Skip the auto shop - Our mechanics make house calls

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.

A: Spark wires and boots do age, get damaged a...

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Rattling Noise coming from the Fan behind the radiator

The cooling fan clutch failure is a common problem with the B5 chassis A4 and VW Passat. When replacing the fan clutch, inspect the fan blade for any cracks as well. If any area of the blade looks suspect, replace...

Q: Backup battery problem - 2002 Honda Accord

Hello. If your car's power windows and clock are not working, then the first thing I would check are the fuses. It may be possible that the fuses for these accessories may have burned out and need to be replaced....

Q: Battery Light comes on and off

Hi there. Although it's nearly impossible to diagnose an electrical issue without physically inspecting the vehicle, it appears from here that you might have an exposed wire that is constantly drawing a current; which can cause serious damage to components...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...