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Hi I picked up a 2002 a ford excursion with a misfire computer says ignition coil so I did that replaced all 8 and plugs sill still has misfire engine has 117.000 miles on it and put a fuel filter

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Misfires are also from problem injectors and low fuel pressure
the code would have stated which cylinder was misfiring to identify the injector at fault
read the codes again and post the code found

Posted on Dec 19, 2016

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I have a 2003 ford cv with a misfire on cylinder 6; THIS IS WHAT I change,new coil 5,6 new fuel injector 5,6 all 8 spark plug! Still the check engine light comes on .


code p 0306 refers to cylinder 6-- misfire detected ====causes --engine mechanical fault--wiring---ignition/fuel system--injector---ECT/MAF sensor---ECM
the mechanical fault can be
problem hydraulic lifter holding a valve partially open
loose valve seat insert
a compression test will determine if there is a mechanical problem as for the rest , check all connections for clean /tight terminals
substitute the ECM with a know good unit to eliminate it
substitute the ECT/MAF sensor with a known good unit
run the fault codes again as engine lights report on a variety of faults as well as the transmission faults

Dec 10, 2016 | Ford Cars & Trucks

1 Answer

Both coils do not fire on 1 and 4. Will start but only running on 2 cylinders. Could both coils be bad or should I look elsewhere?


Part 3 -How to Test the Ignition Module and Crank Sensor ...

easyautodiagnostics.com > Ford > 2.3L
Mar 1, 2012 - Spark plugs for cylinders #2 and #3 get spark at the exact same time. ...voltage -12 Volts) to both individual ignition coils within the coil pack. ... Ford Mustang or Ranger (or 2.3L Mazda B2300), this is what you'll need ... for this 'Switching Signal' at the coil pack... but you can also test this ... 1991, 1992, 1993.

How to Diagnose a Misfiring Cylinder (2.3L Ford Ranger ...

troubleshootmyvehicle.com > Ford > 2.3L
Apr 3, 2012 - Bad Fuel Injectors can cause a Misfire Condition. ... the ignition system on the 2.3L Ford Mustang or Ranger consists of 2 ignition coil packs, ...

2002 ranger misfire rough idle - Discussion on Topix

www.topix.com > Ford Ranger
Jul 27, 2007 - My truck is giving the code misfire in number 4 cyl. I replaced my spark plugs, Wires, Coil packs (both of them) and all my fuil ... three (3.0L v6) go bad, the fuel/air mixture gets messed up. Judged: 2. 2 ... My truck runs rough only at idle. ...code for ford ranger 2002, 2.3 5speed. truck runs like a champ but that ...

Extremely stumped! I need the best and brightest 1994 Ford ...

answers.edmunds.com > Edmunds Answers

Jan 31, 2016 | Cars & Trucks

1 Answer

My 2002 ford escape is not shifting into drive but it's going into reverse and one of the sensors is misfiring?


Sensors don't misfire. Engine cylinders misfire. The most common cause of the misfre would be spark plugs and/or ignition coils on your vehicle. I have seen the igniion coils on Fords spike the computer and cause all kinds of problems including transmission codes. You should look into the misfire codes and repair them first before attempting to address any other codes.

Jan 16, 2011 | 2002 Ford Escape

1 Answer

308 code i change sparks ignition coil same problem


Code P0308 - Cylinder 8 Misfire Detected

Possible Causes:
- Improper spark plug at cylinder #8
- Insufficient compression at cylinder #8
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #8
- Fuel injector #8 may be faulty

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plug #8
- Replaced Injector #8
- Replaced Ignition Coil #8

Jan 14, 2011 | 2000 Ford Expedition

1 Answer

Ford focus 2002, 2 litres, what is the function of the pick up coil


The pick up coil is located at the base of the distributor and plugs into the ignition module. The pick up coil's purpose is to sense or "pick up" the pulses of the distributor and tell the ignition module when to fire the spark plugs. The most critical part of the replacement of the pick up coil is to make certain you properly mark the orientation of the distributor to the engine block and the rotor to the distributor base. When you successfully make these markings, you will not need to check your timing when this job is finished. Keeping this in mind, here we go: You will need to purchase a replacement pickup coil and a rubber o-ring gasket that will replace the o-ring located where the distributor shaft enters the engine before you start this project.

Dec 05, 2010 | 2002 Ford SVT Focus

1 Answer

There is a misfire in my engine, changed plugs & wires. now it reads that the fuel leveling sensor is bad, will this help?


If there is a misfire, the cylinder that it is misfiring in will be recorded as a code in the computer.

Have the car scanned to determine which cylinder is bad. Then, replace the coil pack going to that cylinder.

Ignition Coil Pack Removal & Installation 2V Engine To Remove:
  1. Twist the spark plug wires off of the ignition coil towers. Mark the spark plug wire positions so they can be installed in their original positions.
  2. Disconnect the electrical connector from the ignition coil. CAUTION
    When removing the spark plug wires, a slight twisting motion will break the seal and ease removal.
    coilconn.gif

  3. Remove the mounting screws and remove the ignition coil.
To Install:
  1. Position the ignition coil pack on engine.
  2. Install mounting screws and torque to 53 in-lbs. (6 Nm). coilbolt.gif

  3. Connect ignition coil pack electrical connector.
  4. Match previously marked spark plug wires to ignition coil and install.
4V Engine To Remove:
  1. Remove the RH cowl grille cowlpic.gif
  2. Remove the screws and the water shield
  3. Mark spark plug wire positions
  4. Disconnect the spark plug wires from the ignition coil CAUTION
    When removing the spark plug wires a slight twisting motion will break the seal and ease removal.
  5. Disconnect the ignition coil electrical connector coilconn.gif

  6. Remove the mounting screws and remove the ignition coil
To Install:
  1. Position ignition coil pack. Install mounting screws and torque to 56 in-lbs. (6Nm)
    coilbolt.gif

  2. Connect ignition coil pack electrical connector
  3. Match previously marked spark plug wires to ignition coil and install
  4. Position water shield and install screws
  5. Install RH cowl panel
prev.gif next.gif

Aug 11, 2010 | 2002 Ford Taurus

1 Answer

Engine Performance problem 2002 Ford F150 V8


Hello Bret.
These codes are indicating engine misfires. 303 is cylinder #3 and 304 is cylinder #4. The 316 indicates that the misfire happened in the first 1000 revolutions.
These trucks are notorious for misfires. The most common issue is ignition coil failure. Failure on these coils can be accelerated though by spark plugs that are worn and contamination from oils, antifreeze leaks and water.
If it has been some time since you have replaced the spark plugs this may be an opportune time to do so. This job isn't for the faint of heart or those with little patience. Some of the coils and plugs are difficult to access, especially #7 and # 8. I also recommend torquing the spark plugs properly as there are some thread stripping issues on the spark plug threads with these engines.
Have at least 2 new coil assembly's for the two cylinders that are misfiring and be prepared to find at least one more that looks poor. I have used some aftermarket coils but have had issues with them. Ford has reduced the price on their coils to reflect a more fair market value so I would use those.
Have a look for any contamination issues and repair those to prevent future problems.
Hope this helps you along.

Nov 21, 2009 | Ford F-150 Cars & Trucks

3 Answers

Ignition Distributor location


There is no cap and rotor, as the vehicles igntion system is DIS (digital ignition system). The recommended tune-up on these motors require sparkplug and coil replacement. The coil type in this vehicle is COPs (coil over plugs). Usually moist and oxidation develope on the sparkplug chamber walls from faulty or worn coil boots. This causes the coil to short, they must be replaced at 75,000 miles at the same time the sparkplugs are replaced. Typical symtoms are: Vehicle stalls (restarts and runs normal), intermitted jerks/sputter while driving, misfires, rough idle, severe power loss. Hopefully this helps

Sep 01, 2009 | 1997 Ford Expedition

2 Answers

2002 ford windstar misfire!!!


Hello

Check your ignition components, spark plugs, wires, if they are in good shape. Check with Ford technical service bulletins. There is a TSB for the upper intake plenum gaskets leaking when engine is cold. The TSB also has a reflash for the Engine Control Module.. I tried just doing the upper intake gaskets and so far so good. The reflash (reprogram your original computer) has to be done at the dealer. Hope this helps..

Apr 07, 2009 | 2005 Renault 18I

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