spark plug question
#1
spark plug question
i recently changed the spark plugs in my 3rz 4runner, and i've noticed that under modest accerlation (ie not enough to cause a downshift), a slight clicking comes from the engine, which hadn't happened before. based on what i've read, it seems that this is likely to be engine pinging, but i'm wondering what you guys think?
some extra info - the spark plugs put in were oem NGK plugs, but i gapped them myself to the factory spec (.032 i think).
thanks for reading this
some extra info - the spark plugs put in were oem NGK plugs, but i gapped them myself to the factory spec (.032 i think).
thanks for reading this
#5
Registered User
Join Date: Oct 2005
Location: Charlotte, NC
Posts: 187
Likes: 0
Received 0 Likes
on
0 Posts
i dont know if its the same thing but after i got mine changed i noticed a slight change in the engine "hum" at idle (also had water pump and timing belt done with this) dont know if the noise is also spark plug related
Trending Topics
#8
Contributing Member
Find the arc and solve the break in the system. Try doing it in the dark so you can see the spark. Don't over tighten your plugs, you're just looking for one that's gotten itself loose and don't forget the antiseize.
#9
Registered User
Join Date: Mar 2006
Location: TN. in the summer,AL. in the winter
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
I believe the manual is Wrong on plug gap. As mine was.
Called the company that you are using their plug. Like NGK, Denso and etc.
I went through the same thing with my plugs, manual said .031 Wrong. It is .043. As per NGK.
Called the company that you are using their plug. Like NGK, Denso and etc.
I went through the same thing with my plugs, manual said .031 Wrong. It is .043. As per NGK.
Originally Posted by fatmouse
i recently changed the spark plugs in my 3rz 4runner, and i've noticed that under modest accerlation (ie not enough to cause a downshift), a slight clicking comes from the engine, which hadn't happened before. based on what i've read, it seems that this is likely to be engine pinging, but i'm wondering what you guys think?
some extra info - the spark plugs put in were oem NGK plugs, but i gapped them myself to the factory spec (.032 i think).
thanks for reading this
some extra info - the spark plugs put in were oem NGK plugs, but i gapped them myself to the factory spec (.032 i think).
thanks for reading this
#11
thanks for the replies. just an update - i tried installing the factory densos, which are pre-gapped, and the ticking is still there. i'm thinking its actually pinging since it only occurs after the engine warms up.
the other thing i put in was a k&n air filter - could this have anything to do with the issue, by maybe throwing the fuel/air mixture off?
the other thing i put in was a k&n air filter - could this have anything to do with the issue, by maybe throwing the fuel/air mixture off?
#12
is it possible the oil off the k&n filter fouled up the MAF?
edit: just to clarify, this problem only occurs under load and not in neutral.
edit: just to clarify, this problem only occurs under load and not in neutral.
Last edited by fatmouse; 04-01-2006 at 03:27 PM.
#13
Contributing Member
Join Date: Dec 2005
Location: Vancouver BC
Posts: 402
Likes: 0
Received 0 Likes
on
0 Posts
Go out in the dark, vehicle running and nice and hot.... get a spray bottle that is adjustable to a FINE MIST.... mist around the spark plug wires and see if you get any arcing, most likley around where the plugs are.... because it is dark you should really be able to see it if thats the case....
How many miles on the truck? and are the wires original?
How many miles on the truck? and are the wires original?
#14
Originally Posted by Mr. Bob
Go out in the dark, vehicle running and nice and hot.... get a spray bottle that is adjustable to a FINE MIST.... mist around the spark plug wires and see if you get any arcing, most likley around where the plugs are.... because it is dark you should really be able to see it if thats the case....
How many miles on the truck? and are the wires original?
How many miles on the truck? and are the wires original?
#18
ok thanks for your help bob, i checked for arcing and i didnt seem to see any, but i did try throwing in a new oem air filter (those paper toyota ones) and the problem went away. i have no idea why an air filter would cause a tapping/ticking noise, but now its gone. i'm still kind of baffled.
#19
Registered User
Join Date: Apr 2006
Location: Seattle, WA
Posts: 63
Likes: 0
Received 0 Likes
on
0 Posts
General spark plugs will not cause this problem and factory dealer plugs come pre gapped.
Sound like your engine had pre-detenation(or pinging), this is caused by higher than normal tempetures in the combustion chambers. What it is doing is, igniting the air/fuel mixture b4 top dead center when can cause serious damage.
The KN air fiter allowed extra air into your engine leaning the mixture out. A lean mixture results in higher engine temps causing your ticking sound.
Did you try resetting the ECU after installing the KN? Disconnect the ECU fuse in the eng. bay for 10mins and then drive it ,so it will "relearn" the additional air.
Sound like your engine had pre-detenation(or pinging), this is caused by higher than normal tempetures in the combustion chambers. What it is doing is, igniting the air/fuel mixture b4 top dead center when can cause serious damage.
The KN air fiter allowed extra air into your engine leaning the mixture out. A lean mixture results in higher engine temps causing your ticking sound.
Did you try resetting the ECU after installing the KN? Disconnect the ECU fuse in the eng. bay for 10mins and then drive it ,so it will "relearn" the additional air.
Thread
Thread Starter
Forum
Replies
Last Post
88runnergomas
86-95 Trucks & 4Runners
0
07-09-2015 01:12 PM