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Hello, Not even sure if this is still going but did anyone attempt this on a E320 cdi 2001 w210? Vacuum system still the same as this, just unsure of the wires i need to tap into. Any help appreciated!
Hi Lancelot. Thank you very much for your detailed explanation. I did everything what you expalined on my mercedes benz w202 c220 cdi 1999. First 2-3 minutes after starting engine everything is perfect. Car is gong well, black smoke is reduced but after some time car goes limp home mode. After disconnecting maf again everything is good. But I dont understand why car goes to limp home mode with maf connected. Before I faced the problem like this that is why I know that when car goes home mode it needs to disconnect maf. At that time priblem was that egr valve didn't work so maf put the engine to home mode.
Hi Guys,
W210 E Class 300TD
Bought my resistors and diode and just about to perform what seems from the posts an easy fix and I have some challenges.
Questions
The fattest module where all the computers are is the ECU? YES/NO
If so then there's three yellow and white wires in the ECU. Only one has two white stripes on it and that connects to pin 5 on the MAF.
When I try and test the MAF pin 5 (yellow and white wire), I can only do that by unplugging the connector to the MAF, Connecting my multitester to pin 5 and the other connection to earth. I get no voltage what so ever even if I rev the car... According to the above I should get 12volt ish and a drop of 4 or 5v when reved. This I am not seeing....
Can anyone help?
Thanks
Chris
When looking for the plug number, or is it pin number, it starts from the wing of the car, not the engine side, easy mistake to make.
But at which end of the connector? He He. That's my question seeing as how I can't get the yellow and white wire to give any voltage signal ay the MAF, I must try and count the pin number on the ECU connector. I have a '98 W210 E Class 300TD which this mod was orginally for? I should have a little faith and just go for it but I like the thread suggests, I need to be sure before I go spilcing in ciruitry to my lovely car's ECU.
Thanks anyone that can help further.
Chris
Hi,
I've had a reply on one of the forums I’ve been enquiring about this on. Thanks for the replies… I have a W210 E Class 300TD early '98. I eventually managed to detect some sort of signal with the MAF plug undone. Think it was impedance or Amps. When the car revved, the signal dropped. I then undid the ECU plug and tried to count the pin numbers and could come to no reasonable conclusion. The pin numbers were very different on the ECU end compared to what is on the thread. However, I left the MAF plug out and tested for the same signal at the ECU end once the ECU it was plugged was plugged in minus its outer mechanism. The same signal was detected on the Yellow wire with two white stripes. There's two other yellow wires with single white stripes. Beware! There is only one green and grey wire but there's a grey and pale purple wire which looks very similar. Beware!
Once the resistor and diode were in place I reset the gearbox ECU (easily done via YouTube video) and it’s been running very, very strong with less turbo lag. I can use the kickdown button with confidence now and only a minimal puff of smoke when jacked. Very happy with the result. Many thanks to all who made this possible and other reassuring me it was possible and I wouldn’t screw my ECU…
Chris
Reason I am posting is that I spliced in the resistor and diode into the ECU wiring to bypass the EGR and the car ran like a dream. The last couple of days I noticed that the EGR problem was back or whatever it is... I actually died on a hill when the car was cold. I’ve respliced in new components and will have to see. I did the amended version where only a 470 ohm resistor and one diode is used. No 1000 ohm added. Anyone else had problems with this and the EGR still trying to function with this MOD?
Hi Guys,
Just thought I've spliced the resistor and the diode only into the ECU harness, yet I still have the EGR transducer vacuum hose connected to the EGR valve. Do I need to disconnect the vacuum hose?
Chris
Hey Biff this is the W210 forum and although open to posting all sorts of helpful hints, misinformation and HS sometimes creeps in----go back to the original post and follow the OP's directions,but don't start whining if you have problems with your 19 year old rust bucket----ever think of starting to save for a newer car!
New on this forum. Can someone assist on how to delete EGR valve on my W203 C270 CDI with pics
It should all be on this thread. The main challenge is getting the right wires at the ECU end. I would think you car probably works in the same way. There's also other information on YouTube and other Merc. forums.
Have fun
Chris
I tried this MOD last year and it is not until recently have I realised that the suction pump is still operating the EGR. This MOD reads that you leave everything connected to the EGR -as I did - however, the EGR has still been causing problems and here's me thinking it had been deleted from operation. I have stripped and resoldered the exact diode and resistor to the exact wiring. I left out the original last resistor as this MOD says it is surplus to requirements. I would not have attempted this if I was unsure. Also I've worked on cars for over 35 years. I am no spring chicken. Everything was checked and re-checked?
Do I now assume that I can disconnect the suction pump and it will not throw out a error. I tried blocking the suction pump vacuum line with melted wax and it threw out an EPC Engine Electronics error until I allowed the pump to suck again.
You took the bait. All those saps that thought they were accomplishing something,actually accomplished nothing,except screwing up their wiring and falsely thinking they fooled the ECU---FYI the EGR only functions when the engine coolant temp is below running conditions-----what do you really gain????
You took the bait. All those saps that thought they were accomplishing something,actually accomplished nothing,except screwing up their wiring and falsely thinking they fooled the ECU---FYI the EGR only functions when the engine coolant temp is below running conditions-----what do you really gain????
So not even using the MOD that uses two resistors and the diode works? Surley it's not all a big load of rubbis? The logic makes sense... There are commercially made boxes that are made for this too. This has had so much coverage over a few forums and they all seem to agree that it works... Are you just a natural sceptic or is this the words of a very wise person? The EGR recirculates all the time, thats the problem... It can get stuck open any time and has. Even on a long journey. with a properly working thermostat the coolant is hovering around the engine temperature anyway isn't it?
Hey Biff this is the W210 forum and although open to posting all sorts of helpful hints, misinformation and HS sometimes creeps in----go back to the original post and follow the OP's directions,but don't start whining if you have problems with your 19 year old rust bucket----ever think of starting to save for a newer car!
Hey, I must have noticed this a while back as the post above are mine and I nearly replied to one of my own. Just to be sure, the reason a run my 20 year old NOT RUST BUCKET as it is probably the best example in the UK, is beucase it is also smoother than any new car and is a complete pleasure to drive. It can be worked on, and things mended/serviced and put back on. Its a very environmentally sound car as it doesn't have disposable parts.. I choose to drive it daily... It so reliable its never let me down and this is the second one of these I've had... I've had many a car in my time including a 1967 mustang. I prefer this type. And yeah, it's got acres of wood and room.
I tried this, didn't work and may hitherto unidentified deleterious effects. I would bother plus it is important to have the EGR for emissions for a UK MOT. The only test Mercedes do is put a vacuum line on the EGR. Once opened, if it snaps shut, that is good enough for Mercedes so it is good enough for me.
Chris
04-10-2015, 10:41 AM
I am interested on getting the mod, but I need to see the image to know if it will work on my OM603 turbo.
strato80@orange.fr
