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I've got a 2003 Expedition, that started running rough the other day, and the "check engine soon" light came on. I went by Auto Zone, and they hooked up the diag machine (OBD II I think). The read out stated that cylender 6 was misfiring and that all other cylenders were randomly missfiring. I thought ignition module, but there ain't one. Anybody got any thought? Are there any recalls or service bulletin I should be aware of?

Thanks in advance,

Red
 
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NCRedNeck said:
I've got a 2003 Expedition, that started running rough the other day, and the "check engine soon" light came on. I went by Auto Zone, and they hooked up the diag machine (OBD II I think). The read out stated that cylender 6 was misfiring and that all other cylenders were randomly missfiring. I thought ignition module, but there ain't one. Anybody got any thought? Are there any recalls or service bulletin I should be aware of?

Thanks in advance,

Red



save yourself from having another problem by staying away from auto zone
 

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NCREDNECK,,i have the same problem with my 1997 4.6 f-150 and i posted it on here and never did get a response from anyone,maybe we are the the only one thats had this problem.mine started running rough and still runs rough after new tuneup,complete fuel system flush.new air filters,new fuel filters,plentum gasket,whatever someone said it was i had it done,,,, i still got a bad miss,the other day i went about 10 miles not a single miss,,then i stopped for a stopsign,and took off and it started missing and still is,,,i dont know what to do,,,ill let you know if i get mine figured out.
 

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This has just happened with my wifes 98 expedition with the 5.4 ltr triton. More then likely you have moisture (i spelt that wrong i think) within your coil packs or a possible a bad fuel injector. 1 st we changed plugs thinking it was that but then it gotten worse. Unfortunately for her, 3 fuel injectors had went bad along with three coil packs (moisture). After $480.00 later. All was well. It'll be one of those 2 things.
 
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Hello, Im in the same boat here. I have a 1999 expedition 4.6 113000 miles and I have replaced plugs(twice) wires (twice) both coil packs and 1 injector (#2), some days I have the miss more ofter, others less often.... It does feel like I have lost some power though. I still get the sputter and error code of PO302 all the time, I have it erased and its back the next day. It doesnt burn any oil and no water useage.(leaky heads) Any help would be great ! Thanks in advance !
 
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Well being a Ford/Lincoln tech I think I may be of some help. Most likely you have a bad coil.. although the chances of it are high that it is #6 for your P0306, its not always that way. Sometimes when a coil goes bad it emittes whats called RFI or radio frequency interference. In other word, your computer or PCM, controlles your coils and everythin else on the engine. When a coil emmites a strong enough "radio signal" from the charge and discharge of the coil, it can make the PCM go crazy and make other cylinders misfire. I have seen coils make the vehicles stall out for no reason etc. But more times than not its just that #6 coil.

The response about the vacuum leak although they do experience those leaks, it wont cause that misfire and your code would have been accompanied with a P0171, and or a P0174, lean codes.

Then there is the possibility of having a burnt valve. A burnt valve will cause your P0306 but generally you would notice a constant skip and it wouldnt be random.

Hope this helps
 

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I have used these forums extensively. Let Autozone or whomever diagnose the problem for free, beats paying for it! .....

I was getting the same errors. P0306, Spark misfires, Ignition Coil Misfires and others. I have a 2003 Exp. Eddie Bauer with 70,000 miles. I just replaced all coil packs, spark plugs and ICM (Ignition Control Module). I also had to replace a dying battery. In the past, I was replacing a plug coil here and there. It would last for a while then the same rough idle and service engine light. I am fortunate enough to have a brother in law who runs a parts distribution warehouse. But check Ebay and other online sites to save money.

After completing all the work, my engine was running really rough. I double checked everything and had loosened my PCV vacuum hose. After reconnecting everything, the engine ran a little better.

I finally corrected the rough idle after disconnecting the battery and all three connections to the Control Module on the firewall passenger side (EEC). That reset the computer. After I hooked everything back up the truck runs smooth as ever. I don't know if I made a mistake by swapping batteries while the truck was running. Shadetree Mechanics at its finest.....

Anyway, here are the codes if anyone needs them.

P0102 Mass Air Flow circuit Low Input.
P0103 Mass Air Flow circuit High Input.
P0106 EGR Barometric Pressure Sensor Input Signal is out of Self-Test Range.
P0107 EGR/BARO Signal circuit is Less Than Self-Test minimum.
P0108 EGR Barometric Pressure Sensor Input Signal is out of Self-Test Range.
P0112 Intake Air Temperature circuit Low Input.
P0113 Intake Air Temperature circuit High Input.
P0117 Engine Coolant Temperature circuit Low Input.
P0118 Engine Coolant Temperature circuit High Input.
P0121 In-Range Operating Throttle Position Sensor circuit failure.
P0122 Throttle Position Sensor circuit Low Input.
P0123 Throttle Position Sensor circuit High Input.
P0125 Insufficient Coolant Temperature to enter Closed Loop.
P0126 Insufficient Coolant Temperature for Stable Operation.
P0131 Upstream Heated Oxygen Sensor circuit out of range - Bank No. 1.
P0132 Upstream Heated Oxygen Sensor circuit Voltage High - Bank No. 1.
P0133 Upstream Heated Oxygen Sensor circuit Slow Response - Bank No. 1.
P0135 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1.
P0136 Downstream Heated Oxygen Sensor circuit fault - Bank No. 1.
P0138 Downstream Heated Oxygen Sensor circuit Voltage High - Bank No. 1.
P0140 Downstream Heated Oxygen Sensor circuit Faulty - Bank No. 1.
P0141 Downstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1.
P0151 Upstream Heated Oxygen Sensor circuit out of range - Bank No. 2.
P0152 Upstream Heated Oxygen Sensor circuit Voltage High - Bank No. 2.
P0153 Upstream Heated Oxygen Sensor circuit Slow Response - Bank No. 2.
P0155 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 2.
P0156 Downstream Heated Oxygen Sensor circuit fault - Bank No. 2.
P0158 Downstream Heated Oxygen Sensor circuit Voltage High - Bank No. 2.
P0160 Downstream Heated Oxygen Sensor circuit fault - Bank No. 2.
P0161 Downstream Heated Oxygen Sensor Heater circuit fault - Bank No. 2.
P0171 System Too Lean - Bank No. 1.
P0172 System Too Rich - Bank No. 1.
P0174 System Too Lean - Bank No. 2.
P0175 System Too Rich - Bank No. 2.
P0176 Flexible Fuel Sensor.
P0180 Engine Fuel Temperature Sensor circuit - Electrical fault.
P0181 Engine Fuel Temperature Sensor circuit - Electrical fault.
P0182 Engine Fuel Temperature Sensor circuit - Electrical fault.
P0183 Engine Fuel Temperature Sensor circuit - Electrical fault.
P0187 Engine Fuel Temperature Sensor circuit.
P0188 Engine Fuel Temperature Sensor circuit.
P0190 FRP Sensor Signal Low.
P0191 Engine Fuel Temperature Sensor circuit.
P0192 Engine Fuel Temperature Sensor circuit .
P0193 Engine Fuel Temperature Sensor circuit.
P0222 Throttle Position Sensor B circuit Input Low.
P0223 Throttle Position Sensor B circuit Input High.
P0230 Fuel Pump Primary circuit fault.
P0231 Fuel Pump Secondary circuit Low.
P0232 Fuel Pump Secondary circuit High.
P0300 Random Misfire Detected.
P0301 Misfire Detected - Cylinders 1-10.
P0302 Misfire Detected - Cylinders 1-10.
P0303 Misfire Detected - Cylinders 1-10.
P0304 Misfire Detected - Cylinders 1-10.
P0305 Misfire Detected - Cylinders 1-10.
P0306 Misfire Detected - Cylinders 1-10.
P0307 Misfire Detected - Cylinders 1-10.
P0308 Misfire Detected - Cylinders 1-10.
P0309 Misfire Detected - Cylinders 1-10.
P0310 Misfire Detected - Cylinders 1-10.
P0320 Ignition Engine Speed (PIP) Input circuit fault.
P0325 A Spark Knock Occurred - Sensor Circuitry did not respond.
P0326 Spark Knock has not been sensed.
P0330 A Spark Knock occurred - Sensor Circuitry did not respond.
P0331 Spark Knock has not been sensed.
P0340 Camshaft Position Sensor circuit fault.
P0350 Ignition Coil Primary circuit fault.
P0351 Ignition Coil A Primary circuit fault.
P0352 Ignition Coil B Primary circuit fault.
P0353 Ignition Coil C Primary circuit fault.
P0354 Ignition Coil D Primary circuit fault.
P0355 Ignition Coil Primary circuit malfunction.
P0356 Ignition Coil Primary circuit malfunction.
P0357 Ignition Coil Primary circuit malfunction.
P0358 Ignition Coil Primary circuit malfunction.
P0359 Integrated Ignition On Plug failure.
P0360 Integrated Ignition On Plug failure.
P0385 Misfire Detection Sensor circuit failure.
P0400 EGR Flow Faulty.
P0401 Insufficient EGR Flow.
P0402 EGR Flow Excessive at Idle.
P0411 Secondary Air Injection System Flow Improper.
P0412 Secondary Air Injection System Control Valve Faulty.
P0413 Secondary Air Injection Solenoid did not change when activated.
P0414 Secondary Air Injection Solenoid did not change when activated.
P0416 Secondary Air Injection Solenoid did not change when activated.
P0417 Secondary Air Injection Solenoid did not change when activated.
P0420 Catalyst System Efficiency below Limit - Bank No 1.
P0421 Catalyst System Efficiency below Limit - Bank No 1.
P0430 Catalyst System Efficiency below Limit - Bank No 2.
P0431 Catalyst System Efficiency below Limit - Bank No 2.
P0440 Evaporative Emission Purge Control Solenoid Damaged.
P0442 Leak in Evaporative System Detected.
P0443 EVAP Canister Purge Control Solenoid or Valve Faulty.
P0446 Evaporative Emission Control System Vent Control malfunction.
P0452 Fuel Tank Pressure Signal circuit Input below minimum.
P0453 Fuel Tank Pressure Signal circuit Input above maximum.
P0455 Leak or Blockage Detected in Evaporative Emission Control System.
P0460 Fuel Level Input circuit malfunction.
P0500 Vehicle Speed Sensor fault.
P0501 Vehicle Speed Sensor fault.
P0503 Poor Vehicle Speed Sensor Performance.
P0505 Idle Air Control Valve System fault.
P0552 Power Steering Pressure Sensor Shorted to Power.
P0553 Power Steering Pressure Sensor Shorted to Power.
P0602 Replace PCM.
P0603 PCM has Experienced Power Interrupt.
P0605 PCM Read Only Memory Error.
P0703 Brake On/Off Switch Input fault.
P0704 Clutch Pedal Position Switch Input circuit fault.
P0705 Transmission Range Sensor out of Self-Test Range or Shorted to Ground.
P0707 Transmission Range Sensor circuit Low Input.
P0708 Transmission Range Sensor circuit High Input.
P0712 Transmission Fluid Temperature Sensor circuit Input Low.
P0713 Transmission Fluid Temperature Sensor circuit Input High.
P0715 Turbine Shaft Speed Sensor circuit fault.
P0720 Output Shaft Speed Sensor circuit.
P0721 Output Shaft Speed Sensor circuit.
P0731 Improper Ratio for First Gear.
P0732 Improper Ratio for Second Gear.
P0733 Improper Ratio for Third Gear.
P0734 Improper Ratio for Fourth Gear.
P0735 Transmission problems.
P0736 Improper Ratio for Reverse Gear.
P0741 TCC System Improper Mechanical Performance.
P0743 Torque Converter Clutch System Electrical failure.
P0746 Electronic Pressure Control Solenoid Performance.
P0750 Shift Solenoid No. 1 circuit.
P0751 Shift Solenoid No. 1 Performance.
P0755 Shift Solenoid No. 2 circuit.
P0756 Shift Solenoid No. 2 Performance.
P0760 Shift Solenoid No. 3 circuit.
P0761 Shift Solenoid No. 3 Performance.
70765 Transmission system problems.
P0781 1 to 2 Shift Error.
P0782 2 to 3 Shift Error.
P0783 3 to 4 Shift Error.
P0784 4 to 5 Shift Error.
 

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Update:
After replacing ICM (Ignition Control Module) in May. Plugs in June, Coils Packs in July, checking for vacuum leaks.... The truck ran great until yesterday. Now I am Idling rough. Most of the other misfires were at running speeds.

Should I have replaced everything at once?

I am really frustrated.....
 

· roadking9960
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I have had intermittent rough running. I have, at those times, suspected it was transmission related, along with others. I also recently had intermittent starting problems. Mostly in the morning is when it would happen. Also it has been very cold here, around 0*. So thinking the battery I changed it. The problem did not go away. So the next thing I tryed was the connections. At the battery, the relay (behind the battery on the firewall), the starter & solonoid (why oh why did Ford put the solonoid down there!!!), AND, now here is the longshot, I cleaned the ground connections to the fire wall, which I belive may help all the crap they now put on cars, like sensors and whatnot.
My truck is running good right now, but time will tell........ Good luck to all.
 

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i have a 2002 ford f-150, check engine light came on codes read 1131 and 1151 lack of upstrea heated oxygen sensor switch, sensor indicates lean on bank 1 and bank 2 can anyone tell me what this means or what to do, thank so much theresa
 

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"Then there is the possibility of having a burnt valve. A burnt valve will cause your P0306 but generally you would notice a constant skip and it wouldnt be random."

What exactly is a burnt valve? How does this happen and how does it affect the engine?

I had a P0303 code after all kinds of misfiring but luckily it cleared on it's own somehow. But I've never felt the engine ran smooth or as well as my friends who have the 5.4 engine. I'm wondering if resetting the computer by disconnecting everything would help??????
 

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I have an '03 expedition 5.4L Eddie Bauer and it has a misfire that originally happened only while pulling hills, but now it happens when ever it feels like it. Also, in the beginning the service engine soon light didn't come on, and now it comes on when the miss is real bad, but not when it is hardly noticeable. I wish this was a recall item, because I don't want to spend all the money that other guy has had to spend.
 

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have any of you checked the vacuum hose connection to the IAC (Idle Air Control) Valve? My '98 EB Expedition was hard to start and ran really rough. I secured/sealed the hose to the IAC (with some RTV and a wire-tie) and the truck has been running great since. It has 120,000 miles and runs great just like the day we got it. I recently changed the spark plugs on it and have never had to replace a coil pack. For those of you wondering, the vacuum hose to the IAC valve is centered located as far back as you can reach near the top of the engine. It is approximatly 1/2" in diameter, and has a 90 degree elbow on it that looks similar to a small engine spark plug boot. Your hand will pretty much be touching the firewall when you get to it. You'll probably have to stand on a chair and lean over the engine bay to get to it. Make sure it's not loose. The intermittent rough idle could be caused if the hose loosens up during vacuum changes throughout the RPM range. Please let me know if this helps anyone out.
 

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If you replace that many parts at once how are you going to know which one fixed the problem supposing the problem did get repaired. It's better to change one part and try it for a while if you have that option. I realize with computer controlled engines that are DTC that can be fixed by replacing several different parts, but it help when actually looking for the solution to replace parts one at a time.
 

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:help:I’m new to the Ford family. I bought a 97 f15 lariat with the 4.6 triton. I have a missfire in 7. How are the cylinders # . I thought from passenger side bumper back goes 1 2 3 4 driver side bumper back 5 6 7 8 . I changed the plug, still rough, checked to see if the plug was getting spark. Yes it is. Yes the miss is not there all the time, it started in a cold, wet day so I thought wires unplugged the hood bulb, and misted some h20 and saw no sparks. Anyone figured this mystery miss out yet. Thanks Anthony
 

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OK...Sorry to bring back this topic but I have issues and the wife is wanting me to fix it. Started off with a P0307 error. Had spark plug and coil replaced. A couple weeks later P0306, same thing. Now a P0302 error. Come on. What are the chances the same thing is happening across all the coils every couple weeks? Anything else I need to check. (I wasn't here when the first two went. I was in Hawaii while she was in NY). Any help here?

EDIT: 2003 Expedition with 5.4L
 
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