Question about 1999 Ford Explorer

3 Answers

MY 1999 Ford Explorer will not start.

My Coil Pack is not fire the plugs on my 1999 Ford Explorer. The coil pack resistance reads good on the primary and secondary. I have positive battery voltage to the coil pack connector, But there is no signal coming from the PCM to the three negative terminal on the coil pack connector. I believe that the PCM may be dead, but I'm not sure how to check it. All of the fuses in the fuse fox are fine as well.

Posted by on

3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Well you may want to lean toward the crank sensor which is what send signial to the coil pack the cam sends to the pcm for fuel the computer is usuall not the issue for these cars just check to see if you have power at the crank sensor an also common signial the crank sensor is going out is if you car dies after it heats up and starts when it cools down

Posted on Oct 11, 2012

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 957 Answers

You may want to check a few other componants before you write-off the ECM. It could be it but its not common. The cam or crank positioning sensor, the ignition pick-up, the MAP or MAF sensor, And possibly the ignition switch.

Posted on May 16, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 4,669 Answers

Does the the check engine light come on when you turn the key on? Have you had it scanned? If the computer is down it might be a pcm power relay. The problem also might be a crank sensor.

Posted on May 16, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Third coil pack in 8 months on my 2003 Ford Windstar, any suggestions on why this would keep happening?

You will need to consider whether it is the primary or secondary side of that coil that fails if possible. A primary side failure could be a failing engine control module causing excessive current to the coil causing it to burn out or internally short. If it is a secondary side failure, the issue is still high current, because the spark voltage is not delivered straight to the plug caused by leakage of the spark in the plug wire to ground, or plug gaps that are too close. Some coils are wired to fire two plugs simultaneous, one upon compression and one (probably) during exhaust in a series circuit, so check both gaps on that coil. And the other possibility is caused by not using resistance plug wires in favor of solid copper and non-resistive plugs as well, causing the secondary current to be very high.

I can't reason why any sensor would cause the coil failure. The basics for coil operation is a quick pulse of voltage to the primary causes a induction of voltage in the secondary when the voltage is removed from the primary. Usually the current in the primary is quite high to create the magnetic field for the secondary. It was the same for old point & condenser distributors as it is now for solid state controls. The problem now is that the solid state MOSFET's used in place of points can develop internal leakage or short altogether. This takes out the coil pack because of the ECM failure.

You are using Autolite plugs right? I find OEM plugs work best rather than trying things like Iridium or other performance options.

I forget which pack went out on my Freestar, but it was OEM coil pack, OEM plug sires & OEM plugs all the way!

Jan 23, 2016 | 2003 Ford Windstar


Misfiring Ford Escort ignition fault finding

1999 Ford Escort firing order and ignition troubleshooting.<br /><span>Refer to the diagram. Cylinders are connected as shown on the diagram in blue. 1 goes to cylinder 1(sparkplug furthest from coil pack), 2 to 2, 3 to 3 and 4 to 4(closets to coil pack).<br />To test the coil pack use a digital volt meter. Measure resistance between coil towers for coil 1(marked 1 in red on diagram) Value should be between 12000 and 14500 ohm. Do the same for coil towers 2. <br />Measure resistance between I and C1. If the measurement is more than 5 ohm the coil is defective. Do the same for I to C2.<br />Measuring voltage at I(Ignition start/run) to ground should be 10V.</span><br /><span>I is connected to the 15A engine fuse. The radio interference capacitor is connected between this line and earth at the coil. Disconnect it to see if it cures the misfire.<br />C1 and C2 connect to the powertrain control module. The module earths each line to make its respective coil fire.<br />Bear in mind that aftermarket coil wires may cause problems with misfiring</span> so use OEM parts where possible.<br /><img src="suzman_6.JPG" /><br />

on Nov 17, 2010 | Ford Escort Cars & Trucks

2 Answers

Jeep 3.7 cylenders 2 & 4 not firing

3.7 V6, mileage?

most likely the HV wires bad.

then bad coil pack.

did you check spark directly at the coil pack?

i use 2 known good HV wires to do that and 2 good test spark plugs.

both plugs grounded to engine (shell)

that is how you test any wasted spark coil pack. 3 coil pack.

if that fails the FSM shows, unplugging it and check the coil resistances. if wrong the pack is bad,

keep in mind the res. can read ok and coil be bad ,due to internal insulation break down (internal shorts)

if thats ok. the resistance , make sure the wires are not (primary)

to the coil (the low voltage connnector)

if that is ok, its mostly likely a bad coil, (pray not bad PCM)

if tool-less? start with cheap parts , work to expensive. (guessing)

now wasted spark 101.

if one line opens , both spark plugs die. no spark

the wasted spark is wired in SERIES. ( like Christmas lights)

the magic cuts cost of 6 coil\'s.

so if the HV wires are say, cheap , carbon wire and open

you lose, both spark plugs. use MAG wire and end this issues.

get some nice NGK mag wire or Bosch Mag wires.

you can see i hate carbon wire. for good causes.

(carbon string wire)

mag wires is real wire that is coil spun and is inductive. it

has the correct impedance but is not a resistor its and inductor.

and lasts the longest , and worth every penny.

Mar 29, 2014 | 2006 Jeep Liberty

1 Answer

No power going to coil pack

Hi, first check fuse 19 inside the truck. If that's good, try disconnecting the capacitor from the wire--it may have burned up inside. If still no-go, check the resistance across the primary (red versus each tan wire) of each coil in the coil pack. Resistance should be at least 1 ohm, more like 2 or 3 ohms. If not, replace any shorted coil. Please let me know if you have questions, and thanks for using FixYa.


May 08, 2011 | 2001 Ford Explorer Sport Trac

1 Answer


The is alot of copper windings in the coil pack. There is a primary and secondary side. If there is a break in these windings your coil won't work. You can test your coil with an ohmmeter. If you get a resistance reading it should be ok, if "open circuit" you'll get no reading and that is the fault. It is impossible to repair the coil. The only option is to replace it.

Oct 19, 2010 | Nissan Pickup Cars & Trucks

1 Answer

Number one cyl on coil pack not firing, all others are, codes reads misfire on 1 cyl should i replace the coil pack and how do you test the pack

Check the spark plug first. then if the plug is good you wil need a digital ohm meter to test the coil pack. if you need to know how to remove the coil pack let me know, to test put on ohms should not have more than 2 1/2 ohms restance betweent coil lead to coil connector. If you test the coil pack on both sides of the pack and get a reading then the coil is bad, if it does not read then you haave a bad fireing plate diode.

Mar 12, 2010 | Ford Explorer Cars & Trucks

1 Answer

On 1992 ford explorer 4 li where does # 1 plug in on coil pack

i belive its 4 1
6 2
5 3 standing in front of the engine on the coil pack,but the engine starts at 1 on the passenger side and goes straight back on that back to 2 and 3,driver side is4,5,6 straight back,hope this helps

Sep 05, 2009 | 1990 Ford F250

1 Answer

88 grand am

If you have a volt/ohm meter, you may want to first ohm check the resistance between the two spark plug towers on each ignition coil pack. Simply remove the spark plug wires from each coil pack and test. Both (if good) should test about the same resistance, (about 5-7 kOhms, but I don't have the exact specs handy on this particular vehicle. The reading may be higher, maybe around 7-12kOhms) but nonetheless, the reading of the 1-4 coil pack should closely match the 2-3 coil pack. If not, the new coil pack may be faulty and should be returned for a replacement.

Also, when you remove the 1-4 coil pack, take a look at the primary spade connectors (2 lugs) coming out of the ignition module. Make certain these are clean and free of rust or corrosion. If so, simply (and gently) use a finger nail file or 400 (or equivilent) sandpaper to file the corrosion off and re-attach the coil pack.

If one or both of these don't fix the problem, you may have to look at replacing the ignition module. But only do that after exhausting the other simpler and less expensive tests! :)

I hope these tips help you out or at least point you in the right direction! :)

Aug 19, 2009 | 2003 Pontiac Sunfire

1 Answer

I have a 99 ford taurus that occasionally wont start I put my Creader brand codereader on it and got the code 0353 (ignition coil c primary/secondary circuit malfunction)dont exactly know what this means....

Your car's computer has sensed a problem with your coil pack. the thing is, it could be your coil pack but it could be that something else is effecting the performance of the coil. Example; Plugs, wires, wiring to the coil pack. Look at the cars maintenance history, it might help in leading you to an answer.

Apr 27, 2009 | 1999 Ford Taurus

1 Answer

Bad coil pack on crown vic

well if you have checked the spark plugs and they look good then its probly the coil If the plugs have never been replaced i would start with a tune up and see if this fixes the problem. If not there is no good way for you to test it you would need a computer to hook up to the car

Jan 24, 2009 | 2001 Ford Crown Victoria

Not finding what you are looking for?
1999 Ford Explorer Logo

Related Topics:

478 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers


Level 3 Expert

5501 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides