Question about 1996 Ford Explorer

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How can I get rid of code P0303 ?

I've changed the fuel filter & checked the plug wire.What should I do next?

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Did you visually check for spark at the spark plugs? Check fuel injector, check cylinder compression. The basics, fuel--spark--compression. Go from there.

Posted on Mar 27, 2015

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P0303 Code Cylinder 3 Misfire

did you reset the code and see if the same code comes back?

read the stuff on that link

enter year make model to google search for car owners with similar problem

Posted on Mar 27, 2015

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  • Ford Master
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Replace the coil,it is misfiring

Posted on Mar 27, 2015

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2 Answers

Car sputtering badly. Codes P303 n P102 show on diagnostics and have replaced both parts associated with these codes,PLUS, new fuel filter, engine still sputtering badly.


Hi,

I hope I can help with this. This could mean the engine spark plugs or plug is the issue. Also check the exhaust pipe. White smoke indicates a coolant issue. Check your coolant reservoir. Black smoke indicates a Fuel issue. Blue is an oil issue. Also, speaking of your spark plugs there very well could be a misfire.

the code P303 could be cylinder 3 misfire
P102 the mass air flow sensor which is on the air filter cover. It's an electrical part and is sensor. Please check these and let me know.

Jul 28, 2016 | Cars & Trucks

1 Answer

Misfire p0303


Check wiring harness around and including plug to the coil pack. Also check fuel pressure with vehicle running. I'm not sure of the specs but, Iit should be around 35 to 40 psi. at idle, and 50 to 75 at higher RPM's. I've seen Fords run with a bad fuel pump and demonstrate these exact symptoms

Mar 06, 2014 | Ford Cars & Trucks

2 Answers

2008 Cadillac CTS returning P0303 after replacing spark plug and coil pack


Error Code: P0303
Description:
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression, cylinder No.3. (check valve clearance and throttle plate for excessive wear)
Engine control module (ECM).

Feb 27, 2014 | 2008 Cadillac Cts

1 Answer

What is codep0303


A P0303 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #3.
A code P0303 may mean that one or more of the following has happened:
Faulty spark plug or wireFaulty coil (pack)Faulty oxygen sensor(s)Faulty fuel injectorBurned exhaust valveFaulty catalytic converter(s)Running out of fuelPoor compressionDefective computer
Possible Solutions:If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Hope helps.

Mar 02, 2012 | Ford Explorer Cars & Trucks

2 Answers

I have several codes on my 1998 windstar they are P0303, p0171, P0402 and P0174. Is there one or two items I can change that may resolve some or all these codes?


The 303 is a misfire, and if there's no issue with the plugs or wires, I've replace a TON of ignition coils. If you remove the coil pack and see ANY type of crack in the mold on the bottom, replace it, it's done! The 171 and 174 are typically the intake plenum seals. The plenum gasket doesn't need to be replace, but the lower seals and bolt/seal kit (the bolts that hold it on to the intake manifold) require changing.

May 17, 2011 | 1998 Ford Windstar

1 Answer

1997 Jarguar. Code P0303. Missfire


Code info from:
http://www.obd-codes.com/p0303

Cylinder #3 Misfire Detected
What does that mean?

A P0303 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #3.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Symptoms Symptoms may include:

  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Causes

A code P0303 may mean that one or more of the following has happened:

  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
Possible Solutions

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic convertermag-glass_10x10.gif has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Apr 25, 2011 | Jaguar Vanden Plas Cars & Trucks

2 Answers

Code 303 and 304 and check engine light plugs have not been changed 119.000 miles is it tune up time


P0303....Cylinder 3 Misfire Detected

P0304....Cylinder 4 Misfire Detected

sounds like a new set of HT leads and plugs wouldnt go amiss(fire wires) weird name that fire wires HT stands for high tension leads in proper english .

Mar 07, 2011 | Ford F-150 Cars & Trucks

2 Answers

2000 Kia Sephia p0303 code engine misfires


do a compression test. cylinder 3 could have a bad valve lifter or valve.kia sephia dont have push rods.it have a bucket type followers.a intake leak to that cylinder can also cause misfire problems.

Jun 06, 2009 | 1999 Kia Sephia

1 Answer

What is the meaning of 98 Honda Civic error codes P0300 P0303 P0304? Engine will not start, does not seem to fire.


P0300 indicates that there is multiple miss fire in the ignition system. P0303 and p0304 indicates the miss fire is in cylinder #3 and #4. Replace the spark plug, and wire set, and rotor and cap if there is one. Can not remember if there are coil packs on the civic, the age thing. change the fuel filter and clean out the fuel injectors with fuel injector cleaner for the next 3 full ups. When the spark plugs are removed, inspect them for condition, if there clean or dirty with carbon build up. which would indicate how the engine is running. Keep me posted and drive safe.

Jun 04, 2009 | 1999 Honda Civic

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