Misfire?

Tiny
MERCAD3
  • MEMBER
  • 2005 FORD ESCAPE
  • 6 CYL
  • 93,000 MILES
I have a 2005 Ford Escape it has a hesitation while running in overdrive after the engine has warmed up check engine light flashes took it to local garage no codes came back on the reader. Any suggestions to whan might be causing the hesitation or misfire?
Monday, March 7th, 2011 AT 7:26 PM

8 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lack of acceleration, chugging, hesitating********, bogging, misfiring etc. Could be caused by one of the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it and keep testing.
Was this
answer
helpful?
Yes
No
Tuesday, March 8th, 2011 AT 2:36 AM
Tiny
JHOGG
  • MEMBER
  • 1 POST
  • 2001 FORD ESCAPE
  • 123,000 MILES
Lately my car sputters and jumps while accelerating. It stops when I take my foot off the gas. Also sometimes after stopping at a stop sign, the vehicle takes a second or two and goes really slow till the engine catches up, then revs up and jumps quickly to catch up to the gas pedal being down. I heard it could be either spark plugs or transmission fluid
Was this
answer
helpful?
Yes
No
Saturday, April 13th, 2019 AT 5:00 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,640 POSTS
Has the check engine light come on?
Was this
answer
helpful?
Yes
No
+1
Saturday, April 13th, 2019 AT 5:00 PM (Merged)
Tiny
MADMIKE1735
  • MECHANIC
  • 951 POSTS
Coil packs are most common. They need to misfire an outragous # of times to set a check engine light. Your best bet is to gain access to a suitable scan tool, either a snap on modus, or an OTC genisys. From there, get into mode 6. Find monitor $53. This is your misfire monitor. Im guessing this is the 3.0 v-6, so you will need to go through all 6 parts of the $53 monitor, and find if any cylinders are leaving misfires.
Was this
answer
helpful?
Yes
No
+1
Saturday, April 13th, 2019 AT 5:00 PM (Merged)
Tiny
AMAZINDA
  • MEMBER
  • 2 POSTS
  • 2004 FORD ESCAPE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
I have a 2004 ford v-6 escape and when it is rains or moist out it seams like it misfires, can do this for a 100 miles or a few, on hot and dry days runs great. We had it in a grage and they can not find out. Engine light gave code and they fix code and charge @ $600.00 and the next time it rain, it came back. Garage said it would be another $600.00 range, same thing was wrong again (coil)
Can you help me. Dave
Was this
answer
helpful?
Yes
No
-1
Saturday, April 13th, 2019 AT 5:00 PM (Merged)
Tiny
AMAZINDA
  • MEMBER
  • 2 POSTS
After reading ford escape They misfire when it rains, and it seams like code says coil 5, WHY. Must be a Ford Thing. Did anybody find the real reason, Please let me know.
Was this
answer
helpful?
Yes
No
Saturday, April 13th, 2019 AT 5:00 PM (Merged)
Tiny
ESCAPE OWNER
  • MEMBER
  • 11 POSTS
The misfiring will send unburned fuel into the Catalytic Converter thereby clogging it. This is a common problem with Escapes. Don't drive it when misfiring and get the problem fixed. Cats have a warranty of 8yrs or 80,000 miles.
Was this
answer
helpful?
Yes
No
Saturday, April 13th, 2019 AT 5:00 PM (Merged)
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi Everyone,

Hopefully I can shed a little light on what is happening here on an Escape. There are a couple of things that it could be in addition to the coil. These coils on this engine are called Coil on Plug. What this means is the coil sits directly on top of the plug. This is a good design as it is more efficient and is actually more reliable because there are no spark plug wires so the actual spark does not need to travel as great a distance. There is just a wiring harness, coils, boots, and plugs.

The issue is, the way they are positioned in the engine. They are relatively vertical on the engine and the spark plug hole can actually hold water in it. Once this happens the boot that is around the spark plug and attaches to the coil will swell. Once this begins to swell it can cause the coil and plug to arc and it causes a misfire. This is also why they seem to misfire when it rains or high moisture. The water is getting where it shouldn't. Unfortunately, the coil gets condemn to often. Usually the coil is ok but the plug and boot are the issue.

If you have this engine with coil on plugs, I would suggest just swapping only the coil to another cylinder and then see if your misfire moves with it. If it moves, then your coil is the issue. If it stays in the same cylinder then the boot, plug, or another issue is causing your misfire, but at least you know it is not the coil.

These are very easy to move. I attached the procedure. It is literally, remove the engine cover, un-clip the coil connector, remove the 8mm bolt, pull the coil/boot assembly out. When removing the boot, you will find a long spring attached to the coil. Make sure not to damage this as this is what delivers your spark.

When reinstalling the bolt, DO NOT over tighten it. You are putting a bolt into a thread that is encased in a plastic plenum. If you strip it, you need to replace the plenum.

When putting the boot back on the coil, put dielectric grease on the opening where the spring slides back in. This will "drag" the grease down the inside of the boot and help fend off moisture.

When reinstalling the coil/boot assembly, put dielectric grease around the top of the boot on the outside where it seals inside the spark plug hole so that it creates a better seal and tries to keep moisture out.

As for the post about the catalytic converter. That is an accurate statement that the converter can be damaged due to unburned fuel and it is never a good idea to drive with a misfire for this reason. However, coolant due to a leaking head gasket and oil in the combustion chamber that get expelled to the converter are the fluids that can clog the converter. Unburned fuel will ignite when it hits the hot exhaust and it will overheat the exhaust causing leaks and internal damage to the converter.

Hopefully, this helps with some more ideas about the issue with this engine and the next time you are told that you need ANOTHER coil, make sure the swapped it to be sure the coil is the issue. Most techs that replace the coil, do not reuse the plug and boot. They get those new as well so the issue may have just been the boot but you got a coil to go along with it.

Thanks

Kenny
Was this
answer
helpful?
Yes
No
+3
Saturday, April 13th, 2019 AT 6:31 PM

Please login or register to post a reply.

Sponsored links