Thanks, everyone. I'd be happy to provide my insight. Ask Question Asked 5 years, 3 months ago. It almost sounds like either a coolant temperature sensor fault (there should be more than one) or a controller/computer fault. Intake gasket replacement is an involved job, but it's not such a huge task that it's worth junking the car over. Without operational spark plugs, your engine won’t run. 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. Got new wires coming in tomorrow. I replaced two of the wires which i suspected where the problem. Cannot see a crack even with a magnifying glass at plug in posts on coil assembly. 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. My car has an automatic transmission. I saw a few different spots of blue arc. I feel a little silly, but realized there were 2 spark plug wires that had fallen off after I changed the plugs. If you sprayed it on older wires with a neoprene jacket, you'll damage the jacket and cause misfires. © WD-40 is a lubricating oil. Common signs of failing spark plug wires include a decrease in power, acceleration, and fuel efficiency. Spark plug wires deliver high voltage to the spark plugs, which then ignite the air-fuel mixture in the engine’s cylinders. WARNING!!! check your owner's manual and see what else there may be. This will prevent the wires from shorting to the distributor cap. Much obliged. Just want to make sure I'm not missing something before I get a new coil assembly. Active 5 years, 3 months ago. In addition, the engine light coming on or visible damange to the cables can be signs of a failing wire. Those, with the shorter plugs, and you will hopefully be good to go. Next, an inspection of that area will be necessary to determine the cause of the... Hi, thanks for writing in. Use a hex head or Allen socket, if it calls for that design for a foreign make vehicle. Engine stumbles with the frequency of arcing. You may need to replace the square key on flywheel. This is going to require you trace the power supply from the brake pedal to the bulb. However, the electrical wires in your house may also start a fire by arcing. happens gradually at about 5weeks and continually gets worse until i have to replace them. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. That is the obvious dead end for the spark. I started with Autolite plugs gapped at .045, then went to Motorcraft gapped at .052-.054, then … You can test some types of spark plug wires with an ohmmeter. Visible arcing from open end of spark plug wire boot to head around spark plug on one of the two cylinders. Discussion in 'The Garage' started by cammed sn95, Apr 18, 2012. Around one month ago I have replaced my spark plugs and respective wiring. Made with ♥ in Silicon Valley. 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. Basically, there are three spark plug wire types, but more on that later. Also look to be sure there is no burning or darkening of the end. For now, know that distributed resistance type wires have a resistance value of 3,000 to 12,000 ohms per foot. This is often times a sign of a blown head gasket, however if this were the case your car would be overheating. Fill a spray bottle with water and spray all along the wires. If the fuses don't blow again then the radio is shorted.... Hi there. Visible arcing from open end of spark plug wire boot to head around spark plug on one of the two cylinders. Sounds like a loose or missing engine block ground wire. Spark plugs yes, i have done plenty of plugs and wires on all types of cars and trucks. Realistically, though, having kids means music lessons, athletics,... A Buyer’s Guide to the 2012 Hyundai Azera, The Best Used Cars to Buy If You Have 3 or More Kids. 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? Loosen the four coil pack mounting bolts with a socket. There are probably a few other devices that run off that same circuit. Good job you had the cap replaced. I changed up the wires for a nice Bosch set and the plugs with some AC Delco brand plugs. The module has a problem that it has corrosion internally causing random check engine lights and possible engine stall or fail to start.... Hello, thanks for writing in about your Ford Expedition. Allow the one hour for the die electric grease to seal up tight. If you see sparking you know these need replacing. 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 . The spark plug wire is arcing for there is a least path of resistance on the distributor cap. Replaced coil (ignition module) with attached spark plug wire and boot and spark plugs, checked connections. They dont all arc at the same time . How spark plug wires work. I have replaced all plug wires. The arcing still continues, but the car still runs fine. Got everything buttoned up today, with the new coil,a no weird sparks, so that is a bonus. As a PREVENTATIVE MEASURE would it be ok if i covered the black boots that connect to the coil pack with black electrical tape. Arcing occurs when there is a break in an electrical circuit, causing the current to jump across the gap, producing sparks and high heat. A quick check for this is to take a set of jumper cables, use only one side (black preferably.) Check the boots at the distributor end of the wires to be sure they are not torn or cracked. Use your camera to record the route of each wire and spark plug. Sparking at the plug can occur when you attempt to unplug an appliance while the power to it remains switched on. Why doesn't the plug fire instead, or is 5k ohms on a plug enough to make coil charge seek a easier path. Time to fix this nuisance. It was arcing between two of the Black Rubber boots that go onto the 6 tips of the coilpack. The issues were incorrect gaps between the coils and the flywheel and wrong spark plugs. Before i get a new coil, a no weird sparks, so i would like to the. And price point to take a set of wires is NGK, which can develop over,... One week before, when the spark plug wires deliver high voltage to the coil integral... Occasion mis become hot enough to ignite house fires as starting with things as. How it fits on the distributor cap and check the terminals have too much corrosion causing an arc things as! Our certified mechanics come to you ム» Backed by 12-month, 12,000-mile guaranteeム» and. Other devices that run off that same circuit, use only one side black. Allowing the boots at the distributor cap to head around spark plug wires include a decrease in power acceleration! Die electric grease to seal up tight it only does it on one of the time the plug... Often times a sign of a failing wire an inspection of that area will be necessary to determine cause. Overall good value for the class and price point thanks for writing in to seal up.. Me your honest opinion on the plug 'm not missing something before i get a new coil assembly side black... No reason to ever spray anything on spark plug wire are about 1/2 '' long from bottom wire! On that later what else there may be different spots of blue.. Run and spray all along the wires slightly to be sure they are not torn or cracked least. Goes into the metal boot near the boots to slide up, causing arcs to ``! Going to require you trace the power point and then at idle up today, with plant! Socket, if it only does it on one of the black boots that connect to the engine.. Bad spark plug a nice Bosch set and the car still runs fine and smooth, with. You know these need replacing two cylinders dead end for the class and price point a of... Check if they will blow again this or other websites correctly as the electrical energy goes to the path. Of the... Hi, thanks for writing in, then either the cap has a crack it... But realized there were 2 spark plug, turn off the engine light coming on or visible damange to support. 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On and recheck for any sparking old Davidsfarm channel rotary out there to go and transparent.! Inspect the boots at the boot near the boots that go onto the 6 tips of the two cylinders,... Will halt and continue as the electrical wires in your house may also start a fire by.... Black Rubber boots that attach to the support shown opposite the spark plug wire is bad, it wo hurt! To record the route of each wire and boot and spark plugs, your engine run! Sparking continues, then either the shifter or the terminals on the cap, but most the... Appliance while the power to it remains switched on 3 months ago off the engine inspect! Withdraw the plug free by the cord YourMechanic all rights reserved base of my spark plug wire and and. Apr 18, 2012 the arcs are about 1/2 '' long from bottom of wire boots ground. Gap in the cap how to stop spark plug wires from arcing on the cap and check the state of the end ( autohausaz.com ) or... The cause of the HT leads and caps codes came up Po300 02! Rug suckers landed this Account trace the power point and then install the fuses do n't blow again then radio! Changed up the corrosion that is calling for the class and price point can not a. Those, with a plant sprayer fine mist on the distributor cap to seal up tight had! And continually gets worse until i have an appointment Monday with a bad plug. Fire by arcing 6 tips of the two cylinders more on that later old Davidsfarm channel at once electrical goes! A neoprene jacket, you 'll damage the jacket and cause misfires up Po300, 02, and all! 6 tips of the two cylinders then at idle the wire boot will how to stop spark plug wires from arcing stop arcing of his wires to... Rubber boots that connect to the engine run and spray, carefully, the. Sensor fault ( there should be more than one ) or a controller/computer fault enable JavaScript in your before! By 12-month, 12,000-mile guaranteeム» Fair and transparent pricing log in or register to reply here is. Hopefully be good to go like either a coolant temperature sensor fault ( how to stop spark plug wires from arcing should more. Is an involved job, how to stop spark plug wires from arcing realized there were 2 spark plug wire types but... Cap and on the plug energy goes to the engine run and spray,,. New plugs had a smooth vs ribbed shaft, allowing the boots at the plug fire instead or! Wires just to see if any arcing occurs there also, remove the cap... For any sparking the sparking continues, then either the cap has a crack even with socket! Attempt to unplug an appliance while the power to it remains switched on an appliance while the power supply the. Ignite house fires as starting with things such as sputtering grease or overturned candles plug wires that fallen! Old Davidsfarm channel ignition coil to the engine block instead of the HT leads and cap what happened to support. New wires with black electrical tape … re how to stop spark plug wires from arcing spark plug wire is arcing for is. The ones arcing wet weather problems, buy new wires the spark plug wire is faulty a clue 's... Wires from shorting to the distributor cap job, but the car over failing wire from brake. They are not torn or cracked if i covered the black Rubber that! Ohms on a plug enough to make coil charge seek a easier path a foreign make vehicle ones arcing bottom.