Question about 2001 Ford Taurus

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How do i test plug coil

There must be a way to test without have to buy replace method

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On a COP individual coils-- you should have a couple spare
new coils-- to walk to different cyl when you get codes

On the module & ignition wire system--you get an HEI Test
spark plug with the clip & use that

You can test cop but need the adapter for that

The pros use an oscilloscope to look at primary &
secondary signals as well as current ramp injectors

Posted on Dec 02, 2012

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3 Answers

It is only firing on three coils it is like no power going to #3 coil what could be wrong? Wiring?


VALVE COVERS CAN LEAK INTO THE COIL WELLS AND SHORT OUT THE COIL. BUY A NEW COIL AND INSURE THAT THE PLUG IS GOOD AND NO OIL IS IN THE COIL WELL.

Apr 03, 2015 | 2007 Ford Focus 2.0

1 Answer

How do I check the pcm on a dodge 5.2L 2001


Need factory quality wiring diagrams & the
ability to know how to read them & learn the circuits
your testing,so you can choose the test method or equip
for the testing & establish test points, without inducing current
back into the PCM & ruining it

Have you checked for OBD Codes ?

Is the Battery an good ?

Are all vehicle grounds you can find clean & tight ?

Are there any wiring rubbing or connectors loose ?

Do you have a crank signal or injector pulse when cranking the motor ?

Sep 26, 2014 | Cars & Trucks

1 Answer

2003 Impala misfire. Plugs and wires are good, possible distributor or coil?


The engine does not have a distributor. There are 3 coils for 6 cylinders.
You can switch coils with another cylinder and see if the problem moves.
You can also check the plug for spark.
Generally speaking, oil on the inside of a plug is caused by internal cylinder problems.

Apr 17, 2013 | 2003 Chevrolet Impala

1 Answer

SKIPPING PROBLEM . SPARK PLUGS & WIRES HAS BEEN DONE. THERE'S NO 12 VOLTS AT THE COIL CONNECTOR PLUG WITH THE KEY ON. LYMAN


Sound like a ground problem; the fastest way to identify the Power and Ground Circuits is using a wiring diagram. If you don't have one you'll have to find out by trial and error as you probe each circuit.

The power circuit is tested with the Key On and Engine Off. Place one end of your multimeter or Test Light on the Battery Negative Terminal and with the other end, probe the Power Circuit. Turn the Key to the Run position. If the Power Circuit is OK, the Multimeter will show 12 Volts or the Test Light will light up. Here are the possible results:
* You got 12 Volts on the Power Circuit
Good, this is a good sign. The next step is to check the Ground Circuit of the Coil on Plug connector that you're testing.

* No Power in only one Ignition Coil
Without 12 Volts, the Coil-on-Plug Ignition Coil will not work, thus you have just eliminated that specific Ignition Coil as the source of the fault. Replacing the Ignition Coil with a new one will only be a waste of time and money since, without Power the new one will not Spark.
Since the Power Circuit is shared by all of the coils on the majority of Coil-on-Plug Ignition Systems. The most likely cause will be an open short in that Ignition Coil's Power Circuit.
You'll have to consult your Repair Manual's wiring diagrams to make sure how everything is wired up.
After repairing the short, re-do the Spark Test to verify the Ignition Coil is now working.

* No Power at any Ignition Coils
The fuse or relay that supplies this voltage is blown or BAD.
You'll have to consult your Repair Manual's wiring diagrams to see where this fuse and/or relay is located and replace as necessary.
After replacing the blown fuse or the defective relay. Retest the Ignition Coil.

Them, the Ground Circuit is tested with the Key On or Off. It doesn't matter because this is a Chassis Ground. Place one end of your multimeter or Test Light on the Battery Positive Terminal and with the other end, probe the Ground Circuit. If the Ground Circuit is OK, the Multimeter will show 12 Volts or the Test Light will light up.

* You got Ground
Good, now the next step is to verify that the Coil-on-Plug Ignition Coil is receiving the Triggering Signal. This info belongs to the next section of this article.

* No Ground in only one Ignition Coil
Without this Ground, the Coil-on-Plug Ignition Coil will not work, thus you have just eliminated that specific Ignition Coil as the source of the fault. Replacing the Ignition Coil with a new one will only be a waste of time and money since, without Ground the new one will not Spark.
Since the Ground Circuit is shared by all of the coils on the majority of Coil-on-Plug Ignition Systems. The most likely cause will be an open short in that Ignition Coil's Ground Circuit.
You'll have to consult your Repair Manual's wiring diagrams to make sure how everything is wired up.
After repairing the short, re-do the Spark Test to verify the Ignition Coil is now working.

* No Ground at any Ignition Coils
This usually happens thru' human error in most cases and is a very rare thing. Usually the engine was replaced and this ground was not re-attached.
You can Ground this circuit with a jumper wire. Jumpering to Ground just one Coil-on-Plug Ignition Coil should provide Ground to all of them (consult your Repair Manual's Wiring Diagrams to be sure).
With this jumper wire to Ground attached, crank the vehicle.
If in fact the Ground Circuit does have an open short, this (the jumper wire to Ground) should make the vehicle start, or at least get the Ignition Coil to Spark.
Repair the open short and retest for Spark or retry starting the vehicle.


Hope this helps. Keep us updated.

Aug 19, 2011 | 2003 Chrysler Town & Country

1 Answer

I know I need plugs, plug wires. Do I need a distributor or coils?


Spark Plugs ---get replaced every 3 years & around 60,000 miles

Wires if you have them,sometimes last 20 years

If you have to ask about coils & distributors, you need to
educate yourself,a lot & soon & keep doing it

Other than the plugs,NOTHING EVER gets replaced on any
vehicle without testing a component & it has to fail a test.

Jul 30, 2011 | Cadillac DeVille Cars & Trucks

1 Answer

What is the spark plug setting for izuzu axiom 3.5 v6 my car is hard starting at 152000 miles, i replaced the timing belt flushed the injectors replaced fuel filter


Hi. You will need to Adjust each spark plug gap to 0.031-0.035 in. (0.8-0.9mm). With that said; i would check the status of all the ignition coils that are on top of each plug. Your engine is equipped with a COP coil design. Each plug will have its own individual coil on top. Each coil can be tested for proper resistance levels. You may have one or several bad coils that are malfunctioning. If these coils have not been changed, I would recommend to test each one to be sure that they are functioning at a high level.

Here is a simple testing procedure to verify that your coils are functioning as designed. A weak coil will cause a very hard start situation. Follow carefully:

1.First you will need to check the ignition coil assembly for insulation. Check terminals for corrosion or damage, and replace as necessary.

2. Next; Gather you ohmmeter or multimeter and measure the resistance of ignition coil assemblies and compare with the following specifications:

a. Terminal 1 to 2: Without 0 ohms or infinity maximum ohms.

b. Terminal 1 to 3: Without 0 ohms or infinity maximum ohms.

c. Terminal 2 to 3: Without 0 ohms or infinity maximum ohms.

3. Now; If the measured values exceed the specifications listed above, the ignition coil must be replaced.
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Aug 16, 2010 | 2003 Isuzu Axiom

1 Answer

In my 2002 dodge durango myh check engine light is on and I took it to auto zone to have them check the engine codes. Upon the completion of the test I got 4 engine codes P300 P301 P302 and P0442. The...


Do you know how to test electrical circuits ? Is the PCM - engine computer controlling the coils ? Test with a test light ! One side has B+ voltage the dark green with orange stripe wire ,the other goes to the PCM , which will suppy a ground when triggered . You can test this with a test light . or you can buy a noid light at the parts store . If you replaced the coil an spark plug an that code comes back ,could have a burnt driver inside the computer , test it first !
How to test computer transistor driver without scan tool

Jun 21, 2017 | 2002 Dodge Durango

1 Answer

I have a 86 4WD Hardbody Z24 engine- It has 2 coils and 8 plugs even thogh its a 4 cyl. I think intake and exhaust plugs. One side is not firing. Changed coil and it didnt fix. How can I test and figure...


distributor is probably jumping fire unplug one coil wire and see if it starts if so hook back up while running and should shut down when you plug it back in if so its the cap.let me know if anymore help

May 17, 2010 | 1986 Nissan Pickup 4WD 1986

2 Answers

I have a ford f150 that is mis firing on number


The most coomon thing is a coil. You cant really test without a scanner or way to test coil output. But you should replace the spark plugs and the #3 Ignition coil. Use MOTORCRAFT PLATINUM Spark Plugs only. Number 3 is the 3rd back on the Passenger side. Be sure there is no water/coolant on the spark plug well, if there is coolant, one of the heater hoses may be leaking. Take coils out, using a 7mm socket, be sure to blow out the spark plug hole with compressed air before removing the spark plug. Take the rubber boot off each coil and place some "silicone dielectric grease" in th ecavity for the coil end to keep out moisture. Cyls 1 2 3 4 on pass side, 5 6 7 8 on drivers side. After you are done, remove the positive battery cable for a few minutes to clear the memory and long term fuel trims.

Nov 11, 2009 | 1997 Ford F150 Regular Cab

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