- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
A P0302 is indicating that cylinder # 2 is misfiring...Cylinder # 2 is the second plug counting from the front to rear of engine...Main causes for misfire are: defective spark plug, spark plug wire...When was last time plugs were changed? if it has been awhile I would suggest changing them...Also the spark plug wires should be replaced...Changing one plug and/or one wire isn't a good idea; change them all...Plugs cost two or three dollars apiece and a set of wires around $15...Standard motor products wire set # 4717...Spark plugs; Bosch platinum gaped at .044
Usually when you change the plugs that you also should change the distributor cap and rotor as well. When you changed the plugs with hopefully with the Alero specifications type manufacturer spark plugs that you have to also change the timing belt too is why your idling is low. All spark plugs have a gap in them so your car special plugs should too. You might have the wrong spark plugs with the wrong gap in them so you can ask autozone for the gap specs for your year, make and model plus you can buy the right spark plugs there too. The spark gap will change the timing of car depends on the gap.
CHANGE SPARK PLUGS.YOU NEED SPARK PLUG 3/8 SOCKET.YOU NEED SHORT AND LONG 3/8 EXTENSIONS.YOU NEED SPARK PLUG BOOT PULLER AND A SPARK PLUG GAUGE SET THE SPARK PLUG GAP.NOW CHANGE 1 SPARK PLUG AT A TIME SO YOU MIX THEM UP GET FIRING ORDER MIX UP CAR BACK FIRE WONT CRANK.ALSO CHANGE PLUG WIRES ALSO.
Many people change there plugs on a yearly basis. Motorcycle plugs are like car plugs. A standard car plug is usually good for 10,000 miles. The same is true for most motorcycle plugs. I change my plugs every two years , and carry a spare set just in case I foul a set on a trip (bad gas). My plugs generally are changed between 5000 to 8000 miles.
FIRST OF ALL YOU HAVE CHANGE SPARK PLUGS WHEN ENGINE IS COOL.IF YOU CHANGE THEM WHILE ENGINE IS HOT YOU COULD DAMAGE THE ALUMINUM HEADS OR CAUSE DISTORTION.TO CHANGE SPARK PLUGS YOU NEED A SPARK PLUG SOCKET.A TORQUE WRENCH.ITS NOT MANDATORY.BUT IT WILL KEEP YOU FROM OVER TIGHTEN SPARK PLUGS.YOU NEED A 3/8 RATCHET AND EXTENSION.YOU ALSO NEED A SPARK PLUG GAP GAUGE.AND SPARK PLUG BOOT PULLER.YOU ALSO NEED SOME ANTI SEIZE COMPOUND.TO PREVENT DAMAGE THREADS WHEN INSTALLING THE SPARK PLUGS.
In servicing the spark plug . If the owner will be the one to change the spark plug then. the owner should locate the spark plugs . then prepare the equipments that is going to be used to change spark plug .First disconnect the spark plug cable to the spark pug . Then use the equipment to take the spark plug off to the engine. The spark plug should be twisted counter clock wise using the equipment to remove the spark plug.Then replace the spark plug.In returning the spark plug ,using the equipment you have to twist the spark plug clock wise . Then set the distributor shaft turn it according to the proper firing order that will be set to the spark plug if it is 1,3,4,2. Then the distributor shaft mark will be on 1.If 2,3,4,1 then the distributor shaft mark will be on 2. Then connect the spark plug cable , after connecting the owner have to test start the car so that to if it back fires .If it back fires then the owner have to repeat again the setting of the firing order of the spark plug until it will not back fires.If the owner don't have time to do the job in servicing or changing spark plug then the owner have to go to a car mechanic and let them change the spark plug.
Have you changed all the plugs to platinum and wires? My xterra was doing that and I changed all of them and now it runs great. Also, I changed the distribitor cap and rotor button.
×