Question about 2000 Ford Expedition

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Misfire in #7 cylinder. think i need to change the plugs. don't know how.

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This is what I do when I have a miss on one cylinder with a coil-on-plug ignition system: Take the coil off of the suspect cylinder, and remove the plug. If you see no obvious problems with these 2 parts, swap each with another in a different cylinder, paying close attention to where you moved them to. For example: move #7 plug to #5, and #7 coil to #3. Now run the engine and see which cylinder has the misfire. If it moved to #3, you have a bad coil. If it moved to #5, the plug is bad - replace them all unless they are very new. To replacce the plugs, remove each coil and you can access the plug beneath with a standard spark plug socket and extension. Good luck!

Posted on Jun 28, 2009

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My car shakes when my cars is on and when I'm on red light or stop it shakes.. I don't know what's the problem. I just had Cylinder # 7 change and sparkles and crechan (don't know how you...


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Missing,viborating


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The vibrating tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
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P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
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Jun 23, 2011 | 2009 Ford F-150

1 Answer

Vehicle missing,shaking,engine light comes on


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The shaking tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
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I would like to know what does this codes means 300 302 303 304 305 and what to do to fix it. I have change the sparks and cables, the coils and the Orings of the ingectors. please help me


P0300 random/ multiple misfire detected
P0302 misfire cylinder #2
P0303 Misfire cylinder #3
P0304 Misfire cylinder #4
P0405 Misfire Cylinder #5

This is pretty common thing, and if you have already changed out the wires, coils, and and plugs then you maybe having trouble with the ECU. The good news is that there are local shops (not as expensive as dealerships) that can either flash or replace your ECU. If you don't have a local shop in your area that does this kind of work, then you will be stuck with the dealership.

Good luck,
--Zim--

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You've tried everything but getting the timing checked out. You've done all the other parts of a tune-up but that.

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