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Basically, I am not a miracle product believer
but today I tried out SeaFoam
the engine runs like hell after using this, cleaning most carbon and also cleaning your spark plugs
it seems that carbon deposit in the cylinders also makes your ignition worse
so it is easy to do
this is a 12 cylinder, so 4x bigger as a 4 cyl,
get 2 cans of SeaFoam
engine HOT
1500-2000 rpm
connect your seafoam here
just hold the hose close enough to suck up the seafoam and that then engine doesn't stop
around 75% of the bottle, the exhaust while smoke a lot, some smoke in the engine too, don't worry
more smoke, better is
Stop the engine quickly, wait 15-20 minutes
run the engine until nearly no smoke anymore
repeat this 3 times
then drive your car hard up to 5000-6000 rpm
you don't need to drive fast, use the manual gear selection
you will be surprised how your engine runs like new
this might also solve some low ignition faults
to clean injectors, drop a can of seafoam in your gastank
see manual for how much
(I prefer manual cleaning)
They say you can use this in oil too but that scares me on a bi-turbo V12
This morning I started up and didn't wait for engine warmup
drove quite fast, not crazy
engine light went on
and wow, for the first time I had a Xentry Das message targeting the spark plugs
allways had missfire messages only
conclusion, now that the cylinders are cleaned up, Xentry Das can identify the problem more accurately
So, after all these long testings with repaired, professionally repaired and now new coil packs, if you have misfire problem
before you replace your coil pack as even if you replaced your sparkplugs first, drive only a 500 miles with ignition problems, can mess up your spark plugs
do this first:
1) clean up your injectors. seafoam or other product in gas
2) seafoam your cylinders x3 (2 cans) as above
3) replace your spark plugs
4) verify the the red isolators are dirty or bad / replace them
then connect Xentry Das and look
this way you might avoid paying for new coilpacks
remember, if the whole left or the whole right if bad, then you might have a Ignition voltage transformer problem.
you can check this easily by opening the device
mostly, nothing burned inside, no dark silicone, device is good
here the Xentry message I got before replacing spark plugs 11 A and B
hope this helps some of you
don't forget the thx button
confirmation from SeaFoam:
Maintenance Tips: • Treatment method can be repeated as often as needed • Apply this cleaning method at least 1 or 2 times per year
I have asked you for the purchase information of coil packs in another thread over here as my 2008 W221 S600 has a slight misfire sometimes (not all the time).
Now the only thing i realise is that my misfire is related to the outside temperature. The colder it is, the rougher the misfire.
It usually misfires for the first few minutes and then corrects itself. Runs pretty good after that.
However, on one particular occasion, when it was really cold and i had not started the car for 3 days it misifred quite badly. So much so that it caused the CEL to come on, something that had not happened over the previous 4 misfiriing occasions. I had it read on a SnapOn machine and that gave fault codes that said misfires from Cylinders 1 through to 6.
As mine is a temperature related fault - should i still try SeaFoam or should i just replace the coil pack?
My fear is that i could replace the coil pack only for it to be the Ignition Voltage Transformer, as the fault codes are for 6 cylinders, not just 1.
I have asked you for the purchase information of coil packs in another thread over here as my 2008 W221 S600 has a slight misfire sometimes (not all the time).
Now the only thing i realise is that my misfire is related to the outside temperature. The colder it is, the rougher the misfire.
It usually misfires for the first few minutes and then corrects itself. Runs pretty good after that.
However, on one particular occasion, when it was really cold and i had not started the car for 3 days it misifred quite badly. So much so that it caused the CEL to come on, something that had not happened over the previous 4 misfiriing occasions. I had it read on a SnapOn machine and that gave fault codes that said misfires from Cylinders 1 through to 6.
As mine is a temperature related fault - should i still try SeaFoam or should i just replace the coil pack?
My fear is that i could replace the coil pack only for it to be the Ignition Voltage Transformer, as the fault codes are for 6 cylinders, not just 1.
Any ideas?
Thanks
before even seafoaming, did you check the red insulators and spark plugs on the coil pack passenger side ? check those first sea foam doesn't repair spark plugs, but helps cleaning only
then, you could open the voltage transformer, look inside, the components are covered with transparent silicone stuff. that should all be clear, if any burning or dark on one side, that could be damaged
if it's the whole side, you probably have the coil pack ending his life, or the half transformer
try and find someone with Xentry Das, or get one from aliexpress, you will have more accurate codes
03-12-2018, 02:35 PM
SeaFoam carbon cleanup
