Friends d16y8 has real bad spark knock, need help!!
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Friends d16y8 has real bad spark knock, need help!!
my friends 100% stock 98 civic ex started having some real bad spark knock. im 100% positive it is spark knock. its coming from the #1 cylinder. ive tested, checked, replaced everything, and the damn thing is just getting worse.. its soo loud. i have searched on here and find a bunch of posts from people that dont know what causes it.
i know its caused by early detonation, but what the hell is causing that?? please help, my friend is ready to just buy a new engine....
i know its caused by early detonation, but what the hell is causing that?? please help, my friend is ready to just buy a new engine....
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Re: (civic_driver)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic_driver »</TD></TR><TR><TD CLASS="quote">what exactly have you checked and replaced?</TD></TR></TABLE>
checked cam timing, ignition timing, adjusted valves, replaced plugs, cap, wires, rotor, put some heet in it, compression check, leak down check, put some 93 octane in it. i basically looked over and checked EVERYTHING on the engine. even searched on here and found NOTHING. very wierd. spark knock = rare.
checked cam timing, ignition timing, adjusted valves, replaced plugs, cap, wires, rotor, put some heet in it, compression check, leak down check, put some 93 octane in it. i basically looked over and checked EVERYTHING on the engine. even searched on here and found NOTHING. very wierd. spark knock = rare.
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Re: (civic_driver)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic_driver »</TD></TR><TR><TD CLASS="quote">checked distributor icm and coil?
is there any difference in sound coming from the #1 injector?
How's the gap on the #1 spark plug compared to the rest?</TD></TR></TABLE>
the car runs and drives great, just alot of noise. so how could it be the icm or coil. i mean arent they either good or bad? all the injectors sound the same and work. and i gapped all the new plugs the same. if it is an injector, wouldnt it throw a CEL?
is there any difference in sound coming from the #1 injector?
How's the gap on the #1 spark plug compared to the rest?</TD></TR></TABLE>
the car runs and drives great, just alot of noise. so how could it be the icm or coil. i mean arent they either good or bad? all the injectors sound the same and work. and i gapped all the new plugs the same. if it is an injector, wouldnt it throw a CEL?
Honda-Tech Member
Joined: Aug 2005
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From: USA
scratch the coil and icm...
does the knock sensor work? how's the dizzy timing? are you sure it's happening only on one cylinder and not the rest?
what type of gas you got there? station brand? could be shitty gas
as far as CELs go, it should but you never know
does the knock sensor work? how's the dizzy timing? are you sure it's happening only on one cylinder and not the rest?
what type of gas you got there? station brand? could be shitty gas
as far as CELs go, it should but you never know
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Re: (civic_driver)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic_driver »</TD></TR><TR><TD CLASS="quote">scratch the coil and icm...
does the knock sensor work? how's the dizzy timing? are you sure it's happening only on one cylinder and not the rest?
what type of gas you got there? station brand? could be shitty gas
as far as CELs go, it should but you never know</TD></TR></TABLE>
knock sensor works, check ignition timing, only happening on #1 cylinder. stops whenever i pull the #1 plug wire. its not bad gas. been doing it for many different fill ups.
does the knock sensor work? how's the dizzy timing? are you sure it's happening only on one cylinder and not the rest?
what type of gas you got there? station brand? could be shitty gas
as far as CELs go, it should but you never know</TD></TR></TABLE>
knock sensor works, check ignition timing, only happening on #1 cylinder. stops whenever i pull the #1 plug wire. its not bad gas. been doing it for many different fill ups.
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Joined: Aug 2005
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From: USA
maybe spark plug wire/spark plug is bad? even new items could be defective...
try this.. swap the #1 spark wire with another one (it could be tough but try it or if you have an extra set of wires, use one of the wires from that to reach the #1)
if the knock changes to the swapped cylinder than it's a spark plug wire.... try the same with your spark plugs
try this.. swap the #1 spark wire with another one (it could be tough but try it or if you have an extra set of wires, use one of the wires from that to reach the #1)
if the knock changes to the swapped cylinder than it's a spark plug wire.... try the same with your spark plugs
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Re: (civic_driver)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic_driver »</TD></TR><TR><TD CLASS="quote">maybe spark plug wire/spark plug is bad? even new items could be defective...
try this.. swap the #1 spark wire with another one (it could be tough but try it or if you have an extra set of wires, use one of the wires from that to reach the #1)
if the knock changes to the swapped cylinder than it's a spark plug wire.... try the same with your spark plugs</TD></TR></TABLE>
yea, ive already tried that... i really dont know what is causing it. and its only getting worse. thats why my friend is about to just get a new engine.
try this.. swap the #1 spark wire with another one (it could be tough but try it or if you have an extra set of wires, use one of the wires from that to reach the #1)
if the knock changes to the swapped cylinder than it's a spark plug wire.... try the same with your spark plugs</TD></TR></TABLE>
yea, ive already tried that... i really dont know what is causing it. and its only getting worse. thats why my friend is about to just get a new engine.
Honda-Tech Member
Joined: Aug 2005
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From: USA
so after swapping parts (one by one) it still remained in #1 cylinder? hmm
how is the compression in cyl #1 compared to others? Is it higher? I think it's a motor problem and you will have to open the motor up to find out what's up
but i would first try premium gas... you never know... so the ECU doesn't have any codes?
how is the compression in cyl #1 compared to others? Is it higher? I think it's a motor problem and you will have to open the motor up to find out what's up
but i would first try premium gas... you never know... so the ECU doesn't have any codes?
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Re: (civic_driver)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic_driver »</TD></TR><TR><TD CLASS="quote">so after swapping parts (one by one) it still remained in #1 cylinder? hmm
how is the compression in cyl #1 compared to others? Is it higher? I think it's a motor problem and you will have to open the motor up to find out what's up
but i would first try premium gas... you never know... so the ECU doesn't have any codes?</TD></TR></TABLE>
no cel's, tried 93 octane. but doesnt matter, engine is made to run on 87. compression the same all across the board.
how is the compression in cyl #1 compared to others? Is it higher? I think it's a motor problem and you will have to open the motor up to find out what's up
but i would first try premium gas... you never know... so the ECU doesn't have any codes?</TD></TR></TABLE>
no cel's, tried 93 octane. but doesnt matter, engine is made to run on 87. compression the same all across the board.
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Re: (civic_driver)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic_driver »</TD></TR><TR><TD CLASS="quote">other things to check: egr valve, carbon build up (doubt it for that new of a car), injector
most likely an internal motor problem</TD></TR></TABLE>
what internally could cause spark knock.
man i have searched and searched the entire internet and no one knows how to fix spark knocking.
my friend is buying a new engine, it would be so much better if we could fix this.
most likely an internal motor problem</TD></TR></TABLE>
what internally could cause spark knock.
man i have searched and searched the entire internet and no one knows how to fix spark knocking.
my friend is buying a new engine, it would be so much better if we could fix this.
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Re: (kkim)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kkim »</TD></TR><TR><TD CLASS="quote">Have you done a compression test? also, is the #1 spark plug color any different from the rest?
excatly what do you mean by "spark knock"?</TD></TR></TABLE>
compression is fine and all the psark plugs are brand new.
Spark knock can be caused by a variety of things including using low octane fuel, over-advanced ignition timing, too much compression (often due to a buildup of carbon in the combustion chamber), by an inoperative EGR valve, and/or by too much heat. If switching to a higher octane fuel doesn't cure the problem, the cause should be investigated because prolonged or heavy knocking can damage the engine.
Spark knock is when the spark of the spark plug ignites the fuel/air charge in the combustion chamber sooner then is should. If the ignition is to far advanced it can lead to spark knock and you can hear the engine rattling like marbles in a coffee can. There are things that can contribute to this like a lean mixture, a faulty EGR system and probably a bunch of other things. Again the important thing to remember here is the mixture is lit by the spark of the spark plug, but just to soon.
basically it sounds like valves tapping but amplify that sound by 1000x. cuz this this **** is loud as fawk!
excatly what do you mean by "spark knock"?</TD></TR></TABLE>
compression is fine and all the psark plugs are brand new.
Spark knock can be caused by a variety of things including using low octane fuel, over-advanced ignition timing, too much compression (often due to a buildup of carbon in the combustion chamber), by an inoperative EGR valve, and/or by too much heat. If switching to a higher octane fuel doesn't cure the problem, the cause should be investigated because prolonged or heavy knocking can damage the engine.
Spark knock is when the spark of the spark plug ignites the fuel/air charge in the combustion chamber sooner then is should. If the ignition is to far advanced it can lead to spark knock and you can hear the engine rattling like marbles in a coffee can. There are things that can contribute to this like a lean mixture, a faulty EGR system and probably a bunch of other things. Again the important thing to remember here is the mixture is lit by the spark of the spark plug, but just to soon.
basically it sounds like valves tapping but amplify that sound by 1000x. cuz this this **** is loud as fawk!
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Re: (Evs-One)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evs-One »</TD></TR><TR><TD CLASS="quote">You sure it's an ignition problem and not a rod knock??I've never seen a car detonate at idle....but who knows. What happenes when you pull the #1 wire?</TD></TR></TABLE>
no im 100% sure its spark knock. when i pull the plug wire the sound goes away.
no im 100% sure its spark knock. when i pull the plug wire the sound goes away.
Solbros Owns Me
Joined: Jun 2002
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From: Vancouver, WA, USA
Re: (mike93eh)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh »</TD></TR><TR><TD CLASS="quote">
no im 100% sure its spark knock. when i pull the plug wire the sound goes away.</TD></TR></TABLE>
again, pulling a wire on a car with a od knock, will tell which cylinder- it takes the load off the bearing and it just rotates around the journal...pretty much garaunteed rod knock...sorry...drop the pan and look for shavings
no im 100% sure its spark knock. when i pull the plug wire the sound goes away.</TD></TR></TABLE>
again, pulling a wire on a car with a od knock, will tell which cylinder- it takes the load off the bearing and it just rotates around the journal...pretty much garaunteed rod knock...sorry...drop the pan and look for shavings
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Re: (Evs-One)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evs-One »</TD></TR><TR><TD CLASS="quote">again, pulling a wire on a car with a od knock, will tell which cylinder- it takes the load off the bearing and it just rotates around the journal...pretty much garaunteed rod knock...sorry...drop the pan and look for shavings</TD></TR></TABLE>
if it is rod knock, then what will need to be replaced?
if it is rod knock, then what will need to be replaced?
Solbros Owns Me
Joined: Jun 2002
Posts: 14,462
Likes: 6
From: Vancouver, WA, USA
Re: (mike93eh)
you MIGHT be able to get by with just replacing the bearing on that journal- which is fairly easy, just drop the oil pan.
But if the crank journal is bad, you'll need to replace the crank also- so, might as well do the short block if it's that bad
But if the crank journal is bad, you'll need to replace the crank also- so, might as well do the short block if it's that bad
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