2004 escape misfire
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2004 escape misfire
Hello! My wife has a 2004 escape v6 (3.0L). The valve cover seal was leaking so I decided, why not change the plugs since I'm already going to have the intake manifold off.
I got down there, replaced the seal (just the front side, didn't want to disassemble something that wasn't broke) and then replaced all 6 plugs and boots (with springs). Fired it up and everything seemed fine. She went to drive to work and the CEL started to flash. I read the code and there were 4 (Don't remember exactly what they were), but it was a combination of things resulting from a misfire in cylinder 4. Since it was one of the front ones (thank goodness) I just pulled the plugged and replaced it hoping I had gotten a dud from the factory. Nope, still doing it.
I didn't take off the fuel lines, just the air intake on the top. I did not change the coils, but everything was running fine before I changed plugs so logic would dictate it is something I did. Only seems to misfire at higher speeds. Any ideas are appreciated!
Also, her battery light randomly comes on, but the battery and alternator test good. This has been happening a while.
I got down there, replaced the seal (just the front side, didn't want to disassemble something that wasn't broke) and then replaced all 6 plugs and boots (with springs). Fired it up and everything seemed fine. She went to drive to work and the CEL started to flash. I read the code and there were 4 (Don't remember exactly what they were), but it was a combination of things resulting from a misfire in cylinder 4. Since it was one of the front ones (thank goodness) I just pulled the plugged and replaced it hoping I had gotten a dud from the factory. Nope, still doing it.
I didn't take off the fuel lines, just the air intake on the top. I did not change the coils, but everything was running fine before I changed plugs so logic would dictate it is something I did. Only seems to misfire at higher speeds. Any ideas are appreciated!
Also, her battery light randomly comes on, but the battery and alternator test good. This has been happening a while.
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Thanks for the reply Scott91370! I forgot I asked this here. I did fix it exactly this way, since it was the easy to reach front plugs, I swapped 4 and 6 and the computer then registered misfire on 6. I thought for sure it wouldn't be the coil, but maybe the change in resistance of the new plug caused damage. Who knows. Autozone wanted $70 for a coil so I ordered next day shipping from Amazon.
Fleet Mechanic
Joined: Dec 2008
Posts: 1,911
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From: Burleson, Tx
They are a finicky thing those coils. Seems the either last forever or fall apart when plugs are done. I have swapped 3 right after plug changes. Glad it was at least an easy fix since it wasn't cheap.
. At least I'll know its a possibility for next time. I appreciate the help.
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geauxtigers1324
Modular V8 (4.6L, 5.4L)
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Sep 18, 2010 08:31 PM
