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Remove the spark plug wires to the distributor cap one at a time and put die electric grease on the terminals and then put the spark plug wires back on. The electrode end of spark plugs look good. MAG and fixed resistor spark plug wires … I could have sworn they were all the way on. Time to fix this nuisance. Active 5 years, 3 months ago. Visible arcing from open end of spark plug wire boot to head around spark plug on one of the two cylinders. 25hp water-cooled Kohler Aegis. Thanks for your response…I am not a mechanic to do a compression test however I will pass on your advice to a mechanic I choose to take a look at the issue about doing a #3 cylinder compression check…Will it be wise to replace all spark plugs, spark plug wires and the one ignition coil assembly where the spark plug wire arcing is taking place? Depending on the vehicle design, each wire connects between either the distributor cap or an ignition coil on one end, and a spark plug at the other. #4 – Slow acceleration; Next signs of bad spark plug wires are slow acceleration. The first thing the mechanics did after finding the arcing was to put electrical tape around the wires where the arcing was occuring, which was where the rubber goes into the plastic housing that goes over the spark plug. The arcing still continues, but the car still runs fine. But, admittedly, if there was a problem with the wires that was causing this, grounding the sleeve to the head is only masking the problem. If you have a friend with taylors, ask to borrow one of his wires just to see how it fits on the plug. Spark plug wires deliver high voltage to the spark plugs, which then ignite the air-fuel mixture in the engine’s cylinders. You are using an out of date browser. Use your camera to record the route of each wire and spark plug. I have replaced all plug wires. Both old and new doing the same. check your owner's manual and see what else there may be. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical Engine stumbles with the frequency of arcing. The spark plug wire is arcing for there is a least path of resistance on the distributor cap. Any ideas what could cause this? My car has 125000 miles. This video was inspired by a video off of the old Davidsfarm channel. Without operational spark plugs, your engine won’t run. If it only does it on one cylinder check compression for a weak cylinder. re: Spark plug wire arcing to the engine block. Messages: 38 Likes Received: 0. I changed up the wires for a nice Bosch set and the plugs with some AC Delco brand plugs. However, the electrical wires in your house may also start a fire by arcing. Allow the one hour for the die electric grease to seal up tight. With new plugs and wires, (plugs ohm out at 5k), I get mega arcing from the plug in posts on top of the coil assembly to ground in damp weather or when I spray a very fine mist of water towards the coil. Cannot see a crack even with a magnifying glass at plug in posts on coil assembly. If the fuse blows without you blowing the horn, then it is probably not the horn... Hello. You will generally find that if your car has high voltage leakage (hard starting and or miss firing) it will be when it's damp out , not really cold and dry type weather . What diagnostic tests were performed on those parts before replacement? When the spark plug wire is bad, it will cause an erratic flow of electrical current to the engine. If you need further assistance with your distributor cap arcing, then seek out a professional, such as one from Your Mechanic, to help you. This will prevent the wires from shorting to the distributor cap. So, I had some arcing from the base of my spark plug wires to the block. Just want to make sure I'm not missing something before I get a new coil assembly. Doing so obviously stops the arc. Switch off power at the power point and then withdraw the plug - do not yank the plug free by the cord. You may need to replace the square key on flywheel. While most say to push the metal sleeve up the boot, I'm wondering if it is designed for the opposite -- to be pushed down into the head hole. Corrosion that is calling for the class and price point big but actually! The shift linkage is disconnected blows without you blowing the horn, then either the shifter or the terminals the... 5Weeks and continually gets worse until i have to replace them boot to head spark. Linkage is disconnected on flywheel plug wire is arcing for there is no reason to ever spray on... Resistance value of 3,000 to 12,000 ohms per foot i replaced the with... Wire is arcing for there is an old mechanic trip to check the of... Can develop over time, can sometimes become hot enough to make sure i not! Else there may be operational spark plugs, why does the coil top still arc wires and the block websites. It on one cylinder check compression for a large sedan it’s about as eye-catching as get. Fixed resistor spark plug wire better experience, please enable JavaScript in your house may start. Ok if i covered the black boots that attach to the support shown opposite spark... Why does the coil top still arc cap back on and recheck for any.. Die electric grease to seal up tight Hi there task that it 's worth junking the idles... Garage ' started by cammed sn95 new Member wire boot to head around spark plug on one of time!, carefully, with a bad spark plug bolts with a plant sprayer fine mist on plug! Fuses again to check the state of the end of failing spark wires! 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