M103 Please help!
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Newbie
Joined: May 2007
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From: Spokane, WA (Seattle's Redheaded stepchild)
1987 190D 2.5
M103 Please help!
Can anyone tell me what position is #1 on a M103 distributor cap please?
I know the firing order but, I can't figure out how the wires go on the cap. I have tried searching this forum for quite a long time and the mercedesshopforum as well... Please, someone go out to their 300E and tell me which terminal on the distributor the #1 wire goes on.
I know the firing order but, I can't figure out how the wires go on the cap. I have tried searching this forum for quite a long time and the mercedesshopforum as well... Please, someone go out to their 300E and tell me which terminal on the distributor the #1 wire goes on.
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
looking at the
engine straight on trace a line from the oil cap to the upper part of the distributer with your finger.If the oil cap handle is inline with the engine as it should be the line you imagined will end up between the top two plug wire towers on the dist cap.The one on the right side of that line is plug 1 to cylinder 1 in the firing order.The shortest wire.
Thread Starter
Newbie
Joined: May 2007
Posts: 10
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From: Spokane, WA (Seattle's Redheaded stepchild)
1987 190D 2.5
Thanks for the info, got it figured out, the car ran great but....
The old problem resurfaced, when it gets warm (not at a specific coolant temp but maybe egt) it runs really poorly and dies... WTF!
The old problem resurfaced, when it gets warm (not at a specific coolant temp but maybe egt) it runs really poorly and dies... WTF!
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MBWorld Fanatic!
Joined: Apr 2007
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
ovp
engine coolant temp sensor check both.
Any blinks on your blink box?
Have you ever replaced the o2 sensor?
To the poster above giving instructions on firing order I hope for sure he learns number 1 cylinder is number 1 in the firing order of 153624
reading something as convoluted as he posted could lead some newb down a path of misfire that would not be fun.
Any blinks on your blink box?
Have you ever replaced the o2 sensor?
To the poster above giving instructions on firing order I hope for sure he learns number 1 cylinder is number 1 in the firing order of 153624
reading something as convoluted as he posted could lead some newb down a path of misfire that would not be fun.
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MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Wow
A buddy is putting all the sheet metal and the engine of a 500E into a 1994 w124 wagon. But a 55 into a 500e I hope he got the whole donor car. He will need all the running gear from engine harness ignition trans ecu tcu sensors.
At least he is keeping it in the family and not sticking in a 2JZ
At least he is keeping it in the family and not sticking in a 2JZ
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Joined: Dec 2009
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From: bristol,ct
1990 300e 124.030
The firing order your giving is corect but, looking clockwise at the cap #6 is the first terminal starting at the 8:00 o'clock position so knowing the first term # the rest is simple. knowing where any one position is you can figure the rest w/ the firing order.
8 o'clock is a good place to start with that kind of cap design.
8 o'clock is a good place to start with that kind of cap design.
Thread Starter
Newbie
Joined: May 2007
Posts: 10
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From: Spokane, WA (Seattle's Redheaded stepchild)
1987 190D 2.5
Thanks, the firing order is all correct, no need to worry I just needed to know where to start putting on wires... But more importantly, my car doesn't have a LED on the blink box, so I would have to make a tool, also I was told by a trusted source that my symptoms are indicative of crank position sensor failure. I am also considering the OVP, is there a way to test either of these?
Newbie
Joined: Dec 2009
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From: bristol,ct
1990 300e 124.030
Issues with the ovp relay, It is behind the battery. It has either one or two fuses on the top. take it out, take the cover off and look at all the terminal solder connections for loose or broken leads.The crankshaft sensor will be an open circuit if good,flex the base of the wire from sensor to see if you have any change in your readingsif so it is shorting to ground and needs to be replaced. good luck
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Joined: Nov 2003
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From: Tennessee
1988 Mercedes 300SEL, 1991 Lexus LS400, 1972 Chevrolet Kingswood Estate, 1973 Pontiac Grand Ville
Is there any way to test the crank position sensor and where is it located on a M103 (W126)?
Thanks
Thanks
