1986 COD. MER00045 Frame no. WDB107411A048456 Power 188 hp at 5700 rpm Max speed 203 km / h Acceleration from 0 to 100km… More The 300 SL was produced from 1989-1993.
What kind of transmission does a Mercedes 300SL have?
More 1993 Mercedes-Benz 300SL 5-Speed ManualThis rare R129 example is equipped with a 5-speed manual transmission.Reportedly fewer than 200 stick-shift 300SLs are said to have… More The Mercedes Benz 300SEL 6.3 is often credited as the precursor to the brand’s now-ubiquitous performance subdivision: AMG.
Where can I buy a 1991 Mercedes Benz 300SL?
This 1991 Mercedes-Benz 300SL was ordered from the Mannheim Branch and sold new in Germany. It was imported to the United States in 2020… More To Be OFFERED AT AUCTION at RM Sothebys’ Milan event, 15 June 2021.
Is there a 1956 Mercedes Benz 300SL for sale?
1956 Mercedes-Benz 300SL COUPE, Sold new at Hollywood Mercedes Benz Los Angeles in 1956, has been in Hollywood/LA all its life. Owned… More 1993 Mercedes-Benz 300SL 5-Speed ManualThis rare R129 example is equipped with a 5-speed manual transmission.Reportedly fewer than 200 stick-shift 300SLs are said to have…
Are there any idle control valves for Mercedes?
We stock idle control valve parts for most Mercedes models including 560SL, 300E, 500SL, 190E, 380SE, 300SE, 420SEL, 500SEL, 300CE, 260E, 300SL, 560SEL, 380SEL, 300SEL, 560SEC, 500SEC, 300TE, 380SLC and 380SEC. The replacement idle control unit was competitively priced from Geekparts.
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.
The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on
What happens when the idle control valve fails?
When the idle control valve fails it can cause all sorts of issues with the vehicle, and in some cases may even render it undrivable. Usually a bad or failing idle control valve will produce a few symptoms that can alert the driver of a potential issue. 1. Irregular idle speed