Cylinder 1 Misfire
#22
Senior Member
Unique Scionikz
SL Member
Join Date: Mar 2007
Location: Alhambra, California
Posts: 244
I'm having the same issue on number 4! I can't seem to figure out why. Turns out the threading was messed up, burnt the spark plug and coil, replaced both, fixed threading with insert, and still misfiring. I then swapped injector 3 with 4 to see if misfire would change cylinders and it didn't. Still get misfire on 4. any ideas?
#23
Hello,
I had the same problem on my 06 yesterday. 301 error, running rough, lights on dash on and off like Christmas lights. I pulled the #1 plug and it was all rusted. The other 3 were fine. I replaced all 4, but noticed that #1 plug tube had a greasy gunk to it. After cleaning it the first time everything was fine. Today, I drove my 200 mile commute and it started again as I got into it to come home. I got home, pulled the coil, and there is water in the plug tunnel. I run the engine with the cover off, and it has been raining today, but I do not see any evidence of water on top of the engine. Is it possible my head gasket is leaking into the plug tunnel?
Help, I need to go to work tomorrow morning at 6!
I had the same problem on my 06 yesterday. 301 error, running rough, lights on dash on and off like Christmas lights. I pulled the #1 plug and it was all rusted. The other 3 were fine. I replaced all 4, but noticed that #1 plug tube had a greasy gunk to it. After cleaning it the first time everything was fine. Today, I drove my 200 mile commute and it started again as I got into it to come home. I got home, pulled the coil, and there is water in the plug tunnel. I run the engine with the cover off, and it has been raining today, but I do not see any evidence of water on top of the engine. Is it possible my head gasket is leaking into the plug tunnel?
Help, I need to go to work tomorrow morning at 6!
Why are some of you saying it's a head-gasket issue? The head gasket wouldn't put water into the tube, since the gasket is BELOW the head (where the plug is). Even if the valve cover gasket (not the same thing) was leaking, show me where the "water" would be getting in? It's nothing but oil and cams in there. Here's mine:
Last edited by Harvey; 12-06-2012 at 02:12 AM. Reason: Going into a tad more detail about rust/water.
#25
Thanks to this forum I fixed it. Thank you all.
Hello All,
I wanted to share with you that I had run into the running rough and low end power loss in my 2005 xB. Thanks to you all in this forum that contributed your solutions to my problem my scion is repaired and running ever so smoothly again. At first noticing the problem while driving in town I was worried at first large costly repair bills here we come. Thanks to this forum I was able to troubleshoot the problem with codes from the computer code reader that Cylinder 1 was misfiring. At first I checked and changed plugs just for good measure and small indications on them needing too. I also changed the coil pack of cylinder 1 and bang that was it. I also ordered 3 other coil packs just to have on hand or should I replace all at once or maybe pairs or just leave it alone? Any recommendations?
Thank you all again for this great forum and the great folks contributing.
I wanted to share with you that I had run into the running rough and low end power loss in my 2005 xB. Thanks to you all in this forum that contributed your solutions to my problem my scion is repaired and running ever so smoothly again. At first noticing the problem while driving in town I was worried at first large costly repair bills here we come. Thanks to this forum I was able to troubleshoot the problem with codes from the computer code reader that Cylinder 1 was misfiring. At first I checked and changed plugs just for good measure and small indications on them needing too. I also changed the coil pack of cylinder 1 and bang that was it. I also ordered 3 other coil packs just to have on hand or should I replace all at once or maybe pairs or just leave it alone? Any recommendations?
Thank you all again for this great forum and the great folks contributing.
#26
Cylinder 1 Misfire
My girl friend's XA had the same problem. As background I have 40+ years background in auto repair and a degree in the field. First it is not a head gasket issue, the water is clear or a little dirty but has no coolant smell. After cleaning the spark plug well and having the problem return a few days later, I looked at it in the day light. Rain water (home is Portland, OR) is getting past the opening in the engine cover around the oil cap, my guess is the seal from the cowl to hood is weak, I have sealed the cap to cover area with some clear packing tape to make a water tight tent "Over Troubled Waters". I will test for a couple of weeks and report back. 10 cent fix. Make sure to dry the plug well and not drive the car with the MIL flashing, the miss can hurt the Cat Converter or cause a coil to fail. Enjoy.
#27
4 months later and my box hasn't done it again. The last thing I did was to change the fuel injector on the bad cylinder indicated. I still suggest following my earlier post about trying to diagnose the issue.
Good luck if you have the problem. If you want to ask me any questions you can message me directly. Not sure what help I'll be, but I'm willing to offer what I can.
Good luck if you have the problem. If you want to ask me any questions you can message me directly. Not sure what help I'll be, but I'm willing to offer what I can.
Thank,
Rick
#28
As far as how to remove the injector, it would take me forever to type. I used a scion repair Manuel to walk me through it.
#30
cylinder 1 blew
i'm afraid to ask but my 05 xA made a loud noise while i was driving on the freeway, which made idle like it was going to stall. there was an obvious lost of power and idle was unstable like it was goin to stall. i was still able to drive but at the same was scared. i eventually made it home to discover that my valve cover was cracked. as i removed the cover, i noticed right away that the cyclinder boot blown off and out the spark plug well. my car was making this ticking noise before it blew, i wasnt sure what it was since it was the first time i heard it. as far as i can see, the well seems dry and i don't see oil or coolant. the tip of the spark plus is mangled from the explosion. i use NGK iridium plugs, and noticed the tip and medal flange is now touching but i'm assuming that was caused when it blew. i am lost for words and uncertain what to do next. please help, any advice will be useful. thx in advance.
#32
My 2006 box just had the 3 stooges pop up too, after weeks of telling my mechanic something was wrong. My a/c is out, been out for 2 months, mechanic doesn't know what's wrong, then the transmission has been funky for several weeks, now the lights. Took it to O'Rielly's and coded as cylinder 1 misfire. Bought spark plugs. Hoping this is all that's wrong with my beloved square mobile. Any idea what could be causing my a/c issues? I've replaced the serpentine belt twice. I'm at 140,000
#33
Swap coil pack from another plug to check it. Cylinder 1 sometimes gets water in it from car washes, etc and shorts out. This has happened to me, especially if you have an aftermarket grill. It may be in a sort of limp mode if you have the stooges on. First thing you need is your own code reader so you can check it and more importantly to delete the codes. Buy a cheap 40 dollar one. Not specific on why you replaced the belt. If it broke due to squealing then your compressor is going out.
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