Cylinder 4 Spark Plug Keeps Blowing
- Thread starter xDJ DUBx
- Start date
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- MSP 1145
greg. i posted in your other thread.
i'm fairly certain this is your issue-over revving.
i remember when you made that video of the turbo in the day time. the driver seriously over revved. .. i know these are non interference motors, but that doesn't necessarily have to do with the plugs. i'm fairly sure the piston slapped the plug. that's your issue.
i'm fairly certain this is your issue-over revving.
i remember when you made that video of the turbo in the day time. the driver seriously over revved. .. i know these are non interference motors, but that doesn't necessarily have to do with the plugs. i'm fairly sure the piston slapped the plug. that's your issue.
If this is in fact a piston tap, wouldn't it happen a lot more frequent or sooner? I mean, its not like I drive the car smooth then when I go hard it happens, it'll take a lot of spirited driving and nothing happens.
Also, when it happened today, normal smooth driving, wasn't going hard at all.
Also, when it happened today, normal smooth driving, wasn't going hard at all.
Laser Blue
Member
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- '03.5 Mazdaspeed Protege / Laser Blue Mica
Think about driving a nail with a little hammer... it isn't one blow that buries the nail.... its a progression. The last tap could be a very light one and still be the one that completely sinks the nail.
EDIT: Does this sound like a rerun of Kung Fu or what...lol
EDIT: Does this sound like a rerun of Kung Fu or what...lol
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- MSP 1145
nice wording(dance)
Laser Blue
Member
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- '03.5 Mazdaspeed Protege / Laser Blue Mica
Ah so.... thank you Grasshoppah
It's under your seat.
How long do you let the motor warm up after it's been sitting cold. Is this happening at the start of your drives when the motor is cold? I ask because if this is piston slap, that is when it will happen. I had piston slap in my first car, 95 Neon, but it would only happen for the first minute or so on a cold motor. As soon as I pulled away, it was fine. I would start with the easy stuff and change the injectors because you never know. After that, you may have to take a good look at that piston to verify that it's contacting the plug.
How long do you let the motor warm up after it's been sitting cold. Is this happening at the start of your drives when the motor is cold? I ask because if this is piston slap, that is when it will happen. I had piston slap in my first car, 95 Neon, but it would only happen for the first minute or so on a cold motor. As soon as I pulled away, it was fine. I would start with the easy stuff and change the injectors because you never know. After that, you may have to take a good look at that piston to verify that it's contacting the plug.
Something else I just thought of, everytime the spark plug goes out, it's never harsh or violent like something hitting something else, it's always driving then it starts missing, but never a distinctive "break" point you know?
Falango, on all occasions, car was fully warm and had been driving for awhile prior to the plug going out.
Falango, on all occasions, car was fully warm and had been driving for awhile prior to the plug going out.
Well if it is piston slap, that hammer and nail theory would explain that. It isn't one huge hit that is the problem, it would be gradual hits on the plug to the point where you don't get optimal spark. It would fall into that range of the occasional bad spark, and gradually get worse as the gap closes, to where it just won't spark anymore (probably once there is no gap).
Lil_vicious559
Banned
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- Mazdaspeed 6
I think i have the answer to you're question. If your gaps keep getting closed on Ur spark plugs. You have a bad piston or your butterfly flaps fell into one of the cylinder chamber ports and the screw is stuck in cylinder port #4 causing the piston to push up on Ur spark plug.
This happened on my 02 SE-R. The butterfly flaps are known to be loose on the screws. Sure enough happened to me. I took apart my manifold and the Flap was stuck inside of cylinder port#4. Car would go into limp mode after 4000rpms and would sound like a WRX. Here's what it looked like:
On the left is what happened to cylinder port #1 on my SE-R
lol, ok. I'll do it live.
Lil_vicious559
Banned
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- Mazdaspeed 6
You need to take apart your manifold. and check you're cylinder ports. I bet the butterfly flap came loose and the screw to the flap got stuck inside your cylinder port bouncing around causing the piston to rise up and close the gap.
This may be ur problem. happens usually when you go WOT. Fortunately on the Sentra SE-R's. This has been a known problem. The screws are known to be loose on the butterfly flaps. When you got WOT the flaps open up
This may be ur problem. happens usually when you go WOT. Fortunately on the Sentra SE-R's. This has been a known problem. The screws are known to be loose on the butterfly flaps. When you got WOT the flaps open up
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- MSP 1145
it's a known problem to the proteges too.
Lil_vicious559
Banned
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- Mazdaspeed 6
If that's the case, Then that might be the problem. My friend who's a mechanic couldn't figure out what was wrong with it. He really didn't have time to rip apart my head and figure out what was wrong. So i did it myself. Sure enough i went on b15sentra.net and asked. They said it was common for the 02-03 SE-R's to have loose screws on the flaps causing it to fall off and get stuck into the cylinder ports.
