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carbon (Slept 3 nights,(on vac 30 day)\ answer 1 wire at a time. or it cross fires. my guess is you meant changing carbon core HV spark wires, but the plug wells are like oil pits. (flooded) SUPER COMMON.
get he MAG wires and win.! max life and better spark!!!
all G16b do this seen 100s and all C.O.P engines. 1 cause owners did not do full 60k mile tuneup per operators guide, lost it have it ask. the valve lash step, demands a new valve cover gasket set. if not it will fAIL, it will,like pissn on a sparkplug bam. like texas talk, i do...sorry
and a cam belt.. forgot that too? that is fail 2 , in the woods, or like train light in the tunnel.
not one of those parts last the life of engine the real reasons tuneups were invented and why planes dont crash (of ddumbb things like this)
tuneups on this engine, only make long walk home on other engines, most DOHC. boom head valves bent or far far worse.
A great deal is sprouted about additives that clean valves and pistons and heads but unfortunately there are none worth the money. Especially now that lead has been removed from the petrol as there is no contaminant that builds up in the combustion chamber. Plugs will indicate if rich or if there is an oil burning problem and the CPU does it's best to keep the air/fuel mixture exact to prevent problems.. If you know that there is a serious buid up then a head job is the answer.
Is the porcelain "cracking" or are they getting "carbon-tracked"? (see example photo of carbon-tracked plug below). It is common for carbon-tracking to occur if your original plugs were carbon-tracked and you replace the plugs without replacing the wires. If the plug is carbon-tracked, the boots on the wires or the coil boots (coil-on-plug ignition) are also carbon-tracked. If you do not replace the wires or the coil boots, the ignition will still misfire by following the carbon-track on the inside of the boot. This will cause your new plugs to also be carbon-tracked within a short period of time (days or weeks).
There is no reason I can think of for the porcelain itself to actually crack other than faulty installation techniques or possibly, cold liquids getting poured on extremely hot plugs.
Do a test for spark at the plugs. Remove one of the plug
wires from a plug and hold it near grounded metal. (If the plug end
has a long insulated shroud, you may have to improvise to get ground close
enough to the end of the wire.) Have someone crank the engine while
you watch for spark. If you get an 1/8" or so of spark, that should
be enough to fire.Check the distributor cap inside for signs of cracks or carbon arc tracks.Also, check to see that the little carbon contact for the center terminal
is in place; without that you can have spark but it won't get to any plug
wires.It's rare, but a rotor with an internal short or carbon tracks on the surface
can kill the spark before it even gets to the cap.
Carbon build up comes from rich mixture or weak ignition. This will cause misfiring, hesitation and hard starting. To fix the problem, change the plugs and use a plug that will produce a higher heat range. Which means it has a hotter firing/ignition when combustion. This will burn the excess gas that causes the carbon. Be sure to check the plug wires to make sure you don't have spark jumping. (check at night with engine running). Also be sure the air filter is clean.
The only way to deal with high compression due to carbon is with premium gas. You don't want to actually take the head off and clean it, because it is too expansive and not worth it. The carbon will burn off as long as you don't keep adding more from additional pre-ignition. And premium will stop that.
Assuming the engine timing is'nt the problem; you may have a fouled spark plug, bad spark plug wire, or excessive carbon build-up on the valves and pistons etc. Make sure all fluid levels are where they should be. Try replacing the spark plugs and wires. Look in your operator's manual in the specs sections and make sure the spark plugs that are installed are gapped properly. Improperly gapped spark plugs or split-fire ( can't be gapped) spark plugs are known to cause engine issues. Make sure to use dielectric grease when connecting the spark plug boots to the spark plugs; and the wires to the distributor. Also run a couple bottles of fuel system or injector cleaner and water remover through several tanks of gas to remove any possible excessive carbon build-up. Hope this helps. God bless!
it sounds right, it is called a light load miss. it occurs mostly at 45-50 mph on slight incline and it feels like a bucking or hesitation. It commonly ocurs when there is carbon tracking on a spark plug porcelin (sp) . note . if the porcelin has carbon tracking so does the plug wire boot. the spark will travel through the carbon track in teh boot after plug replacement causing premature failure of the plug. it is a good idea to replace plugs and wires if this is the cause of your miss.