Q: Arcing from distributor to valve cover

asked by on

Ok I'm sick of buying new parts nothing seems to fix a slight miss on my 22re at night I see arc happening from base of distributor to valve cover and if I touch the plug wires it arcs to my hand??? Everything is new cap rotor plugs wires ??? No visible cracks in coil or igniter they are not new but switched out it still is arcing from distributor to valve cover also my pick up in distributor is new as well

My car has 110000 miles.
My car has a manual transmission.

The coil is the only thing that is putting out high voltage. The ignition spark will always look for the quickest path to ground. This is the way electricity works. If you are getting spark jumping to the ground before it wants to jump across the gap of a spark plug, then you will have to look at two things.

First, remove the spark plug wires and inspect them to make sure there is no oil on them from a valve cover leak. Then remove the plugs and make sure the plug gap is set to .031 inches or .80mm. If the gap is too big, this will cause the problem you have. If the plug gap is correct, then make sure they are the correct plug for your engine. They should be NGK BKR5EY or equal plugs.

If the plugs are correct and the gap is okay, and you still have the issue, then you need to have the injection system checked to see if it is running too lean perhaps due to clogged injectors or vacuum leaks. I would also recommend putting dielectric lube at all plug wire connections and on the coil and rotor buttons. This will keep a better contact and less stray arching. Look for any signs of the coil cracked as it will show as a grey or black marks on the coil surface.

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. Arcing from distributor to valve cover

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: Weird helicopter noise while braking - 2012 Toyota Corolla

Hello. Based on the symptoms you are experiencing, I would first recommend having your vehicle inspected by a qualified mechanic to determine if your brakes and suspension components are performing properly. If your steering wheel is shaking when you...

Q: Started my car and it immediately went to full throttle

Hey there. You need to check to make sure nothing is holding the gas pedal down. Also make sure that you did not cause the cable to hold open the throttle in any way in the engine compartment. If you...

Q: just had a clutch kit put in hearing throwout bearing

Hi there. From the description you have provided, you have a warrantable problem with the throw-out bearing, given the clutch kit was installed a day ago. It could be, something was installed incorrectly. It could be, the throw-out bearing was...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...