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Ford F150 2001 - Codes PO300, PO350, PO351 Replaced Coil and plug on cylinder 1 - erased the codes. Codes came back and is running rough. Could there be a ground wire loose somewhere?

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Posted on Jan 02, 2017


SOURCE: Engine sputter

2002 linclon ls 3.0 v6 pcv location

Posted on Jul 17, 2008

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SOURCE: 1999 Town Car began running very rough - suddenly.

When cleaning your engine, water/degreaser went down the spark plug ports. Try using a air compressor blow gun to remove the moisture from around the spark plugs and boots. The water was causing the engine to misfire on 3 cylinders at first and as the ports started to evaporate the moisture, the less misfiring was occuring. Dry thouroughly and hopefully coils do not have damage to them. Also check to make sure the boot is making good contact with the spark plug.

Posted on Apr 09, 2009

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SOURCE: Check Engine Light is on and the code is P0303

Hello I need a help.
I have 1999 lincoln town car 4.6L V8.They have check engine light on. P 0303 cylinder 3 missfire.
I was changed spark plugs,fuel filter. check compression test 150psi. fuel pressuer 50.
swiching cylinder 1 to 3 fuel injector and coil. but they still have engine code

Posted on Apr 12, 2009

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I assume this has 8 coils,the one you are checking,is it the right one,have you located the exact cylinder miss fire?I believe,if I am not wrong,it has two coils per cylinder,It is showing this on the code.It is the primary coil,coil A ,the secondary coil is not showing up,any way, it is showing that the boot on the coil is leaking,and not sparking the spark plug.Let me know if I can help.

Posted on Nov 20, 2009

  • 753 Answers

SOURCE: lincoln ls has a trouble code p1336 and po350

P0350 is Ignition coil primary/secondary circuit malfunction,could be faulty igntion coil or module.P1336 is crankshaft position system variation not learned.This is done with a Tech2 at your local dealership you would be best served taking this car to your dealer to have it diagnoised.

Posted on Jan 11, 2010

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1 Answer

My 2001 dodge Dakota is running rough and the check engine light is on.

You'll have to look up the actual procedure to test the coil for code 351. The code means the computer is not able to fire the coil on demand which could be caused by several things, including a faulty computer. It could also be a problem with the wiring between the coil and the computer.

Feb 17, 2015 | Dodge Cars & Trucks

1 Answer

2001 windstar im getting codes po172 po174 po301 po302 po 303 po304 po300 installed new coil pack twice new wires,plugs,cam and crank sensors,fuel andair filters,pcv valve and now get these codes. ...

Get your ECM replaced. Usually it's next to battery or inside front fenders. The rain must have shorted out connections and fried ECM. Engine will sputter until it is done. Usually autozone, advance auto, or dealer has ECM.

Apr 14, 2014 | 2001 Ford Windstar

1 Answer

P0351 code

Codes for ignition coils are not always accurate

You can get many codes for many cylinders & have one or more
bad coils

I would do a cylinder leak down test, to eliminate a mechanical
valve sealing issue

Then if all valves seal-- smoke the intake for vacuum leaks

PO301,PO351 or Coil A -- are all the same-- cylinder #1

Mar 25, 2014 | Ford Escort Cars & Trucks

1 Answer

PO300 code

Code 300 means you have a random miss that is not serious enough to pick one cylinder. The computer measures RPM on each cylinder as the plug fires. So it is not that a cylinder is not firing but rather that it is not producing enough power.
Other causes are vac leaks and lack of fuel.

Aug 06, 2013 | 2004 Chevrolet TrailBlazer

3 Answers


P0301 - Cylinder 1 Misfire Detected.

- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.

Jan 17, 2011 | 2002 Mercury Sable

2 Answers

Code po351 replaced coil and plug on second cylender frm front on passenger side still missing bad.please help.only car

It's probably the 4th which is all the way in the back on the left side when you are standing in front of the vehicle facing the engine. There is a water line that runs above that cylinder and drips condensation into it allowing for problems. It's best to replace the plugs AND the (coil pack--which run $60 each).

Sep 16, 2010 | 1997 Ford Expedition

1 Answer

I have a 2003 Chrysler Voyager mini van and the engine light is on and it's running rough. I'm getting several error codes from the engine light. PO351, PO300, 301, 304, PO442 and PO455.

wow a lot of codes, lets start with them....

P0351 ignition coil A primary/ secondary curcuit

P0300 random misfire detected

P0301 Cylinder 1 misfire detected

P0304 Cylinder 4 misfire detected

P0442 Evaporative emissions leak detected (small)

P0445 Evaporative Emissions System Purge control valve circuit shorted

I guess the first thing i would do, is insure that all the maintenance on this vehicle was up to date. Do an oil change and a tune up. Make sure you use decent spark plugs as a fouled plug or bad oil could cause a misfire. After you do the tune up, try running it some more, if the problem persist, you may end up having to replace the coil.

The evaporate emission leaks. These, especially the the 442 can be either a loose gas cap or a small leak in the vacume system. Insure the cap is tight passed several clicks and listen the the motor as it runs and try to hear any leaks. If you find a leak replace the faulty lines. Also inspect the vacume line for cracks and breaks.

Wish you luck, we are hear if you need more help. Thanks for coming to FixYa!!

Mar 26, 2010 | 2003 Chrysler Voyager

1 Answer

Cylinder Misfires

It could be your spark plugs or a coil. To see if it's a coil move the coil from #5 to #6 the miss will change to that cylinder with code p0306 and change #1 to #3 and see if it changes to p0303. If it does replace all the coils. You change all coil because if one or two go you know the rest are not far behind

Aug 07, 2009 | 2005 Honda Accord

1 Answer

Po300 code, replaced 1 crank sensor needing to know voltage on se

Resistance check the coils. Check for spark on all 6 cylinders.

Apr 02, 2009 | 1999 Pontiac Grand Am GT

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