Q: spark plug arcing at boot

asked by on

Car was missing, eventually stalling and check engine light on.. Towed to garage. Was told spark plug wasnt put back in the whole way after a heater hose that split 2 days before was fixed. (?). Drove it next day and after 10 miles of highway driving got off at exit it started missing and check engine light on. Barely got it to Auto Zone and diagnostic was #2 spark plug misfire. Bought a new plug and it did the same thing. The guy that helped me said it was arcing on the spark plug boot. After being picked up tow truck driver who also owns a garage he said he would tow it to his place which was closer to save AAA towing fee and take a look. Distributor cap was dry. So he saw a small defect in the SP boot where it was arcing and "McGuyvered" it by melting the defected part and patching it with more rubber. seems to have worked so far.. drove about 15 miles My question is have you ever heard of this and do you think it will hold

My car has 143000 miles.
My car has an automatic transmission.

Spark wires and boots do age, get damaged and otherwise fail. An accompanying symptom can be the arcing your describe, or voltage leakages, which simply means that the energy that was supposed to go toward firing the plug gets diverted. That "loss" is what causes the spark plug to misfire, of course then causing the check engine light to illuminate. All of the plug wires should be replaced, as a set, with new wires that are a reputable brand and preferably Honda OEM. There is no such thing as an acceptable, in the field, "repair" to a spark wire, even if the wire "appears" to be presently working. Spark plug wires carry 10,000 volts or more and consequently have to be in perfect, undamaged condition in order to both function as intended and also be safe to handle. If you would like to schedule replacement of the spark plug wires, a certified Mechanic from YourMechanic can do that during a mobile visit to your home or office. If the spark plugs themselves have high mileage (i.e., outside of Honda recommended service interval), deposits, or damage the plugs should be replaced as well.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. spark plug arcing at boot

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: No spark to coil pack or wires

Hello. The problem is most likely the engine crank sensor or CKP for short. The CKP measures engine speed and notifies the engine's computer when the engine is at #1 cylinder top dead center so it knows when to fire...

Q: Erratic shifting

Hello. It would appear that these 2 problems may perhaps need to be addressed separately. If these problems began after you replaced a sensor, then it may be possible that the problems are related to the repair. I would recommend...

Q: My car is idling at 500 rpms is that normal? It's sounds like it's about to shut off but it doesn't

Hello. A low idle can be caused by a few different things. Before doing anything, I'd start by checking the computer for codes. This would tell me if the computer is seeing anything that is not correct. If there are...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.