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Code po303 cylinder 3 misfire on a 2004 pacifica

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

j_del
  • 1586 Answers

SOURCE: 1999 vw jetta 2.0

Sounds like two problems. P0300 and P0303 are possibly spark plugs. They could be a coil pack but I'm leaning toward a spark plug problem because of the other two codes - they're indicating O2 sensor problems. If the O2 sensors are screwed up, the car reverts to preprogrammed, rich fuel maps that send excessive fuel through the engine. The reasoning is, if the ECU can't trust the O2 sensors to determine how much fuel to burn optimally, it'll pump a bunch of extra fuel through the engine to keep it safe. Having too little fuel (aka running lean) can destroy an engine, so the ECU plays it safe and runs rich (too much fuel) instead. The consequences of rich running are relatively minor compared to lean running, but can and do tend to create excessive carbon buildup on the catalytic converter and O2 sensors, as well as fouling spark plugs.

First thing to do though is to swap the wires on your coil packs and see if you end up with a misfire code for the same cylinder #3. If you do, then it's the plug or wire. If it moves, it's the coilpack. Replace whichever part is faulty. You'll probably need oxygen sensors too, before you can clear all the codes.

Posted on Sep 02, 2008

  • 1114 Answers

SOURCE: misfire code on #3 cyl. 2004 Suzuki Verona

I had the same problem I disconnected the battery to reset computer when I was changing my plugs & ignition wires! hope this helps

Posted on Dec 23, 2008

roedmondson
  • 68 Answers

SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced

  1. P0171: This means that the oxygen sensor has detected a lean air-fuel ratio. This can be caused due to a vaccuum leak or a problem in the HO2S circuit or the HO2S (Heated Oxygen Sensor) itself. (Bank one Sensor one). This is commonly located along the exhaust pipe. It could also be a bad Mass Air Flow sensor or a bad Engine Coolant Temperature sensor. Diagnostic checks will be needed to be carried out to be verified though
  2. Well as for the other codes, it means #3&4 cylinders are misfiring. It is a possibility that the P0171 code mite have caused the others to show up. I can be wrong though. But it is a strong possibility. If the air fuel mixtue is too lean indeed, mis-firing will occur, unless it is an actual electronic and not a mechnical problem. By the way, when these codes appear, how is the engine's performance. Does it remain the same or behaves poorly?

Posted on Feb 14, 2009

  • 14036 Answers

SOURCE: I have a 2004 F150 with 5.4, rough at idle and

bad fuel injectors or leaking intake.

Posted on May 05, 2009

tragedy lok
  • 266 Answers

SOURCE: misfire of the #3 cylinder, 4.3 6 cyl

R THEY WIRED CORRECTLY,WITH THE SAME GAP??

Posted on Aug 18, 2009

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1 Answer

Po303


code po303 refers to cylinder 3--misfire detected===causes --engine mechanical fault---wiring---ignition/ fuel system---injector---ECT/MAF sensor---ECM. check plug and HT lead to no 3 cylinder. Check that the injector to 3 cylinder is operational and not blocking or squirting. Have a compression test done to check for compression / gasket problems

Dec 14, 2013 | 2006 Chevrolet HHR

1 Answer

I'm trying to find out what po303 and po300 means


P0300: Random/Multiple Cylinder Misfire Detected
P0303: Cylinder 3 Misfire Detected
It looks like cylinder 3 isn't firing properly.

Apr 22, 2013 | Cars & Trucks

1 Answer

Po303 misfire


this code identifies that the computer in your vehicle has picked up that cylinder 3 is not fireing properly so i would say change the plug in cylinder 3 if not cured change the plug lead if thes dosent work then distributer cap or the electronic distributer check all these things in this order its just elimination really

Sep 02, 2012 | Ford Taurus Cars & Trucks

1 Answer

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

3 Answers

CODES-PO301-PO303-PO316- CHANGED PLUGS & WIRES. STILL MISS ON START UP, GOES AWAY MOST OF THE TIME ABOVE 1000 R.P.M


P0301 - Cylinder 1 Misfire Detected.

Causes:
- 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

Solutions:
- 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.

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

Solutions:
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

1 Answer

What does the code po303 mean


PO303 = Misfire detected on cylinder # 3 -- Possible need for tune up or related service Plug wires, spark plugs?. Good Luck, Ned

Aug 11, 2010 | 2004 Dodge Stratus

1 Answer

PO303 PO353 codes on a 02 lincoln ls missfire?


P0353 - Ignition Coil 3 Control Circuit P0303 is a cylinder #3 misfire.Good chance the the cylinder 3 coil has failed.

Jun 06, 2010 | 2002 Lincoln LS

2 Answers

2002 ford windstar showing obd2 codes po303,po304,po305 and idiling ruff and wont run over 45 mph and has low miles, how do i fix it ,thanks sincerely mark


might be the coil pack is bad, wires, plugs, o2 sensors, dirty injectors, catalic converter ( only if you smell rotten eggs ) . cylinders are misfireing.

Mar 23, 2009 | 2002 Ford Windstar Cargo

3 Answers

3 codes po303,uo101,uo107


break down of the codes is

po303 - that would be a misfire on cylinder 3
uo101 - cant communicate with TCM
uo107 - lost communication with throttle actuator control module

Feb 26, 2009 | 2005 Chevrolet Equinox

4 Answers

HI I HAVE A 2001 MAZDA TRIBUTE AND THE CODES PO301 AND PO303 CAME UP IN THE DIAGNOSTIC REPORT. THE CAR TURNS OFF WHEN I WARM IT UP IN THE MORNING IN THE COLD AND AFTER THAT ITS FINE I ALREADY CHANGED THE...


cylinder 1 misfire and low compression. Plugs and wires changed plus new fuel injectors. The engines still misses and no one can find the cause. When put on the computer it read misfire cylinder 1.

Dec 31, 2008 | 2004 Mazda Tribute

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