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| Mercedes 190E, W201, 1986; Engine suddently stop running | |
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| Tweet Topic Started: Sat Jul 22, 2006 9:09 pm (2,992 Views) | |
| Kjeld Nielsen | Sat Jul 22, 2006 9:09 pm Post #1 |
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Newbie
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Hi, my name is Kjeld and I'm from Copenhagen, Denmark. Please forgive my English - hope you can read and understand it. I'm the happy owner of a 190E (petrol) since 6 year, in the beginning of this year I had several incident where the car (engine) while driving suddently stop runnig, after a few minutes I could start again, this happend as mentioned several times, e.g. one morning driving to my job it stops twice on the highway, then nothing happend for the next two weeks, then again and soforth. I' going mad and don't know where to start, of course I could send it to the workshop but first of all it will cost a fortune and second I'm not sure they will be able to find the error since it only appear from time to time. I have the suspecion that it could be a relay but not sure which one. I have replaced the ignition module a while ago and it seems to have had some effect, however I still experience some "misfire" and the engine is not starting as willing as it used to. The fuel pump is running when ignition is on so I think we can look apart from that. I was stumbling over this forum and read with interest the many good answers to MOOTANG question in another tread and hope therefore that some of you might be able to help me, even with some guidence. Additional questions: What is the OVP relay? I have a relay in the engine room, on the top it say "kick-down", does it have any relation to the ignition and or fuel pump? There is also a BIG black box with a thick cable next to the "kick-down" relay, what is the function of that (look expensive) By the way, I just had a contact with an other Danish guy who had the same problem so it seems it could be a common problem and somebody must know the answer. Looking forward to hearing from some of you. Kind regards, Kjeld kjeld.j@nielsen.tdcadsl.dk |
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| mr_s | Sat Jul 22, 2006 9:25 pm Post #2 |
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More than part of things
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The OVP relay is a small silver relay with a red top, with either one or two 10 Amp fuses in it. If your ABS (Anti-Lock Braking System) light is on on the dashboard, then there is a good chance that the fuse/s in the top of the relay are blown, or the relay ir broken. On our RHD cars, the relay is behind a plastic panel behind the battery (you'll have to remove the battery and the plastic panel to reach it). It is next to the Fuel Pump relay. The 'Kickdown' relay probably has something to do with the kickdown on your automatic transmission (when you put your foot to the floor on the accelerator and it drops into a lower gear for better accelleration). I can't be 100% sure, as I have a manual transmission. Hope this helps! |
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| brummie | Sun Jul 23, 2006 1:03 am Post #3 |
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Part of things
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hi there not to much of an machanic myself,so this could well not be the answer,but i did have a problem just like yours,and it was the fuel pump,but you reckon yours is fine,so im not sure. my car kept cutting out,like yours,but one day it cut out completly,and it was the fuel pump and filter that was corsing the problem. Have you checked the condition of the fuel pump and filter ? in a way it my be a long shot,but sometimes it pays to narrow things down |
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| Kjeld Nielsen | Sun Jul 23, 2006 11:08 pm Post #4 |
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Newbie
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Thanks to Mr. S for kind reply - now one additional question - what does the OVP due, is it for the fuel pump? I don't have ABS (unfortunately) What is "RHD Cars", sorry for stupid question but I don't know. My question regarding the Kickdown relay was more a question about whether there could be some relation to the fuel pump and fuel pump relay. Once again thanks for support. Kjeld |
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| Kjeld Nielsen | Sun Jul 23, 2006 11:12 pm Post #5 |
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Newbie
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Thanks to Brummie, I really appreciate all replies and as you say it could narrow it down. I will check the fuel pump and filter. Regards, Kjeld |
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| Matt | Sun Jul 23, 2006 11:59 pm Post #6 |
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Administrator - Hawk Eye
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The OVP relay stands for 'Over Voltage Protection' Relay. does what it says. Prevents over voltage of power. RHD Cars means 'Right Hand Drive' Cars Not too sure about the Kickdown relay, as you would imagine it would be to do with the Auto transmission, but on my old 2 litre carb engine I had a relay with 'Kickdown' written on it but I had manual transmission and it had manual transmission since the factory made the car. So I never did find out what the kickdown relay did.
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| pentoman | Mon Jul 24, 2006 9:23 am Post #7 |
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Resident OVP Expert
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The OVP relay protects some of the electrics from being 'spiked' with a high voltage and breaking. It is not your problem - take out the OVP relay and the car will still drive!!!!! Your problem (and it's hard to guess over the internet!) may well be the fuel pump relay. It is a very common problem. If I remember correctly, it is the one with kickdown written on it. It is between the size of a matchbox and a cigarette packet. When you switch the ignition on, you will hear a click at the front of the car, and hear the fuel pump buzz at the back. Then there's a click and the fuel pump stops buzzing. This is the fuel pump relay controlling this. Get used to it - it happens every time you turn the ignition on. Next time the car stops and will not start, listen for the click and buzz. If there is no click, the problem is the fuel pump relay, if there is a click but no buzz, the problem is probably something to do with the fuel pump. The fuel pump relay is a very common problem so everybody get used to the sound of it clicking in! |
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| Kjeld Nielsen | Mon Jul 24, 2006 9:52 pm Post #8 |
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Newbie
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Thanks to Pentoman for very helpfull reply. I will listen to the sound fra relay next time the car die, funny, I did'nt think about two sounds (a click and a buzz), very good info. With regards, Kjeld |
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| merc190uk | Tue Jul 25, 2006 12:13 am Post #9 |
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The Godfather
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if it is the relay it can be repaired if you can solder. dry joint on one of the switches.
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| Malayoldman | Tue Mar 22, 2011 9:03 am Post #10 |
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Newbie
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Hello to all members...I look through google to find out almost similar problem...but what puzzle me most is that,the engine stop on steering a corner and also at traffic light but the engine can restart immediately without failed when it happened once.I have change oil filter,fuel relay,overload really and also cleaning the fuel injection system..but it is still happening at odds time..which scare me for a long drive to heavy traffic areas.Can anyone advise me .Thank you. |
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and it had manual transmission since the factory made the car. So I never did find out what the kickdown relay did.


3:54 PM Jul 11