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Old 09-30-2009, 01:19 PM   #1
coqui2004miguel
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02 WRX Bugeye
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Default Cylinder 3 misfire

Anyone have an extra coil pack I could borrow to see if my coil pack is bad? I havent tried moving it around to see if the problem follows but will most likely do it today.
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Old 09-30-2009, 02:23 PM   #2
TurboSetch
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Pull the plug out while your there and take a look.
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Old 09-30-2009, 02:35 PM   #3
Brando5185
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He has already replaced the plugs.
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Old 09-30-2009, 02:50 PM   #4
Marlons101
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well he still needs to move that coilpack around.

I had the samething going on with my engine before it seized...but I think it was my headers hittin the subframe sending the missfire...
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Old 09-30-2009, 03:40 PM   #5
TurboSetch
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Thats not the point. Look at the plug and better yet compare it to the one next to it. These misfire codes tend to lie about which cyl is really having the issue. Sometimes you can tell just by looking at the condition of the plug vs another.

The car determins a misfire from the crank angle sensor. Check to be sure its secure. You could also have internal engine problems. A leak down or compression test would be the next move if the coil pack swap fails. Just keep in mind you might be chasing the wrong cyl so move it around.
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Old 09-30-2009, 04:58 PM   #6
coqui2004miguel
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Roger that Seth. I dont even know the numbers on the cylinders...Looking at the engine bay from the front, the back left cylinder plug had oil on it. I know my car has been smokin a bit for the past 2 months and losing oil.
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Old 09-30-2009, 05:23 PM   #7
tribalwrx
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ok left side is 2 and 4 and right side is 1 and 3, if your sitting in the drivers seat not looking at it
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Old 09-30-2009, 07:17 PM   #8
coqui2004miguel
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so sitting in the drivers seat it looks like this ?
2 1
4 3
-------Firewall-------
Drivers Pasenger
seat seat
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Old 09-30-2009, 07:30 PM   #9
tribalwrx
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yep it is
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Old 09-30-2009, 07:44 PM   #10
Marlons101
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nice dia
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Old 09-30-2009, 11:28 PM   #11
Wrbimprezasti
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your cars acting up to miguel? i still havent traced my problem down to see if its my damn o2 sensor yet...=(
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Old 09-30-2009, 11:33 PM   #12
greenspeed
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I was having a cyl 3 misfire code on my ej205, turned out to be a fuel filter after switching around coil packs, plugs, and a compression test. Go spend the $20 and see if it goes away. you should replace the fuel filter often anyways
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Old 09-30-2009, 11:41 PM   #13
coqui2004miguel
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Ok, I will be switching the coil packs around first to see if it traces back. If it stays i will go for the Fuel Filter. Thats the little baggy thing attached to the Fuel Pump right?
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Old 09-30-2009, 11:43 PM   #14
coqui2004miguel
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Quote:
Originally Posted by Wrbimprezasti View Post
your cars acting up to miguel? i still havent traced my problem down to see if its my damn o2 sensor yet...=(
Yeh man it wont stop throwing the cylinder 3 misfire. The blinking CEL light is really getting on my last nerve .
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Old 09-30-2009, 11:56 PM   #15
ridestreet84
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if you want to do a compression test get with me i have the tester to do one
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Old 10-01-2009, 04:55 AM   #16
greenspeed
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Quote:
Originally Posted by coqui2004miguel View Post
Yeh man it wont stop throwing the cylinder 3 misfire. The blinking CEL light is really getting on my last nerve .

whoa whoa whoa...totally different scenarios. Type A misfires cause a CEL to blink because it is detrimental to the cat. It is flashing to let you know that the conditions it is running at can cause the cats to overheat break down and fail.

You're not geting a solid CEL I'm guessing scenarios chance. Compression test should be done first and quickly, also check the condition of your turbo, look for leaking injectors, along with condition of the plugs.

Basically get the car warmed up, take the packs off plugs out (mark where each one went) compression test each cylinder, should be within 10% of each cylinder. Mine were at 105, 110, 110, 109 so I was good, but my numbers were lower cause it was cold, what is important is if the number are close to each other.

What mods do you have done?
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Old 10-01-2009, 03:02 PM   #17
TurboSetch
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Doesn't have to be hot since your looking for a major difference between cyls. Numbers will read a little lower thats all. Stock pistons don't expand much. I only say this because it sucks doing the test with a hot motor.

The only O2 sensor that the ECU really listens to is the front one. The rear one is to check the catalyst performance. I have read a little about people saying the rear O2 was causing issues but I just don't see how. More research here perhaps.
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Old 10-01-2009, 03:11 PM   #18
coqui2004miguel
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Quote:
Originally Posted by greenspeed View Post
whoa whoa whoa...totally different scenarios. Type A misfires cause a CEL to blink because it is detrimental to the cat. It is flashing to let you know that the conditions it is running at can cause the cats to overheat break down and fail.

You're not geting a solid CEL I'm guessing scenarios chance. Compression test should be done first and quickly, also check the condition of your turbo, look for leaking injectors, along with condition of the plugs.

Basically get the car warmed up, take the packs off plugs out (mark where each one went) compression test each cylinder, should be within 10% of each cylinder. Mine were at 105, 110, 110, 109 so I was good, but my numbers were lower cause it was cold, what is important is if the number are close to each other.

What mods do you have done?

I have a leaky injector. It blinks from time to time. Im now getting a heater bank 2 CEL.

As far as mods I'm an sti without motor and tranny. Pink injectors, vf39 and supporting mods.
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Old 10-01-2009, 08:47 PM   #19
tribalwrx
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Quote:
Originally Posted by coqui2004miguel View Post
Ok, I will be switching the coil packs around first to see if it traces back. If it stays i will go for the Fuel Filter. Thats the little baggy thing attached to the Fuel Pump right?

no the fuel filter is on the the drivers side strut mount, that is a filter on the fuel pump but not the main fuel filter for our cars, also when you change it let it drain out as much as possible then spray some brake clean in it and smack it a few times on the ground then pour the brake clean out and you'll see just how dirty your filter was
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Old 10-01-2009, 08:48 PM   #20
tribalwrx
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pick up a new fuel filter at conti for around $30 i think might have been 26.95 give andrew a shout about it
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Old 10-02-2009, 07:40 PM   #21
coqui2004miguel
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Sounds good. When by FATS Auto and picked up new O-rings for the injectors and will perform the rest of the stuff this weekend. Turns out the flashy light is my O2 Sensor.
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Old 10-04-2009, 01:00 AM   #22
coqui2004miguel
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Well I changed out the O-rings on the leaky injector and i havent got the misfire again. I did realize tho I never put back the black cap underneath the injectors on the drivers side and now i cant find it. Im not sure what its called but Marlon said it was a breather so Ive been leaking air through there since i first did the injector upgrade back in February. Im not sure what affects this has on my engine but if anyone has one or knows of where to get one, and the name of the part, it would greatly be appreciated.
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