Cylinder 4 misfire? - Page 5

WaniuszY · 06-02-2008, 02:17 PM

I guess I'm next.
I noticed the car vibrating more on idle and minute later cruise started blinking along with Check Engine. P0304. :-( I drove it back to the house like a granny and everything seemed fine unless I stopped. My dealership is 150miles away. Is it safe enough to drive to them if I drive extra gentle? I don't want to spend any money on something that might turn out to be unnecesarry because I will have to take it to them anyway.
My car is BONE stock. 07 of course.
I didn't notice any extra smoke from the tailpipe but after reading this thread I cranked it up to check oil level and it was low and smoke was coming from underneath the oil cap. Not really big but kinda like you leave cigarette burning.

Oh men...

Kamrulz4ever · 06-02-2008, 02:26 PM

Ouch... Sorry to hear that. How many miles do you have on your car?

starxidiam · 06-02-2008, 02:33 PM

dang....im sorry. i would have never thought it would have happened to me.

WaniuszY · 06-02-2008, 02:49 PM

15k miles on it.
On idle engine rocks back and forth in the bay.

Kamrulz4ever · 06-02-2008, 02:58 PM

Time to get it to the dealership, get her fixed. Make sure to get an EM this time.

WaniuszY · 06-02-2008, 06:21 PM

This is the smoke coming out from my oil cap. Is this definitely mean that one rings are busted on a cylinder? Oil is hot. Maybe this is normal?
Video was taken right after killing the engin after it's been idling for 3 minutes.
Totally no smoke out of exhaust.
Oil Cap Video

Share your 0.02 please.

atanarus · 06-02-2008, 06:31 PM

That's definately too much smoke. I didn't notice any when I did the exact same test a week ago. With the engine running, you can notice a puff or two every now and then in sunlight. I would get a compression test first.

WaniuszY · 06-04-2008, 08:24 AM

Since I've got like 150 miles to my dealer, I will be doing compression test today replaing spark plugs at the same time and checking all connections to rule out something simple.
Will let you know how it went.

Flycaster · 06-04-2008, 08:40 AM

Quote:

Originally Posted by WaniuszY

...Video was taken right after killing the engin after it's been idling for 3 minutes...Share your 0.02 please.

A little smoke coming out of the tube with the motor off doesn't tell you a thing. Take another video, this time with the car running at idle - have a friend rev the motor to 2K and hold it there. If a ringland is busted, it'll push a lot of smoke and pressure - if everything is OK, there will be a slight vacuum, with zero smoke.

WaniuszY · 06-04-2008, 10:16 AM

I will do that right after work. Appreciate the input.
Will correct compression test definitelly eliminate possible ringland/piston damage?

Flycaster · 06-04-2008, 01:58 PM

Quote:

Originally Posted by WaniuszY

...Will correct compression test definitelly eliminate possible ringland/piston damage?

Absofrgigginlutely - that's why it is usually the first step in diagnosing a misfire problem. However, the smoke/puff oil tube test will tell you if you have a piston that isn't sealing properly, provided the breather system is nominal.

WaniuszY · 06-04-2008, 05:09 PM

I don't need to check nothing no more. My jug #4 is officially low on compression.

Pass | Driv
135 45
142 130
-----------
Front Clip

BTW: They should've hang Moore before he wrote his laws. The infamous Cyl #4 is pain in the A to get to. I have shop service manual for 06 STi and it says about removing battery and windshield asher reservoir. Well in 07s above mentioned tank is at the front clip so taking it out won't help. It's soo hard to take the coil pack out because there is VERY little space between the engine block and the frame. You have to use the fact that coil pack's tube is made of rubber and need to make it;s way out forcing it a little.

WaniuszY · 06-04-2008, 05:45 PM

Wonder how long it will take the dealer to fix it. I can't live without my car......

Mexitr0n · 06-04-2008, 06:03 PM

Quote:

Originally Posted by WaniuszY

Wonder how long it will take the dealer to fix it. I can't live without my car......

I just got my 06 back with a new stock short block and heads after a constant P0304 and low compression in that jug (32kmi under warranty).

Took the dealership 2.5 months to rebuild the motor. I don't think thats what you wanted to hear but thats the reality. BTW I took that loaner and beat the living crap out of it every single day out of anger.

Flycaster · 06-04-2008, 06:27 PM

2 and a half months? Boy, did they put you on the back burner or what? That's a 1 day job for 2 good mechanics.

If that had been me, the loaner would've come back in chunks.

06-02-2008, 02:17 PM	#61
WaniuszY Junior STI Driver Car: 07 STi Ltd Fav Mod: ECU Tuning that I haven't done yet... Location: Montgomery, AL Posts: 76 Join Date: Jul 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? I guess I'm next. I noticed the car vibrating more on idle and minute later cruise started blinking along with Check Engine. P0304. :-( I drove it back to the house like a granny and everything seemed fine unless I stopped. My dealership is 150miles away. Is it safe enough to drive to them if I drive extra gentle? I don't want to spend any money on something that might turn out to be unnecesarry because I will have to take it to them anyway. My car is BONE stock. 07 of course. I didn't notice any extra smoke from the tailpipe but after reading this thread I cranked it up to check oil level and it was low and smoke was coming from underneath the oil cap. Not really big but kinda like you leave cigarette burning. Oh men... This ad is not endorsed by this member. Please register or login to hide this ad.

06-02-2008, 02:26 PM	#62
Kamrulz4ever Junior STI Driver Car: OBP 2007 STI Fav Mod: Brake dust Location: Buffalo, NY Posts: 110 Join Date: Dec 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? Ouch... Sorry to hear that. How many miles do you have on your car?

06-02-2008, 02:33 PM	#63
starxidiam STI Driver Car: UGM 07 WRX STi Fav Mod: Coming Soon Location: South Carolina Posts: 288 Join Date: Dec 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? dang....im sorry. i would have never thought it would have happened to me.

06-02-2008, 02:49 PM	#64
WaniuszY Junior STI Driver Car: 07 STi Ltd Fav Mod: ECU Tuning that I haven't done yet... Location: Montgomery, AL Posts: 76 Join Date: Jul 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? 15k miles on it. On idle engine rocks back and forth in the bay.

06-02-2008, 02:58 PM	#65
Kamrulz4ever Junior STI Driver Car: OBP 2007 STI Fav Mod: Brake dust Location: Buffalo, NY Posts: 110 Join Date: Dec 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? Time to get it to the dealership, get her fixed. Make sure to get an EM this time.

06-02-2008, 06:21 PM	#66
WaniuszY Junior STI Driver Car: 07 STi Ltd Fav Mod: ECU Tuning that I haven't done yet... Location: Montgomery, AL Posts: 76 Join Date: Jul 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? This is the smoke coming out from my oil cap. Is this definitely mean that one rings are busted on a cylinder? Oil is hot. Maybe this is normal? Video was taken right after killing the engin after it's been idling for 3 minutes. Totally no smoke out of exhaust. Oil Cap Video Share your 0.02 please.

06-02-2008, 06:31 PM	#67
atanarus Junior STI Driver Car: UGM 07 STI Fav Mod: Driver Location: Fairfax, VA Posts: 115 Join Date: Oct 2007 Trader Rating: (0)	Re: Cylinder 4 misfire? That's definately too much smoke. I didn't notice any when I did the exact same test a week ago. With the engine running, you can notice a puff or two every now and then in sunlight. I would get a compression test first.

06-04-2008, 08:24 AM	#68
WaniuszY Junior STI Driver Car: 07 STi Ltd Fav Mod: ECU Tuning that I haven't done yet... Location: Montgomery, AL Posts: 76 Join Date: Jul 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? Since I've got like 150 miles to my dealer, I will be doing compression test today replaing spark plugs at the same time and checking all connections to rule out something simple. Will let you know how it went.

06-04-2008, 10:16 AM	#70
WaniuszY Junior STI Driver Car: 07 STi Ltd Fav Mod: ECU Tuning that I haven't done yet... Location: Montgomery, AL Posts: 76 Join Date: Jul 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? I will do that right after work. Appreciate the input. Will correct compression test definitelly eliminate possible ringland/piston damage?

06-04-2008, 05:09 PM	#72
WaniuszY Junior STI Driver Car: 07 STi Ltd Fav Mod: ECU Tuning that I haven't done yet... Location: Montgomery, AL Posts: 76 Join Date: Jul 2007 Trader Rating: (1)	Rip: Infamous Cylinder #4 misfire - low on compression. :( I don't need to check nothing no more. My jug #4 is officially low on compression. Pass \| Driv 135 45 142 130 ----------- Front Clip BTW: They should've hang Moore before he wrote his laws. The infamous Cyl #4 is pain in the A to get to. I have shop service manual for 06 STi and it says about removing battery and windshield asher reservoir. Well in 07s above mentioned tank is at the front clip so taking it out won't help. It's soo hard to take the coil pack out because there is VERY little space between the engine block and the frame. You have to use the fact that coil pack's tube is made of rubber and need to make it;s way out forcing it a little. Last edited by WaniuszY : 06-04-2008 at 05:13 PM.

06-04-2008, 05:45 PM	#73
WaniuszY Junior STI Driver Car: 07 STi Ltd Fav Mod: ECU Tuning that I haven't done yet... Location: Montgomery, AL Posts: 76 Join Date: Jul 2007 Trader Rating: (1)	Re: Cylinder 4 misfire? Wonder how long it will take the dealer to fix it. I can't live without my car......

06-04-2008, 06:27 PM	#75
Flycaster S204 Racer Posts: 3,001 Join Date: Apr 2004 Trader Rating: (0)	Re: Cylinder 4 misfire? 2 and a half months? Boy, did they put you on the back burner or what? That's a 1 day job for 2 good mechanics. If that had been me, the loaner would've come back in chunks. This ad is not endorsed by this member. Please register or login to hide this ad.