Question about 2004 Jeep Liberty

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Intermittent misfire on the number one cylinder

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Plugs or wires. if you have separate coils for each cylinder could also be that. injectors can cause misfire also, try getting injectors cleaned first

Posted on May 20, 2011

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I have intermittant shuddering and it idles rough (rpms jump up and down) and noticed poor gas mileage, 106,000 miles and I just had the fuel filter changed, but that did not take care of it. It is firing...


P0303 is misfire number 3 cylinder P0316 is misfire on startup,Go to the number 3 cylinder at idle listen for a vacuum leak like a rupture or disconnected vacuum line more than likely that is your problem you have

Jul 19, 2012 | 2004 Ford Escape

1 Answer

Misfire from cylinder 1 and fuel injection stuck open


One problem will cause another in this case. You can try to just change the fuel injector in the number 1 cylinder and see if the misfire straightens out.

You can use a test light to see if there is a pulse in the wire harness to the number 1 injector. Or there are plug-in lights which attach to the head of the injector harness to show firing of the injectors. Either way, th pulse should be a timed intermittent burst to that 1 cylinder when it is time to fire, just a spark goes to a sparkplug in intermittent bursts.

The crankshaft or camshaft sensor should send divided, pulsed signals to open the injector for fuel release. If the injector is jammed so that it does not go back to its seated position, you will get excessive fuel inside the engine when it is off. The fuel will bleed down into the crankcase and dilute the oil over time. This ruins an engine.

The fuel system normally remains pressurized and when the engine is turned off; the fuel will leak into the cylinder that is not shut. You may have to change the sparkplug as it can be gas-fouled by now. An oil change would be a good idea after you change the injector.

May 07, 2012 | 2004 Pontiac Grand Prix

1 Answer

Intermittent Skip under light acceleration


May still be a bad coil that just hasn't reached the number of misfires to set a trouble code.

Jul 28, 2017 | 2001 Lincoln Town Car

1 Answer

MAZDA CX-9 P0354 CODE


Cylinder 4. Each cylinder has it's own coil above the sparkplug.
If you have a misfire, it's probably a bad coil. But if it's an intermittent misfire, it may be the wiring to the coil. If it's intermittent, start the car and wiggle the wires to that coil. If you cause a misfire you need to check the wiring to the coil.
Goode luck.

Nov 29, 2011 | 2008 Mazda Cx 9

2 Answers

05 kia amanti with diagnostics codes p0350,p0320,p0300,p0302,p0303,p0304,p0305,p0306.skipping at times.when it does skip & misfire the rpm gauge goes crazy.this problem is not consitant


Generic OBD II Diagnostic Trouble Codes

DTC CODES P0300 to P0399

P0300....Random/Multiple Cylinder Misfire Detected

P0301....Cylinder 1 Misfire Detected

P0302....Cylinder 2 Misfire Detected

P0303....Cylinder 3 Misfire Detected

P0304....Cylinder 4 Misfire Detected

P0305....Cylinder 5 Misfire Detected

P0306....Cylinder 6 Misfire Detected

P0307....Cylinder 7 Misfire Detected

P0308....Cylinder 8 Misfire Detected

P0309....Cylinder 9 Misfire Detected

P0310....Cylinder 10....Misfire Detected

P0311....Cylinder 11 Misfire Detected

P0312....Cylinder 12 Misfire Detected

P0313....Misfire Detected with Low Fuel

P0314....Single Cylinder Misfire (Cylinder not Specified)

P0320....Ignition/Distributor Engine Speed Input Circuit

P0321....Ignition/Distributor Engine Speed Input Circuit Range/Performance

P0322....Ignition/Distributor Engine Speed Input Circuit No Signal

P0323....Ignition/Distributor Engine Speed Input Circuit Intermittent

P0324....Knock Control System Error

P0325....Knock Sensor 1 Circuit (Bank 1 or Single Sensor)

P0326....Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)

P0327....Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)

P0328....Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

P0329....Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor)

P0330....Knock Sensor 2 Circuit (Bank 2)

P0331....Knock Sensor 2 Circuit Range/Performance (Bank 2)

P0332....Knock Sensor 2 Circuit Low Input (Bank 2)

P0333....Knock Sensor 2 Circuit High Input (Bank 2)

P0334....Knock Sensor 2 Circuit Input Intermittent (Bank 2)

P0335....Crankshaft Position Sensor A Circuit

P0336....Crankshaft Position Sensor A Circuit Range/Performance

P0337....Crankshaft Position Sensor A Circuit Low Input

P0338....Crankshaft Position Sensor A Circuit High Input

P0339....Crankshaft Position Sensor A Circuit Intermittent

P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)

P0341 Camshaft Position Sensor 'A' Circuit Range/Performance (Bank 1 or Single Sensor)

P0342....Camshaft Position Sensor 'A' Circuit Low Input (Bank 1 or Single Sensor)

P0343....Camshaft Position Sensor 'A' Circuit High Input (Bank 1 or Single Sensor)

P0344....Camshaft Position Sensor 'A' Circuit Intermittent (Bank 1 or Single Sensor)

P0345....Camshaft Position Sensor 'A' Circuit (Bank 2)

P0346....Camshaft Position Sensor 'A' Circuit Range/Performance (Bank 2)

P0347....Camshaft Position Sensor 'A' Circuit Low Input (Bank 2)

P0348....Camshaft Position Sensor 'A' Circuit High Input (Bank 2)

P0349....Camshaft Position Sensor 'A' Circuit Intermittent (Bank 2)

P0350....Ignition Coil Primary/Secondary Circuit

Nov 17, 2010 | Kia Amanti Cars & Trucks

1 Answer

Cylinder 4 misfire, checked distributor, wires and plug. Seems intermittent, no oil in water or water in oil. Any ideas?


try switching stuff around move the number 4 plug to number 3, and the 3 to the 4 and give it a try, also check fuel injector

May have to do a compression test on cylinder 4

Apr 03, 2010 | 1998 Nissan 200SX

1 Answer

I am having ongoing problems with the truck miss firing and rough running. Timing is ok, replaced cap and rotor,coil. It still starts rough,idles rough and misses when at cruising speed,although it seems...


Misfire is a common driveability problem that may or may not be easy to diagnose, depending on the cause. A misfiring cylinder in a four-cylinder engine is, pardon the pun, hard to miss. The loss of 25% of the engine's power output is the equivalent of a horse trying to run on three legs. The engine may shake so badly at idle that it causes vibrations that can be felt in the steering wheel and throughout the vehicle. The engine also may be hard to start and may even stall at idle, depending on the accessory load (air conditioning, headlights and electric rear defroster, for example).

When misfire occurs, performance suffers along with fuel economy, emissions and idle quality. And, when a misfiring vehicle is subjected to an emissions test, it will usually fail because of the unusually high levels of hydrocarbons (HC) in the exhaust.

What causes a cylinder to misfire? Basically, it's one of three things: loss of spark; the air/fuel mixture is too far out of balance to ignite; or loss of compression. Loss of spark includes anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. Causes include worn, fouled or damaged spark plugs, bad spark plug wires or even a cracked distributor cap. A weak coil or excessive rotor gas inside a distributor would affect all cylinders, not just a single cylinder.

"Lean misfire" can occur when the air/fuel mixture is too lean (not enough gasoline in the mixture) to burn. This can be caused by a dirty, clogged or inoperative fuel injector; air leaks; or low fuel pressure because of a weak pump, restricted filter or leaky pressure regulator. Low fuel pressure would affect all cylinders rather than an individual cylinder, as would most air leaks. A leaky EGR valve can also have the same effect as an air leak.

Loss of compression means the cylinder loses most of its air/fuel mixture before it can be ignited. The most likely causes here are a leaky (burned) exhaust valve or a blown head gasket. If two adjacent cylinders are misfiring, it's likely the head gasket between them has failed. Also, if an engine is overheating or losing coolant, it's likely the head gasket is the culprit.

Intermittent misfires are the worst kind to diagnose because the misfire comes and goes depending on engine load or operating conditions. They seem to occur for no apparent reason. The engine may only misfire and run rough when cold but then smooth out as it warms up. Or, it may start and idle fine but then misfire or hesitate when it comes under load. Also, it may run fine most of the time but suddenly misfire or cut out for no apparent reason. Intermittent misfires can be a real challenge to diagnose, so let's start with a steady misfire in one cylinder before moving on to intermittent misfires.

Hope this help.

Mar 25, 2010 | 1989 GMC Sierra

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