Question about 2005 Ford Escape

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My 2004 escape shows a misfire on cylinders 1,2,3,4,and 6 it will not start there is voltage at coil packs and wiring ohms out correctly maybe a bad pcm?

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You need to replace all 6 coils over sparkplugs. Average cost is 1,000.00 dealer price.
I worked for Ford Lincoln Mercury

Posted on Apr 02, 2011

  • Jim Mar Apr 02, 2011

    I wanted to add that this can be done by a mechanically inclined person, that has the knowledge on how to remove the intake manifold, this is indeed tedious to do. You have to remove the plenum, the intake manifold to get to the 3 coils in the back of the engine, all one needs to remove the coils is a 1/4 inch socket wrench, an extention, a universal and a 5/16th extention socket, to remove the coil hold down screw. Removing the intake manifold takes knowledge because if one removes the fastening screws that secure the intake manifold not in the proper sequence, could potentially warp the intake manifold.

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1 Answer

2004 Ford Escape engine missfire


that sounds like those cylinders injectors might be the problem . When an injector over fuels or fails to supply fuel it would create a misfire just like if a plug or coil failed

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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 />

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2004 Dodge Stratus 2.4 DOHC. Was misfiring and barely running. Code showed P0300, P2302, P2305, P0700. Found Coil Pack had a burned spot near the #2 wire and large crack between #2 & #3! Replaced Coil and...


Reminds me of when a friend of mine had a car with carbon tracks on the distributor cap. I wiped it clean and it worked perfectly. Are the plug cables going to the correct cylinders in the correct order? A hanes service manual actually put the wrong order down in a mustang manual.

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Mis fire code po300 po68


300 is random misfire and 306 is cylinder #6, I would check the coil pack on #6. If it has separate coils per cyliner, swap the coil, see if the misfire goes to that cylinder. If it does replace the coil.
If it has three coil packs you can still swap the coils. If that doesn't fix your problem, then you will have to check the injector with an ohm meter. resistance between the prongs should be between 11 to 15 ohms. check another injector and they should be relatively close. Let me know
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I have a 2004 ford freestar 3.9 The engine light started blinking and the engine was misfiring. The computer put out a code that cylinder 1 was misfiring. i have replaced the plugs and wires but still...


Hi, the first step I recommend is to check for spark. You can do this by starting the car and then carefully pulling up the boot to the #1 ignition wire at the coil. If sparks are jumping inside the boot, you have spark and the ignition system is working.
jturcotte_504.jpg
1. Ignition: If there is no spark, shut of the engine and use an ohmmeter to check the impedance of the coil. Take the boot off, and connect your ohmmeter from the coil terminal to the engine ground. The resistance should be around 10-20 kohms. If not, replace the coil. If yes, the problem is the ignition module under the coil.

Now, assuming you have spark (which I believe you do, because the coil runs 2 cylinders, and you only have one cylinder that is misfiring), the problem will be a lack of compression or a bad injector (or possibly the injector wiring).

Note: I will provide repair steps once the troubleshooting is complete and the problem identified.
Also, if you do not have a multimeter, you can get one for $10-20 at radio shack or even Walmart. It will save you money overall--or maybe you have a friend that you could borrow a meter from.

2. Injector: The next easiest test to run is to see if the injector solenoid is clicking. You can do this by holding a long screwdriver to the injector and hold the other end of the screwdriver to your ear. With the engine running, you should hear the injector clicking. If not, you have a bad injector or a wiring problem. To determine whether the problem is the injector or the wiring, pull the connector off the injector and measure the AC voltage in the connector with the engine running. The voltage should be 1-2 volts or similar to that voltage of any other injector connector.
If the voltage is good, but the injector is not clicking, replace the injector.

3. Valves/compression: the last possible reason for a misfire is a lack of compression. The intake valve must open to accept a fuel/air charge, and both valves must be closed for the cylinder to fire. Sometimes an exhaust valve will burn and not hold compression. A blown head gasket can also cause this problem. The test we use to check the valves is a compression test. You can borrow or purchase a compression tester if you get to this point. Remove a few of the spark plugs including the cylinder that is misfiring. Screw the compression tester into the spark plug hole and crank the engine for a few revolutions. Record the pressure on the gauge, release the pressure, and go on to the next cylinder. If the pressure is much lower on any cylinder as compared to the highest cylinder, the cylinder head will have to be removed to correct the issue.

Please let me know the results of your troubleshooting and feel free to ask questions as you go.

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1 Answer

1998 chevy venture has electricity arcing across the harmonic balancer


The coil pack on these engines runs hot, so it's important to make sure there is heat sink grease under the coil to transfer heat. If the coil module gets too hot, it will fail.
If an engine is hard to start or has a misfire at higher speeds, the problem may be a weak coil, a bad plug wire, or a fouled or worn spark plug. On 1996 and newer vehicles, you should get a cylinder misfire code. A code for one cylinder would likely indicate a fouled plug, bad plug wire, or possibly a clogged or dead fuel injector, or a compression leak (burned exhaust valve). Misfire codes for two cylinders that share a coil would likely point to a bad coil.
Another way to figure out if a misfire is a bad coil is to swap two of the coils on the coil pack. If the misfire moves to the new cylinders, the problem is the coil. If the misfire remains in the same cylinders, the coil is OK and the problem is the wires, plugs, injectors or compression.
If you test a coil with an ohmmeter, the test specs are 0.5 to 0.9 ohms for the primary terminals under the coil, and secondary resistance of 5,000 to 8,000 ohms at the high-voltage terminal.

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Remove the plugs from the head. Insert into the coil wires. Make sure they are properly earthed on the engine. Crank the motor and check for spark at each of the plugs.
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).
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.
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.
Measuring voltage at I(Ignition start/run) to ground should be 10V.
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 problem.
C1 and C2 connect to the powertrain control module.
Bear in mind that aftermarket coil wires may cause problems with misfiring, so see if you cant find an OEM coil wire to replace the broken one before replacing anything else.

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1 Answer

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300 is random misfire and 306 is cylinder #6, I would check the coil pack on #6. If it has separate coils per cyliner, swap the coil, see if the misfire goes to that cylinder. If it does replace the coil.
If it has three coil packs you can still swap the coils. If that doesn't fix your problem, then you will have to check the injector with an ohm meter. resistance between the prongs should be between 11 to 15 ohms. check another injector and they should be relatively close. Let me know
Good luck
Randy

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1 Answer

2004 Ford Escape 3.0 V6 - I had the spark plugs replaced when first experienced misfiring, and code said misfire on #4 cylinder. Right after replacement, things were fine. About a month later, starting...


If you had a scan tool you would be able to see the cylinder misfiring, i would try replacing the coil boots on the coil, there like replacing sparkplug wires but there small boots that pop on the end of coil with steel spring inside them, run truck and if misfire continues then you have a coil thats going bad,hope this helps. note if you could find out which cylinder it was you could swap coil with another cylinder and if skip move to that cylinder then you would know if its a coil this is after replacing boots.

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