Mercedes W126 3.8 5 4.2 5.6L in-depth tutorial of root cause of idle increase with temperature rise

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Mercedes W126 3.8 5 4.2 5.6L in-depth tutorial of root cause of idle increase with temperature rise

Рет қаралды 4,113

2 жыл бұрын

Note: this Video was uploaded on November 13th, 2021 but didn’t go live until the afternoon of November 14 because it took KZfaq 16 hours to upload and then several hours to process because of the length and Quality of being 4K.
In this video we will be covering the exact root cause of the phenomenon of increasing idle rpm when reaching operating temperature.
This video primarily covers the M 116 & 117 engines 3.8L, 4.2L, 5.0L and 5.6L but is also applicable to M 120 6.0L V12 engines and basically which operates by the suction principle ( Saugermotoren ).
We examine the relationship between timing chain and camshaft offset errors and how they produce additional vacuum with rise in engine temperature and the different options available to correct the issue with simple methods to a full engine rebuilt and how to determine when what repair method is good enough.
Further we are celebrating the 1 year anniversary of my purchase of my 560SEL with a mileage marker of 330,000 miles today
To buy a 42mm (1 5/8”) Plastic Pipe as indicated in video, please sent US$ 3.00 for each piece to cashapp:
$peapvp
Please add your ship to address in comment of the cashapp transaction when sending.
Shipping only in 50 US States, Puerto Rico and Guam via USPS First Class Letter ONLY!

Пікірлер: 21

@georgesand4629 2 жыл бұрын

Mercedes should sponsor you as a ICV expert

@douglasbelliveau3475 2 жыл бұрын

I just wanted to thank you for all your videos ,I worked as a factory tech in ny,In the 70-80 i along with the German techs.on problem cars.I forgot a lot on the Ke system,I own a 1987 560sl that I purchased it in original condition with 71;000 miles.always doing something on it thanks again Doug

@grungedude2 2 жыл бұрын

Thank you for sharing your knowledge with us, greatly appreciated.

@rioraton Жыл бұрын

Hi, question instead of adjusting a used ebay ICV why did you not buy a new one? Also, I have a 92 500sl and having a cold start problem. The car is hard starting. If I crank it for 4 seconds and turn off the ignition and then restart in starts right up. If I just continue to crank it till it starts it takes 15-20 seconds and then barley starts. in both cases it has a rough idle till it reaches temp. Once it reaches temp idle smooths out more or less and the idle will flux between 650-850 and back to 650 when the ac kicks in it will drop back to 650 is this a sign of a faulty ICV? I was thinking of replacing with a new one and rubber too. I also need that tubing do you take paypal or check I have never used a cashapp how does that work

@inovahightechltd Жыл бұрын

Check my playlist: the big repair There you will find all the issues behind your problems Happy new year Peter

@rioraton Жыл бұрын

@@inovahightechltd can you point me to that video? Thanks

@inovahightechltd Жыл бұрын

@@rioraton I sure can, playlist with 14 videos “The Big Repair” kzfaq.info/sun/PLO4ZlzALkZVq3NysVV7vqO7BiZ9Kd_97D Grab your self a couple of your favorite beverages, stream the KZfaq videos to your 85” big screen, sit back and relax! Peter

@alansgarage8545 9 ай бұрын

I have 1986 560SEC. I watched all your videos relating to idle speed control. Is the control signal that is going to the speed idle control coming from the ECU? You indicated in your videos that it takes about 1.4 amps to close it. When closed, does this lower the idle speed then?

@inovahightechltd 9 ай бұрын

Which control signal are you referring too? My guess would be the rpm signal which Mercedes / Bosch calls the TDC signal. This signal originates from the ignition control module and goes to the fuel pump relay, a/c compressor relay, idle speed control unit, ECU and ACC And, yes, the more closed the idle speed control valve is, the lower the idle rpm. The idle speed control unit drives this valve with a pulse width modulation controlling the current. However, the control unit can source only approximately 1.1 Amps this is why the spring may have to be readjusted

@alansgarage8545 9 ай бұрын

@@inovahightechltd thanks for the summary. Is the 1.1amps coming from the ECU? If so, then at which circumstances does the ECU send the 1.1 Amps to the idle control? My car idles at 1000rpm and there is no change in RPM speed if I disconnect the plug from the idle control, hence, I’m assuming that the AC was not sending the signal, or a faulty wire connection?

@alansgarage8545 9 ай бұрын

Meant to say ECU not AC

@inovahightechltd 9 ай бұрын

@alansgarage8545 no, the ecu has nothing to do with idle speed The idle speed control unit controls the idle speed

@inovahightechltd 9 ай бұрын

The idle speed control unit and idle speed control valve are two different parts. The idle speed control unit is a black box with pins on the bottom, same size as fuel pump relay and sits in the passenger footwell under the dash

@Ozkan_Ozturk Жыл бұрын

Hi, do you still have this tubing (ICV hose connection tube, 42mm) for sale? video timing 9:04 A 000 987 26 27?

@inovahightechltd Жыл бұрын

Yes

@Ozkan_Ozturk Жыл бұрын

@@inovahightechltd thanks, I tried cashapp but it doesn't work for me. Even I am in US, it doesn't send me a login code neither thru my phone, nor my e-mail!. Do you use Zelle?