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How fix heating coil

Over heating or burn out

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  • Cars & Trucks Master
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Make and model of vehicle?

heater core will not cause your car to overheat, probably a plugged or defective thermostat. If you are getting steam on the windshield? you have a bad heater core.... if not, then focus in the thermostat, located on the engine block usually attached to the upper radiator hose.

Posted on Apr 02, 2015

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Posted on Jan 02, 2017

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What would cause a coil to burn out on a Mazda Tribute 05 v6


Ignition coils fail due to bad spark plugs or plug wires. Another potential cause is heat and vibration, which can damage the ignition coil's windings and insulation. If an engine is experiencing repeated coil failures, the underlying cause may be resistance from worn spark plugs or excessive spark plug gap. And in rare cases, the failure may be due to a lean fuel condition caused by leaky valves.

With coil on plug (COP) type coils, the rubber insulation dries up (over time and heat from the engine) and cracks and will arc across the engine's metal- shorting out. (Electricity seeks the path of least resistance)

By design, coils take low voltage energy from the battery (12-Volts dc) and transform that energy into a very high voltage charge (in the range of 30,000 to 35,000 volts) to energize the spark plugs which in turn ignites the fuel.

If a spark plug or plug wire is open or has excessive resistance, the ignition coil's output voltage can shoot higher (above the max threshold of 35,000 volts) and burns through the coil's internal insulation, causing a short.

When a coil failure occurs, the coil's voltage output drops, and the engine may not start or may misfire badly when under load.

Extreme caution should be exercised when handling coil packs that are energized- a lethal dose of voltage can arc across the air into the body. So don't touch them when the engine is running!

As stated earlier, if you need to replace the COP, replace the spark plug too, make sure the spark plug is properly gapped.

You can read more about coils here:

Ignition Coil High Voltage Display

Feb 05, 2017 | 2005 Mazda Tribute

1 Answer

Melted coil pack.


which engine? 4L or 4.7L?????
the pack shorted,
buy a new pack,
and pray it didnt burn up the PCM.
ALL high voltage coils fail.
Ignition, induction coils.
by dirt, heat, and the fact there is the giant
E fails (electrostat fields)
all three work hard to kill insulation and plastic potted coil packs.
also bad spark plugs can make this happen faster
as the voltage hits 100,000 volts in a misfire.
the heat and time can crack most plastics.
cracks are sure DOOM thing.

the coil can also burn up if the ecu ignitor transistor shorts. causing gross infinite dwell
that burns up all coil packs .
i always check my ignitor for shorts before
putting in any new expensive coil.
if you dont, you risk burning up the new coil in less than 5 mins.
some swap packs and now you have 2 burned
fun to watch that? not.
what i do is crank engine and measure my ignitor pulse. (with no pack there) if good
a new pack works. if no pulses the ignitor is bad.
(where is your ignitor)? INSIDE THE PCM. this year.



swap it out.
why not just read the free FSm, as posted here over 200 times
2000 WJ jeep it is, and the book , see chapter spark.
and error on this page, see instrument cluster and get igntiion
grin, not my error.? grin
chapter 8i -page 10 (8,eye)

4.0L and 4.7L sorry cant guess engines this life.

the 4L has huge 6 pack coil RAIL that?
athe 4.7L has, uses 8 COP got that?

my wild guess, based on tea leaves and dosing rods.
is V8
page 10 covers it

http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service

usually the left side goes bad, carbon tracking
most COP i just buy a new cop boot set for small money.
why not youtube 1000 replacing a COP.
you never posted a photo of the melt,
as when i see real damage it talks to me big time.
if the actual coil section melts, bad news

as you can see, it's just 1 screw at id 2.
and one plug at id 3... super simple, to remove
twist CCW, CW, CCW ,say 2 or three time,
the pull out while TWISTING.. to avoid damage.
the put back with dielectric silicon grease on tip
and where body fits tight to head well bore


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Jan 02, 2016 | 2000 Jeep Grand Cherokee Laredo

1 Answer

I have 2001 ford ecpedition 4.6 with a code p0306 cylinder #6 miss fire but has a burning smell, why?


Chances are it had oil on it @ some point and it now has a small hairline Crack, the easiest way to Check this is to Spry water on it with a bottle Sprayer.You should notice a missfire @ this point when running the Engine and since it it is a coil the Plastic covering will burn and smell also, Check the Wire's to the Spark plugs as these are Probably the original fault.if the Electrical charge is not getting to the Plug then it backs up in the Coil.which will cause it to over heat and crack

Dec 14, 2014 | 2001 Ford Expedition

1 Answer

Won't start no power won't push start either ignition was left on for too long and now won't start


When the ignition is left on for a period of time then the coil will over heat and burn out as it is designed for intermittent power not continuous power . I would start at that point by either testing the coil with a multimeter or replacing it with a known good one . Check the ignition module in the distributor for serviceability as it may be burn out also.

Feb 22, 2014 | Suzuki Swift Cars & Trucks

1 Answer

Heater and aircon not working,loud rattling noise and smoke from vent,now not power to fan


It appears your fan itself burned out. When a field coil of an electrical fan burns out it usually makes a lot of smoke. The noise could be something that fell in there that stopped the fan from turning freely. I can imagine it heated up under the strain and burned out.

When you restarted it was burnt out so hence no noise and no fan.
The smell of the smoke should also be clue. Electrical field coils burning has an awful soury type of smell.

Aug 13, 2012 | Peugeot Partner Cars & Trucks

1 Answer

95 grand cherokee straigt 6 cyl replaced coil 3 times in 2weeks. now i have no spark out of coil ut have 12 vots to coil what makes coil burn out? or some other problem?


How does it run when you put the new coil in? Check the positive wire with the ignition off. You shouldn't have any voltage present. Check positive side wiring to ground ( without it connected to the coil ) to make sure you don't have a weak short to ground. Also you can buy coils that have a heat shield built in to prevent the coil from over heating. If you have anymore questions or concerns feel free to ask and I'll answer as soon as I can.

Aug 07, 2011 | 1993 Jeep Grand Cherokee

1 Answer

My car is having power problems. My battery has tested positive, my alternator has tested positive, and I've had my starter fixed. Any idea what else could be causing my car's power problem?


Check Ignition Terminal For Bad Connection Also check Solenoid Coil For Bad Contact ...Also Check Alternator Regulator for Over Heat Diode ..the Current will drop and short Battery and probebly burn fuse and Relay...

Oct 07, 2010 | 1993 Mercury Grand Marquis

1 Answer

2001 Lincoln LS coil replacement


its not a easy job, but you need to get the gasket so it wont leak, theirs some tutorials online, if you dont want them to burn out, dont put the covers back on when you change them, it creates a suction and heat which makes oil spill and burn the coils

Jul 04, 2009 | 2001 Lincoln LS

2 Answers

What causes to burn out one of the ignition coil of 03 bmw 325i


replace the busted transistor in your ECU. For Bosch 30011 or 30014 you can use BU323Z transistor for replacement. it´s 100% pin-compatible and released for transistor ignition systems.

Mar 19, 2009 | 2003 BMW 325

1 Answer

When the fan is turned on with heat, get a burning smell


This is Caused by Dust Settling on the Heating Coils from the Summer Months and Should Disepate after a While and be Just Fine. Please Rate My Response! Thanks!

Feb 05, 2009 | 1997 Buick LeSabre

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