Question about 2000 Mercury Sable

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PO401 I had the same problem at 78K miles and replaced all EGR related items, plugs, and wires but problem persisted. Ended up being an ignition coil problem. Replaced the ignition coil, not small feat as very difficult to get to, and it runs like a charm.

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Sounds like the DPFE sensor is bad they have a tendency to bulid up moisture inside

Posted on Jun 05, 2009

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P0303 Flashing Service Engine Light when driving


P0303 ignition misfire on cylinder #3.
Possible Causes:

1.Fuel injectors, related wiring, sensors, computer issues
2. Running out of gas, or poor fuel quality
3. Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
4. Incorrect Fuel Pressure
5. EGR system concerns: leaking EGR valve or restricted ports
6.Base engine concerns: low compression, valve train problems and timing issues
7. 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

You will have diagnose each element until you find root cause.
And it could be more than one element faulting out.
You

Jan 27, 2015 | 2002 Nissan Pathfinder

2 Answers

Random misfire


Have the fault codes read. Replace faulty items. Use only
genuine items as replacement as non-genuine are not always compatible with the OEM fitted CPU units. This results in the fault codes not cancelling out. Pay attention to ignition coils problem Wiring connectors.

May 19, 2013 | 2005 Mitsubishi Montero Limited

1 Answer

My 2004 Kia Rio w/161,000 miles is missing on the #1 and 4 cylinders. I've had the ignition coil, spark plugs, spark plug wires replaced, yet the problem persists. Sometimes, the car runs good for a f


The car computer does the firing of the spark plugs based on info provided to it by various sensors in car. Your mechanic is spot on. Ouch!

Jun 20, 2017 | 2004 Kia Rio

1 Answer

My 98 sonoma truck runs but lacks power with service engine soon light on .trouble code reads po300 cylinder misfire detected (random) what dose this mean


See also: P0300 diagnostic code @ OBD-Codes.com
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 13, 2011 | GMC Sonoma Cars & Trucks

1 Answer

Have a p301, p305 codes (misfires) and p401, Engine runs really rough. 120000 and never changed spark plugs. Could a simple tune up fix this. Also replaced the egr back pressure sensor. What else could...


It is most likely an ignition system problem so starting by replacing the spark plugs and wires ia advisable.

If the problem persists then have the ignition module, and coil packs tested.

Feb 03, 2011 | 2002 Mercury Mountaineer

1 Answer

2000 Buick LeSabre Will not start Replaced cam


Multiple engine misfire is related to the coils and the ignition control module. I have a 2002 with the 3.8 engine. It has three coils. I just went through this problem. I bought one coil and tried it in each position with no improvement. It was the ignition control module. Mine is located under the three coils. A relatively easy item to replace. Cost about $140.

Apr 18, 2010 | 2000 Buick LeSabre

1 Answer

Car was shaking and shimmying between 60 and 80 brought car home now it dies when you shift in to gear car will idle fine but as soon as it goes into reverse thats it


I just went thru something like this with my Buick Lesabre with 120,000 miles. It ended up bing the ignition control module. I was getting a code of P0300 - Random engine misfiring. There are other reasons like plugs, plug wires, coil, etc. I changed plugs, plug wires and checked the coils and ended up with it ICM. Costs abot $140. It was very easy to replace on my car. It is under the 3 coils on my 3.8 liter engine.

Mar 16, 2010 | Buick Regal Cars & Trucks

1 Answer

Error code p0301 and p0306


The code 0300 is a mis-fire code. It means at one point a cylinder has mis-fired. When you are given the the code 0301 it points to the # 1 cylinder, 0306 is # 6 cylinder. Here is a long list of what these codes could mean as far as diagnosing the problem :

-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
-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
You will have to determine which or may be several, of these items to check out.
Please let me know what you find.

Feb 11, 2010 | 2001 Ford F150 Styleside SuperCrew

1 Answer

New plugs an wires,coilpak what else could


This is the only possible ideas I can thing of :

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 module or related wiring issues
Ignition related sensor faults or wiring issues

I know you did these two things:
Faulty spark plugs
Faulty coil or related wiring

Apr 14, 2009 | 1998 Ford F150 Regular Cab

1 Answer

Honda Misses.


Pin point the dead hole and check that injector.

Dec 23, 2008 | 1995 Honda Accord

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