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#2 cyl. not hitting code #po302 replaced spark plug & wire

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See if the plug is oil fouled on#2

Posted on Sep 29, 2010

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How to change coils on 2003 expedition


please tell me in this tune up you had new spark plugs put in? if check engine light is on there are some stored codes those will give you the suspect cylinder(s) check to see if you have plug wires if not there will be a coil for each cyl. pass. side of motor starting in the front working to the back or firewall cyls are 1,2,3,4 driver side same front to back 5,6,7,8 codes will be PO301 cyl 1. PO302 cyl 2. etc. get the code find the correct cyl. unplug little connector u will need a 7mm socket to remove the bolt holding the coil in place then pull up on the coil and boot.... if u have plug wires get the code find correct cyl and follow plug wire to coil pack in front of engine there will be two one on each side in front of engine...

Apr 17, 2013 | 2003 Ford Expedition

1 Answer

Po302 po303 po316 code


The Codes 302 & 303 are cylinder misfire codes,google them

Spark Plugs have nothing to do with misfires,it would be rare in
a life time if one ever failed to fire

Forget the 316 just misfires on start up

A repair shop would be your best choice without knowledge,
reference material & test equip

Ignition coil or vacuum leak problem

Feb 05, 2013 | 2002 Mercury Sable

1 Answer

2004 GMC Envoy misfire


If you pull the #2 plug out and start the engine do you see a spark? You didn't mention if you checked the wires or not, but it could be a bad plug wire. If there is a spark, I'd try and see if the #2 injector is actually firing like you mentioned above.

Jan 24, 2013 | 2004 GMC Envoy

1 Answer

2003 freeland code p1319 , misfire code po301,po302,po303,po304, misfire at idel, high speed drive fine,


OBDII those codes generally mean misfire.

P0300 multiple missfire
P0301 missfire cyl 1
P0302 missifre cyl 2
ect.

Ensure you have the proper spark plugs. Check the coil boots/wires, look for burn marks. Anything beyond that you may have to take it back to the shop.
You are misfiring on all 4 cylinders and it is not spark plugs. Those misfires if not addressed can cause serious engine and/or cat converter damage. There are lots of things that could be causing it and most of them need to be checked out at a shop - unless you want to invest several thousand dollars in the appropriate equipment and training.

Dec 21, 2010 | 2003 Land Rover Freelander

2 Answers

I have a 2000 gmc jimmy with a service engine soon light. i received the code p0302 misfire detected cylinder 2.I replaced spark plugs and distributor cap and rotor. but still on. any other suggestion?


Well, Spark Plugs wear over time,seldom fail to fire
A worn or dirty rotor and cap will still fire, also

You never throw new wires at it,I don't,mine last 18 years,
on all vehicles

You need some OBD2 knowledge,start studying

The PO302,last # is the cylinder
Number 2 is misfiring

If you got individual coils, go there
If you got an ignition module, for all the cyl,go there
If you got plug wires,there is an extremely odd chance, one burned out inside ,on #2
& you did say your have a dist cap.

So you do have a cylinder monitor,that detected it
That may be the crank sensor,another possible

Need to know the system and how to test it.

You need to give veh specifics ,not just a year

Dec 01, 2010 | 2000 GMC Jimmy

1 Answer

How do i fix the code i got PO302.


change spark plugs. cyl #2 missfire

Jul 20, 2010 | 2001 Kia Sephia

1 Answer

ODB reader states PO302 , #2 cylinder misfire. Changed plugs and wires, no change.


po302 is also injector fault on cyl 2

Swop injectors check codes to see if problem has changed

May 31, 2010 | 2001 Ford Taurus

1 Answer

2006 dodge caravan, 6 cyl. relaced cole, sparkepugs and wires in oct. 2009. Engine is reading #2 cyl. misfire again. Why


Firts time swap spark plug & ignition coil between two different cylinders and read again if the same #2 cyl. misfires !
If #2 cyl. is OK and another cyl. misfires then spark plug or ignition coil is out of order and must be replaced.
If #2 cyl. misfires again then #2 injector must be checked !
If ignition coils & spark plugs (complete set for 6 cyl.) are replaced then you must check #2 injector !

Mar 15, 2010 | 2006 Dodge Caravan

1 Answer

Engine runs rough in gear.


Okay disconnect battery for 3 min to reset engine light to turn off! change wire #2 to #3, Swap them then start it. if misfire happens again if your fault codes goes from po302 to po303 then your ignition wires should be changed!!! if it is the same the that side of coil might be at your point of interest to change but I think spark wires might do it!!!! spark plugs should be the same time!!!! I think this will help??

Sep 28, 2008 | 2000 Saturn Ls 4dr Sedan

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