Question about 2002 Ford Expedition

4 Answers

How do I determine what is causing power loss when it can be multiple issues?

.Vehicle has lost power .Check Engine Light Flashing .Got Misfire Code #3 cylinder first time .Got misfire code #5 cylinder second time .Is #3 & #5 sharing same coil?

Posted by on

Ad

4 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Ford Master
  • 4,536 Answers

U need a new coil. They wear out from heat and age. Also bad plugs put strain on it cause they draw to much currant

Posted on Dec 07, 2014

Ad
  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 10 Answers

Flip the coils and see if problem goes to another plug!

Posted on Dec 07, 2014

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 103 Answers

Misfires can be caused by several things, bad plug, bad plug wire and even a bad coil. There is a separate coil for each cylinder on these models. So your starting point is too pull the plugs and examine them for excessive carbon build up or an oily residue. Properly firing plugs should be clear of deposits.
Replacing the plugs and checking for the misfire code will narrow it down a bit more. Likely you will need to replace the coil for each mis-firing cylinder. If this has gone on for a while, the unburnt fuel in the exhaust may cause some damage (clogging) of the catalytic converter(s) which will restrict the exhaust, result is poor acceleration and poor gas mileage.
Starting point is plugs and coils.

Posted on Dec 07, 2014

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Ford Master
  • 1,249 Answers

Change spark plugs

Posted on Dec 07, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

  • 21 Answers

SOURCE: Misfire on cylinder #6

this is an easy fix, disconnect the wire harness, then with a 7mm socket pull up the retaining screw (to the right of the coil pack). Once removed, carefully pull up on the coil pack so the entire unit comes straight out. You may have to squeeze a bit around the fuel rail. When installing the new coilpack, be sure to use electric grease to prevent moisture problems. Screw in the retaining screw and reconnect the wire harness. I recently changed mine out due to misfires and "bucking" and the engine is purring! good luck.

Posted on Dec 27, 2008

chuck943
  • 783 Answers

SOURCE: engine code p0307 cylinder #7 misfire

It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.

Posted on Feb 05, 2009

  • 599 Answers

SOURCE: 2002 Ford Explorer V6 misfire

check for spark/fuel /vacuum -air leaks.....test plugs..then wires .and egr valve and snorkle and intake areas for air being introduced near each cylinder with carb cleaner wafted near then while idling

Posted on Mar 14, 2009

  • 25 Answers

SOURCE: 2005 f150 5.4L misfire on multiple cyl check

THIS JUST HAPPENED TO MY 5.4. HAD IT PUT ON COMPUTER TO FIND OUT WHICH CYL'S WAS MISFIRING, AND REPLACED THE COIL PACKS ON THOSE CYL'S. THIS FIXED MY PROBLEM. IT WAS AN EASY FIX BUT EACH COIL PACK IS AROUND 50$, AND EACH CYL. HAS ITS OWN SO THERE IS 8 ON OUR ENGINE NOT A CHEAP FIX. NOT GOOD TO TRY TO DRIVE WHEN ENGINE LIGHT IS FLASHING WAS TOLD THIS CAN CAUSE CATASTROPHIC DAMAGE TO THE ENGINE. HOPE THIS HELPS, AND GOOD LUCK.

Posted on Dec 29, 2010

alillie
  • 1 Answer

SOURCE: 2003 Ford Taurus cylinder misfire #1 and #5 code

Had a similar issue with a 2003 ford taurus. Error codes of p305 misfire on cylinder 5 and first 1000 rotations. It did not smell like eggs. Rough/vibrating idle and lacking power at times.

Replaced spark plugs and wires. On the mine a 2003, I needed to remove the upper intake manifold, i believe it is called. Note not to pull out tubes on bottom when you life. This was to get at the rear spark plugs. 10mm 8mm 7mm and a flat head screw drive is all it took o and about 4 hours, im no mechanic : P I also used a splash of seafoam on the EGR valve and replaced the seal. I was impatient so i didnt soak it like I had read.

Anyways, turns out one of the spark plug wire boots had burnt. Also, 2 were severely corroded. This seems to be the solution, a basic tune up i guess.

Posted on Mar 19, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Why the loss of power and po300 code?


HARD TO SAY WITH OUT BEING THERE BUT THIS MIGHT HELP .
Crankshaft sensor Was the trouble with my 99 Chevy truck after replacing many components like coil cap rotor wires and so on .
http://www.obd-codes.com/p0102 Code P0300 Causes and Fixes Code p0300 is a code that is generated when your engine has a misfire that is not related to only one cylinder. Sometimes this code will be set in addition to other codes such as p0301 which means that there is a misfire on cylinder 1 (cylinder 1 is the number one cylinder when looking at the firing order. It is generally the forward most cylinder on the engine.). If these engine codes are present as well the you should diagnose those first as they are probably causing code p0300.
This code will set your check engine light and needs to be fixed as soon as possible. If it is not then you will probably need to replace your catalytic converter as well as the problem that is causing your misfire.
There are many causes for this obd code. Since it is a "random misfire" or "multiple misfire" this means that the misfire is on different cylinders and not just one all the time.
Common Causes
  • Low Fuel Pressure
  • Vacuum Leak
  • EGR system malfunction
  • Internal Engine Problems (such as low compression)
Less Common Causes
  • Faulty Coil
  • Faulty Spark Plugs and/or Wires
  • Camshaft or Crankshaft sensors
  • Ignition module
  • Computer

Jun 12, 2014 | 1998 Chevrolet Tahoe

1 Answer

Engine runs rough and vsc light comes on and check engine flashes


flashing engine light means you have a misfire or multiple misfire which is enough to cause catalist damage. You have not given the make, model or engine size of vehicle, but this would apply to all.

Jan 26, 2014 | Cars & Trucks

1 Answer

2005 f150 5.4L misfire on multiple cyl check engine light flashing loss of power. seems to be running on only 3 cyl


THIS JUST HAPPENED TO MY 5.4. HAD IT PUT ON COMPUTER TO FIND OUT WHICH CYL'S WAS MISFIRING, AND REPLACED THE COIL PACKS ON THOSE CYL'S. THIS FIXED MY PROBLEM. IT WAS AN EASY FIX BUT EACH COIL PACK IS AROUND 50$, AND EACH CYL. HAS ITS OWN SO THERE IS 8 ON OUR ENGINE NOT A CHEAP FIX. NOT GOOD TO TRY TO DRIVE WHEN ENGINE LIGHT IS FLASHING WAS TOLD THIS CAN CAUSE CATASTROPHIC DAMAGE TO THE ENGINE. HOPE THIS HELPS, AND GOOD LUCK.

Dec 29, 2010 | 2005 Ford F-150

3 Answers

Hard shifting, ilding rough check engine light flashing


If the CK ENG light is flashing, that means its running bad enough to damage the cat converter. Have that checked ASAP.

Nov 23, 2009 | 2003 Chevrolet Silverado 1500

1 Answer

2004 Neon SXT cylinder misfire


TRY REPLACING THE CRANKSHAFT POSITION SENSOR..HAVE SEEN THESE CAUSE MISFIRES AND LOW VOLTAGE DTCS AS PCM THINKS VEHICLE IS NOT RUNNING..ALTERNATOR MAY NOT BE PUTTING OUT PROPERLY

Jul 05, 2009 | 2004 Dodge Neon

2 Answers

I have a 2002 Ford Explorer V6. Last night I


I somewhat agree with other solutions on this page. I agree that what you are describing is a severe misfire, however there are MANY possible causes for a severe misfire other than just the spark plugs...I recommend diagnosing the CAUSE of the misfire before spending any money "GUESSING" and replacing a bunch of parts.

Also, a code P0300 is a "RANDOM MISFIRE" code which indicates that there is definately more than one cylinder misfiring. Your computer MAY display this code, however, a SINGLE cylinder misfire can also cause a loss of power and the check engine light to flash.
You may just have something like a bad coil on one cylinder that needs to be replaced. This is why PROPER diagnosis is recommended.

Jun 30, 2009 | 2002 Ford Explorer

1 Answer

1999 Nisian Maxima and need to know what codes mean?


P1320 Ignition Signal
Signal wire from distributor
P0325 Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
O2 senor ( The one before the cat converter )
P0300 Random/Multiple Cylinder Misfire Detected
The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the specific cylinder in which the misfire has occurred. A misfire is nothing more than a lack of combustion, which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. There are other possible, less obvious causes as well, such as uncommanded Exhaust Gas Recirculatin (EGR), flow. When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.
Possible Causes:
Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect fuel pressure

EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Apr 13, 2009 | 1999 Nissan Maxima

1 Answer

Engine light comes on - Code shows P0300 and then


OBD II 300 Random/Multiple Cylinder Misfire Detected

When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Apr 04, 2009 | 1996 Dodge Ram 1500 Club Cab

1 Answer

Chech engine light code OMDII 300 vehicle back fires from stand still till speed 35 to 40 mhp 1998 corolla can you help


OBD II 300 Random/Multiple Cylinder Misfire Detected

When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

Mar 24, 2009 | 1998 Toyota Corolla

1 Answer

Looking for cylinder diagram/location on 2001 Ford Escape 6 cyl


here's the scoop. There is a TSB that addresses this issue.
First, replace the spark plugs.
Next, replace all 6 COPS, coil on plug. You have to because they feed back into the PCM, Powertrain Control Module and blow the drivers. Then you need to replace the PCM.

This was for 2004-06, but it might apply to yours if it's a 3.0L.
buy at tascafordparts.com.

Misfire DTC codes identify which cylinder is misfiring.

Misfire Detection Monitor The Misfire Detection Monitor is an on-board strategy designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. The Misfire Detection Monitor will be enabled only when certain base engine conditions are first satisfied. Input from the ECT or CHT, MAF and CKP sensors is required to enable the monitor. The Misfire Detection Monitor is also performed during on demand self-test.
  1. The PCM synchronized ignition spark is based on information received from the CKP sensor. The CKP signal generated is also the main input used in determining cylinder misfire.
  1. The input signal generated by the CKP sensor is derived by sensing the passage of teeth from the crankshaft position wheel mounted on the end of the crankshaft.
  1. The input signal to the PCM is then used to calculate the time between CKP edges and also crankshaft rotational velocity and acceleration. By comparing the accelerations of each cylinder event, the power loss of each cylinder is determined. When the power loss of a particular cylinder is sufficiently less than a calibrated value and other criteria is met, then the suspect cylinder is determined to have misfired.
  1. Misfire type A:

    Upon detection of a Misfire type A (200 revolutions) which would cause catalyst damage, the MIL will blink once per second during the actual misfire, and a DTC will be stored.

    Misfire type B:

    Upon detection of a Misfire type B (1000 revolutions) which will exceed the emissions threshold or cause a vehicle to fail an inspection and maintenance tailpipe emissions test, the MIL will illuminate and a DTC will be stored.

    The DTC associated with multiple cylinder misfire for a Type A or Type B misfire is DTC P0300.

    The DTCs associated with an individual cylinder misfire for a Type A or Type B misfire are DTCs P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309 and P0310.

Dec 18, 2008 | 2001 Ford Escape

Not finding what you are looking for?
2002 Ford Expedition Logo

129 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

76691 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

fordexpert

Level 3 Expert

5537 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...