hi so i got new problem the merc is misfiring and and making a popping sound ill put a video clips here
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misfiring and poping sound
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How old are the distributor caps / rotors, and have you removed them to check for moisture when the misfire occurs? And, have you added more ventilation slots in the caps to help with the moisture issue?
More info here:
More info here:
FYI - Essential M119 Ignition "Tune Up" mods [Distributor cap vent / slot] | M119 Engine
Hi all, I have been meaning to address this on my little used 500E for years.... it is a problem I myself recognised about 5 years ago when I first looked at an m119 distributer cap..... Compare to any other distributor cap of the era such as an m104 and you will see there are NO ventilation...
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i cleaned them they worked ok for 6months
Yeah, you'll need to do more diagnosis. If there's an oil leak in that area - including just a trace of oil at the bottom edge of the cap - this may cause problems.
In the meantime, clean & dry them again, but this time add the vent slots as shown in the thread linked above.
well thats the thing i did there is somthing else wrong
my place does not have any moisture so besides that what else could cause this misfire and popping sounds
Did it just start acting like this out of the blue? Like Dave said, I would check the caps and rotors but it sounds like maybe you have a failure of one of the ignition components (rotor?).
I once inadvertently crossed plug wires after changing rotors and caps and it acted like this. You pointed to the driver's side bank and said it was #3 or #4 that's misfiring. Numbers 3 and 4 are on the passenger side. It goes from the piston closest to the driver is the highest (#8), then forward on the bank to numbers 7, 6, and 5. The piston closest to the passenger is #4 and forward from that is 3, 2 and 1. Hopefully it's something that simple. BTDT.
Attached is a crude drawing that helps when installing plug wires.
I once inadvertently crossed plug wires after changing rotors and caps and it acted like this. You pointed to the driver's side bank and said it was #3 or #4 that's misfiring. Numbers 3 and 4 are on the passenger side. It goes from the piston closest to the driver is the highest (#8), then forward on the bank to numbers 7, 6, and 5. The piston closest to the passenger is #4 and forward from that is 3, 2 and 1. Hopefully it's something that simple. BTDT.
Attached is a crude drawing that helps when installing plug wires.
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no slowly it started first it was the idle starting to jump then it gas was delayed then fuel regulater left chat then that happened.
i need to check 6 and 7 but first need to order the right tool for it
Last year a Bosch cap or rotor got progressively worse on me over a one-month period until it seemed to be running on four cylinders. Since I had a new set on the shelf I replaced both caps and rotors. The insulators were good. That completely fixed the problem. I still don’t know what failed. I saved the old parts.
bro my caps are the one that came with the car from 1995
uh... well... might be time to start there. Can you post photos of the insides of the caps on the car now?
Cut additional vent slots in the new caps. New rotors would be a good idea only. Genuine / OE, or Bosch only. Not Bremi, not Facet.
sorry for the delay here is the pic
Just curious: do you see any hairline cracks in the caps, maybe looking with a magnifying glass? Here are the bad caps/rotors that caused problems for me. It started out as a gradual misfire and by the time I decided to install new caps and rotors it felt like it was running on four cylinders. I still don't know why the new parts did the trick. All I can see are tiny hairline cracks on each cap. Whether that caused the problem I don't know. If those really are original caps and rotors on your car then you should change them even if they're not causing your problem. Buy them before they stop making them because I think that day is coming.
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i didnt i will
My E420 w210 has the same sound, did you manage to solve your problem ?
I'm sending you the youtube link
did you find the probelm
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