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Old 03-14-2006, 01:17 PM
CarGoBeepBeep CarGoBeepBeep is offline
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Misfiring, even after changing plugs???


Iíve been having a misfiring problem with my 2001 Escape 3.0 V6 and Iím wondering if anyone else has had any similar problems?


When the problem first started to occur it would typically be on a damp day, after the truck had been sitting for a couple of days. I figured the ignition system was getting wet, causing one of the plugs to short out. The engine service light would start to flash when this happened and then stay on solid as the problem started to self correct. If you drove the truck for a short time, it would (I assume) dry out and the problem would go away. After a couple of trouble free days, the engine service light would go out. This would happen about once a month for a few months.

Last week, with the start of the snow melt, the truck once again began running sporadically. Unlike all the other times that this has happen, the weather has not cleared up and neither has the problem. If fact, it got worse. Rather then dropping the usual one cylinder now and then, it has started to effect more then one at a time and shows little sign of letting up. I decided it was time to get off my *** and fix the problem, so I set out to change the old plugs and wires. I figured out the truck has no wires and employs a Coil Over Plug (COP) type ignition, so I decided to simply changed the spark plugs.

When selecting a replacement plug I decided to go with a high quality name brand plug, due to the amount of effort required to get at the back three. I ended up deciding on the new Bosch Platinum +4. I took everything apart last night and installed the new plugs. During reassemble I inspected each coil closely and noticed four of them had small cracks on the top portion. (see Pic1 and Pic2). Not having replacement coils on hand, I decided to try and fix them by covering the top portion of each one (including the two without cracks) with a thick layer of silicon. (see Pic3). Not knowing if this would work or not, I put the two without cracks and the one with the smallest crack on the back three cylinders. This would allow me to test it and if needed, replace the worst ones (in the front) without taking the intake off again.

In the interest of not making this post any longer, letís just say the problem is still present. Itís nowhere near as bad, but at low RPMs it is still dropping a cylinder. Anything over 2000 RPMs, it runs fine, and fires on all six. I had the battery disconnected while I was working on it so the computer would clear. During my test drive last night, I did trip a code on the computer.

Does anyone know how to pull the codes on this Escape? Usually you can jumper a couple of terminals and it will flash the codes out using the service engine light.

Does anyone have a listing of the codes and what they mean?

Anyone have any other ideas for a possible root cause?

Obviously the coil cracks are still a very likely cause, but I donít want to go out and blow a tone of money on six new ones if the problem is something entirely different. If no one has any other ideas, what I will likely do is buy one new coil. Then Iíll swap it in and out of the front three cylinders to see if I can pinpoint which one is causing the problem. Naturally this will only work if itís one cylinder which is consistently causing the problem and if itís in fact one of the front ones.

Iíd love to hear from anyone whose had a similar experienced, or whose got some idea about other areas to test. Like throttle position sensor (doubtful itís the cause, but just an idea). Anyone know if it can be tested and or what the specs are?

Thanks,
Bruce
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Old 03-14-2006, 04:27 PM
ove1 ove1 is offline
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You need to plug an OBD-II scanner or reader into the port next to the steering column. Harbor Freight sells an inexpensive one. Usually the codes pulled will identify the misfiring cylinder(s). It's most likely one or more of the COPs that's the root cause. If you can actually see cracks on them, they are likely "tracking" when they're damp. Once the tracking is bad enough, they'll misfire even when they're dry, just like old-style distributor caps and ignition wires would. But the first step is get the OBD codes pulled to narrow down the cause. Most Autozones will do that for free.
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Last edited by ove1; 03-14-2006 at 04:31 PM.
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Old 03-15-2006, 07:52 AM
CarGoBeepBeep CarGoBeepBeep is offline
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Talking

Thanks for the info. Went to a garage that I used to work for and convinced my old boss to pull the codes for me at no charge. #4 cylinder was misfiring. Replace the COP with new one from Ford ($130 + tax), runs like a charm now. Wish Iíd had time to try and track down a better price, but hey itís running now. Also did a transmission flush last night, holly cow what a difference. Kind of scary actually. I did the remove line from cooler, fill through the dipstick method. Worked great!

Good forum, good info. Keep the posts rolling everyone.<O

Thanks,<O</O

Bruce
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Old 03-17-2006, 07:41 PM
bananaboat bananaboat is offline
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#4 on my 02 had moisture when I replaced the original plugs. If a COP is bad, it's usually #4 on the V6 Escapes.

Let us know how the Bosch Plat +4's perform. I'm about to put some NGK Iridiums in my 05 I4 Escape.

You can usually Google on the codes and find the meaning. My $10 Haynes Escape manual has a long list too. As the prior post stated, Autozone will read the codes for free or you can spend $100 or less on a scanner.
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Old 08-29-2010, 08:27 PM
Jitterbug Jitterbug is offline
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My wife is driveing a 2006 3.0L It has aprox. 150 KMs on it. I want to change the plugs and have purchased Bosch Platinum 4 plugs. How hard is it to remove the intake manifold? How long does the job take?
Thank you
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Old 09-02-2010, 12:33 AM
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bmuhlbach bmuhlbach is offline
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search here for the article how to change your Escapes spark plugs great how to.Not hard to do takes a few hours.When I did mine I installed Autolite double platinums.
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Old 09-04-2010, 11:02 AM
tonyford tonyford is offline
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You have a bad coil pack. Either it went bad coincidently or you broke it when you changed the plugs.

Find out which cylinder is misfiring and change the coil pack.
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Old 09-04-2010, 04:19 PM
scott91370 scott91370 is offline
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You guys realize this post was 4 years old, rigght?
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Old 09-05-2010, 06:44 PM
tonyford tonyford is offline
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Quote:
Originally Posted by scott91370 View Post
You guys realize this post was 4 years old, rigght?

Geez, I hope he got if fixxed by now...
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Old 09-06-2010, 02:42 PM
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bmuhlbach bmuhlbach is offline
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the guy brought it back to life has the issue now. But yea I noticed that also.
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Old 09-06-2010, 02:42 PM
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