cyl 4 misfire
2 Attachment(s)
Driving me crazy. Happened on my second run on Sunday. Got back on the gas after turn 2, no power and sounds like a ------- subaru. MIL flashing. p0304. Fluids didn't mix, nothing out the tailpipe so driving home on 3 cylinders wins vs tow truck.
#4 plug is black. Cleaned up and swapped out with another cylinder. p0304. coil swapped. p0304. All 4 plugs spark. Pull upper im, walls are coated with gas. Injectors all measured 13 ohm. Stock measured 12. Surely it must be an injector then. Swapped the stock back in, put everything back together. p0304. w.t.f https://lh3.googleusercontent.com/-s...404_191052.jpg |
Oh yeah. Cam cap was loose
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Sounds like it might be running rich, and since cyl. 4 is usually the hottest with a stock cooling configuration, it would be affected first. Any signs/sounds/visuals of detonation events? I assume this happened at the track? If you're running so rich that their is gas sitting on the inside of the intake manifold, I'd start looking for things that would cause the ECU to send extra fuel.
FWIW, if you do not clear the ECU between tests, the codes will remain. Don't know if you tried that. |
yeah i hear that running rich is a common cause of broken camshafts.
Do I need anything to install a new exhaust cam? new caps? Maybe a torque wrench to smash into the shop tech's head that rebuilt my head not 200 miles ago? |
Almost sounds like injector 4 is shorted open in the harness somewhere.
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if it's constantly on #4, it has to be the #4 injector, plug, plug wire, or valves/rings.
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With only 2 of the 3 cams rotating, exhaust valves on #4 never open. yes, I have 3 cams now. See?
https://lh3.googleusercontent.com/-_...404_194857.jpg |
more cams more powah!
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Holy sh!t!!!
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It's my patented triple overhead cans TOHC (tm). My car is full of win this year. Fully expect it to spontaneously implode when the MS2 gets installed.
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A little jb weld and she'll be just fine. just make sure its timed right! lol
Holy ---- that sucks. |
Wow.
What a man you are. |
snapped cam was going to be my guess...that was until i made it far enough in the thread to get to your photo.
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Wow. Wow!
So the next question is, after having driven home with the cam faces grinding against each other, are you going to do anything to clean the motor out? Or just clean out the valve cover area and call it good. |
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How often does this shi really happen?? And wtffff
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Maybe the shop that left the cam cap loose 200 miles ago owes you an engine?
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DAMN! That hasn't even happened to Faeflora yet. :bowrofl:
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Originally Posted by Mobius
(Post 860695)
Wow. Wow!
So the next question is, after having driven home with the cam faces grinding against each other, are you going to do anything to clean the motor out? Or just clean out the valve cover area and call it good. I figured an oil/filter change would take care of any bits of shaft. The small piece didn't look like there was much in the way of damage, but I never looked at the big piece. 200 miles is a common OCI right? |
Originally Posted by hornetball
(Post 860804)
Maybe the shop that left the cam cap loose 200 miles ago owes you an engine?
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