Question about Cars & Trucks
5.4 liter V8 expedition is losing power and shaking. When it first started check engine light was flashing. Now its on but truck only periodicaly acts up
You have a bad COP Ignition Coil or several
They only misfire whenever they feel like it
If you had professional software --you could road test in
Mode #06 & look at cylinder misfire counts
You need to buy a couple of coils & try in cylinder #5,
front one drivers side
If that isn't the correct one or you have several,walk the
other new coil to get to the bad ones
Disregard any other stray codes until the coil issues are
If it stays on your have Class B misfire
If it flashes you have a Class A misfire that could
damage the exhaust converter
Posted on Dec 03, 2012
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Posted on Jan 02, 2017
Like to other guy said, give it a tuneup. Also try SEAFOAM to clean carb up of slug. Also check to make sure the butter fly for the choke has not come loose, causing it the choke it down. Failed choke pull-off.
Posted on Feb 02, 2009
SOURCE: "check engine light flashing"
The flashing check engine light is typical of a misfire issue. There are two things I would do to start with.
1. Take the vehicle to an auto parts store like Autozone and have them hook up their scan tool so that they can retrieve stored trouble codes. Even if the check engine light is not on, they should be able to retrieve recently stored codes.
2. Do a complete tune up. New plugs, new plug wires, new air filter, new fuel filter if it has not been done recently.
If the parts store pulls the codes and they cannot tell you what they mean, post them up here and I will see what I can dig up for you.
Posted on Jan 02, 2009
You have a really bad misfire going on. i would not drive the car but if you get it towed you can get the engine codes read which will give you more of an idea on whats going on. Otherwise its just a guess.
Posted on Mar 19, 2009
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