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Discussion Starter · #1 ·
but it will start later in the day or when the temp is above -15°C (5°F) the car has a one year old battery, it has synthetic oil. Should we change the spark plugs? the car is 10 year old and they have never been changed.
 

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2008 Accent 3 dr 5 sp manual; 2010 Genesis Coupe 2LT track 6 sp manual
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That would be a good start. Put in some iridium plugs and then it will easily go for the rest of it's life on them.
 

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Discussion Starter · #3 ·
I will try that. Last year we changed the timing belt, the alternator, power steering and AC belts, the oil pan, the front brakes, the transmission fluid and the battery. The car has less then 49K miles so we wanna drive it to the ground if we can.
 

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OEM plugs are 30k change interval.
 

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Discussion Starter · #5 ·
OEM plugs are 30k change interval.
Thanks for telling me that. The Accent is my wife's car, she bought it used in 2008 and never did maintenance on it, I had to explain her about maintaining a car LOL I'm sure the spark plugs have never been changed in 10 years.
 

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I was surprised to see on my '08 that they just used regular plugs in it from the factory. I thought that went away the last decade. :)
 

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yeah i was skeptical about the plugs - usual go-tos aren't usually the issue, diagnostics nazi here - but 10 years?? yeah that would do it.

if you want to be cheap and use copper plugs, this is my method:

i pull the plugs once a year and clean them with a wire brush, inspect visually. if i see rounding/wear of the electrode or anything else abnormal, replace. otherwise, i'll just regap the things. copper plugs can last far longer than 30k - but they have to be cleaned and gap must be reset. its a bit of a judgement call.

easy way is to replace i guess. copper plugs aren't expensive after all. but, i'm cheap and lazy. don't want to go to the store unless i have to.
 

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Discussion Starter · #8 ·
Thanks, I bought NGK Iridium plugs yesterday, $20 a set of two, wow. I hope it's the problem. Now my fear is aluminum on steel tend to corrode. If the plugs have never been removed in 10 years they may be stuck in place. I don't wanna strip the threads.
 

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its less of an issue that you may think. you might get some good squealing out of the threads though :) no worries. if they were installed with anti-seize lubricant like they should have been, it won't be too bad.

use some on the plug threads for installing the new ones and put some dielectric grease on the wire connector tip. that will prevent the wires from seizing to the plugs. i've had to destroy a wire in the past because of someone ignoring this step...

whatever you do, just make sure the engine is stone cold.
 

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Discussion Starter · #10 ·
Thanks zero_gravity, I did like you suggested to me, I removed the old plugs, was easy. I set them to the correct gap, put some anti-seize and dielectric grease. Finally I think they have been changed in the past, the old plugs are NGK and don't seem that bad, judge by the picture. What do you guys think? I also did an oil change, synthetic with OEM filter. The car is ready for another spin :) I poored some injector cleaner in the gas tank. thanks for your help guys.
 

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Discussion Starter · #11 ·
I just drove my mom's brand new Accent, what an improvement over my wife's old 2004 Accent, feels like a boat lol
 

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well its no mystery what i think of the fuel/injector cleaners (*cough*crap*cough*) but good job with the plugs.

those are badly fouled, looks like the car might be running a tad rich by the colour but consider they've never been pulled you can't really say.

either way, those needed to be replaced badly. they look in good shape other than the colour. the plugs being so old could have caused the black fouling in itself.

if you want to get cheap later and if you're using COPPER plugs you can always pull them, clean with a wire brush and regap. just reapply the anti-seize/dielectric grease after. never try this with platinum or iridium.
 

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Discussion Starter · #13 ·
I don't think all fuel injector cleaners are bad, just do research on the net and buy the good one. There are hundreds of products out there, like everything else, a few of them are good.
 

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except that those cleaners are already in the fuel you buy. i'm not saying the cleaners are bad, just completely unnecessary with almost all the pump fuel out there now.

my school of thought on this is if the injectors are that badly clogged, its probably time to pull them and clean them properly. set up a reverse flow clean system with some tubing and a small compressor. ultrasonic bath is a great way to do it if you have access to one.
 

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Discussion Starter · #15 ·
It was cold this morning, I did the test, I started the car with the remote and it started very well :)
 

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except that those cleaners are already in the fuel you buy. i'm not saying the cleaners are bad, just completely unnecessary with almost all the pump fuel out there now.

my school of thought on this is if the injectors are that badly clogged, its probably time to pull them and clean them properly. set up a reverse flow clean system with some tubing and a small compressor. ultrasonic bath is a great way to do it if you have access to one.
^^^^ This.

Unless the car sits for long periods of time without running and you buy good fuel there is no need for the stuff, at least not in North America.

The SeaFoam treatments where you suck it right into the intake and then let the car sit have some merit. This will mix with the pcv waste oil that is pooled in the intake and get it out.
 

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^^^^ This.

Unless the car sits for long periods of time without running and you buy good fuel there is no need for the stuff, at least not in North America.

The SeaFoam treatments where you suck it right into the intake and then let the car sit have some merit. This will mix with the pcv waste oil that is pooled in the intake and get it out.
i have even less love for seafoam or the like. the engine is not supposed to be a clean place. regular oil changes and regular driving are all that is needed.

i have yet to see any evidence what so ever that seafoam or anything like it does a single good thing. seen some that could show its causing problems, nothing concrete. also some good evidence that it does a lot of nothing.

interesting to note that seafoam gets its name from being created as a marine fuel stabilizer - not a cleaner. just another pointless engine shampoo in my eyes.

but hey if it makes anyone sleep better at night, by all means. i'll stick with methods that i know work for me.

/end rant
 

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I'm not much of a SeaFoam guy. But at 100k there is going to be some oil coating and puddled in the intake.

If you have a catch can inline with the PCV valve it is even less needed.
 

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I'm not much of a SeaFoam guy. But at 100k there is going to be some oil coating and puddled in the intake.
it can do that all it wants for all i care. if my car still works i really don't care. i don't see how that small amount would matter if pulled into the intake considering it would be very unlikely to be all at once.
 

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Over time it builds up on the valves and valve stems. On my Coupe I have a catch can and the intake stays clean. I usually take the intake off sometime or another. But my Accent is nearing 100k miles and no catch can. I doubt if the blow by is as bad as on the 2L turbo. But I plan on pouring some lacquer thinner into the intake while it's running and clear 'er out!!!
 
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