Question about 2003 Ford Taurus

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Hesataion i have replaced fuel filter spark plugs wires coil ingnation cam shaft sensor on the codes it keeps reading cylinder 3 missfire

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You could have mechanical issues with cylinder #3 or a fuel injector not firing on #3 or a intake gasket leaking @#3 mechanical issues could be low compresion ,broken valve spring ,burnt valve and so on i would lean to the injector have seen this numerous times

Posted on Aug 01, 2010

  • thecranks Aug 03, 2010

    also as a diagnostic tool i sometimes since three is my suspect cyl. i remove the fuel rail and switch the #3 and #4 injector on the fuel rail recheck engine if your problem is on #4 now instead of #3 you know that injector was on 3 so it,s your problem

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I have a 2011 cruze 1.6,i have a missfire,have changed the plugs to no avail still missfireing,any help would be appresiated thanks


bad injector--bad coil --if misfire is not a constant cylinder than fuel pressure cam sensor/crank sensor and such

Jun 20, 2016 | Cars & Trucks

4 Answers

I have a 1996 chevy Corsica with a code PO300.I have tried many repairs and still cannot repair this code


code p0300 refers to random/multiple cylinder/s ---misfire detected=== causes spark plug/s--HT lead/s--injector/s---ignition coil/s--low compression --wiring
Seeing as you have covered all the electrics, now concentrate on the injectors and fuel pressures
If you will do all injectors and the fuel pressure is where it is supposed to be ( pressure test) then you will have covered all bases
Low compression will be in the one cylinder only ans will remain in that cylinder regardless of injector or plug changes
I would leave that to the last resort as if it is random, it may be a loose valve seat insert that moves randomly causing a compression problem

May 24, 2015 | 1996 Chevrolet Corsica

2 Answers

Cylinders 1 and 3 misfiring on 2.4 Liter 97 chevy malibu


code p 0300 is random/ multiple cylinders ----misfires detected ===causes ---spark plugs ---HT lead/s---injector/s---ignition coil/s---low compression---wiring
he has changed a lot for nothing
a 5 year old engine can have a lot wrong with it --so new out of a crate is no guarantee
most misfires are from injector problems
it could be a loose valve seat insert so have a compression test done if moving the injectors to new locations doesn't move the misfire

Apr 19, 2017 | Cars & Trucks

1 Answer

Getting a PO300 code, have replaced the crank, MAP sensors, fuel pump and filter and replaced Coil #3 /new Plugs, i am running out of options. Been like this for two weeks and I need a vechile for work.


P0300 Random/Multiple Cylinder Misfire Detected, if your doing the cylinder number 3 the code should have read PO303,, either way, these are some of what needs to be checked A code P0300 may mean that one or more of the following has happened:
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer
  • 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.
    Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Jun 17, 2011 | Chevrolet TrailBlazer EXT Cars & Trucks

2 Answers

98 passat # 2 missfire help


If your getting a P0302 ( cylinder #2 misfire detected), the first thing to check is the spark plug. If it's new then the next thing to check is the plug wire. If it has individual coils, then swap it out with another one and see if the misfire moves too. If so then the coil is faulty.

May 07, 2011 | 1998 Volkswagen Passat

2 Answers

How to replace spark plugs on 2000 jeep cherokee classic 6 cyl.? Also does 2000 cherokee have inline fuel filter?


TO REPLACE SPARK PLUGS YOU REMOVE COIL PACK MOUNTING BOLTS THEN REMOVE THE COIL PACK WITH BOOT OVER THE SPARK PLUG.YOU HAVE 6 INDIVIDUAL COIL PACK TO EACH CYLINDER. YOU NEED A 3/8 RATCHET WRENCH - LONG 3/8 EXTENSION -SPARK PLUG SOCKET - SPARK PLUG GAUGE.AND TORQUE WRENCH.THE 2000 MODEL JEEPS FUEL FILTER INSIDE THE TANK.1993 - 1996 MODEL JEEPS FUEL FILTER LOCATED LEFT SIDE OF THE VECHICLE NEAR THE FUEL TANK.

Jul 20, 2010 | 2000 Jeep Grand Cherokee

3 Answers

P0308 cylinder 8 misfire detected? How to repair?


Fuel injector cleaner commonly has a low success rate, and will not help if it's more than one cylinder that is missfiring. The fact that you have a "rattle" noise, leads me to beleive the engine is not receiving fuel on one or more cylidners. If it is all the cylinders, than the fuel pump may be the culprit, or the fuel pump circuit. But if only one cylidner is missfiring than it is a possibly an injector. A code P0300 refers to all cylinder missfires, and any code between P0301-P0308 distinugiushes a particular cylinder.

Misfiring
1- a general electrical tune-up (spark plugs, wire set, cap & rotor) is a basic start to cure this issue. Wiggle the dist shaft while you are in there, if you have one.
2- Then a good carbon cleaning / throttle-body cleaning.
3- Vacuum leaks at any of the hoses that connect to the Intake manifold; especially the MAP sensor connection.
4- If that does not help then the O2 sensor could be bad or drifting.
5- Funky coil/coil-packs
6- Theoretically a microsecond glitch in either the cam or crank shaft sensors would cause this, but I am not aware of this as a typical cause.
7- Lastly a funky PCM but again it is not common for this to cause miss-firing.

Note for the V8 then also:
a) bad erg valve (this dilutes the combustion gases and hence raises the combustion temp
b) a leaky plenum/Intake manifold gasket. Leaking Intake gasket symptoms

Also can check the TSB 18-48-98 Ignition System Cross Fire/Secondary Ignition Wire Induction (Complete Version )

Hope help with this (remember rated this). Good luck and have a nice day.

Mar 05, 2010 | 1997 Jeep Grand Cherokee

1 Answer

1999 cadillac escalade missfiring cylinder #6


do you have a seperate coil for each spark plug check ur coil for number 6 or fuel injector

Feb 05, 2010 | 1999 Cadillac Escalade

2 Answers

I HAVE A 1998 FORD EXPLORER AND IT HESITATES ON ACCELERATION AND SOMETIMES IDLES ROUGH. I REPLACED THE SPARK PLUGS, WIRES, AND THE COIL PACK AND STILL HAVE THIS PROBLEMS. THE CODES SHOW MISSFIRES IN BANK 3...


Try running some fuel injector cleaner through your fuel tank. What you may have are a couple of plugged or missfiring fuel injectors. I would suggest checking all of your wiring to your injectors to insure good connection, replace your fuel filter and check for vacuum leaks.

Jul 20, 2009 | 1998 Ford Explorer

5 Answers

Hi, I have a 1997 Porsche 993. Motronic 5.2 M07. I am getting these fault codes 1) 62 misfire emissions-relvant 2) 51 Cylinder 2 misfire emissions-relevant) 3) 54 Cylinder 5 misfire ...


misfire :-------- try checking your 02 sensors /fuel pump and filter.

for 51 cylinder misfire :---
Change the coil. Period. Very easy to remove from the vehicle if it's a 4 cyl. Follow that spark plug wire from the spark plug to the other end. What it's attached to you should replace
for 54 cylinder 5 misfire :---First you have to eliminate the most obvious problems, like spark plug and spark plug wire. If you replace those and you still have a misfire, then it's a good idea to look for a vacuum leak in the intake manifold

Mar 07, 2009 | Porsche 911 Cars & Trucks

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