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Old December 2nd, 2012, 03:56 PM   #1
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CEL All Cylinder misfire, flashing lights, but...

I have a CEL P1078 from removing my intake manifold butterfly system that the 6-speed have, i regret it Just the other day i gave my car a WOT 1st-3rd gear. Midway through my CEL started flashing at me. Car didnt feel any different, no stumbling or any indication of why it would be flashing.

Got the code read and there was a misfire in 1st & 5th cylinder, random cylinder misfire, O2 sensor stuck lean, and the P1078 code. Cleared it and gave it another 1st-2nd WOT and no lights or anything. Park the car, then start it again and i get the CEL. Go run the codes and its P1078, 1,2,3,4,5,6 cylinder misfire, O2 sensor stuck lean, and random cylinder misfire.

Bear in mind that i dont feel any misfiring at idle, cruising, or WOT. I had a Honda Master Tech drive it and he didnt feel anything weird. If the CEL hadnt come on, i would have never thought something was wrong. I still get about 31mpg. No signs of anything wrong

Thoughts?
P.S. 96k on car, never changed plugs or timing belt
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Old December 2nd, 2012, 06:47 PM   #2
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I'm curious too.. Similar this happened Friday night :-(
It stopped but I'm very worried it will come back :-(
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Old December 2nd, 2012, 06:57 PM   #3
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I'm curious too.. Similar this happened Friday night :-(
It stopped but I'm very worried it will come back :-(
Im just baffled that im not feeling any of this, and there are no physical signs indicating it. Did you just have flashing lights or did you feel the misfire?
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Old December 3rd, 2012, 06:57 PM   #4
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Bump
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Old December 3rd, 2012, 07:12 PM   #5
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did it suck something up that it wasn't suppose to? Vacuum leak? Check your sparks?
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Old December 3rd, 2012, 07:17 PM   #6
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did it suck something up that it wasn't suppose to? Vacuum leak? Check your sparks?
Nope, No vacuum leak. Im planning on getting a PCM update on saturday for free, see if that fixes the O2 sensor issue
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Old December 3rd, 2012, 07:30 PM   #7
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good luck
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Old December 4th, 2012, 07:02 AM   #8
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friend of mine with a TL had the same issue. turned out to be a bad coil. just a suggestion
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Old December 4th, 2012, 07:26 AM   #9
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I had the same problem... Bad coil...
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Old December 4th, 2012, 07:44 AM   #10
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Grrr stupid coils. Anyone know the ohms resistance range to test the coils
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Old December 4th, 2012, 07:58 AM   #11
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Issue im having with the bad coil theory is the car is not misfiring. Could be bad gas, but the car isnt misfiring. Yet there still is a code. Im getting my ECU updated for free this Saturday. Hopefully this fixes the issue
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Old December 4th, 2012, 08:00 AM   #12
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I don't know the impedance, but sh1t man. That really sucks. I agree and say bad coil. If you're going to change one of your coils, you might as well do the plugs as well. I'd also do the TBelt sooner rather than later. Don't wait like me until almost 105K (still haven't done it yet). I have piston slap when I start the car and the belt squeaks a bit from time to time.

What's the deal with this ECU update?
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Old December 4th, 2012, 08:07 AM   #13
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I don't know the impedance, but sh1t man. That really sucks. I agree and say bad coil. If you're going to change one of your coils, you might as well do the plugs as well. I'd also do the TBelt sooner rather than later. Don't wait like me until almost 105K (still haven't done it yet). I have piston slap when I start the car and the belt squeaks a bit from time to time.

What's the deal with this ECU update?
My friend who is a Honda tech is gonna do my T-belt for $300 + parts hopefully before this upcoming autocross season.

On a side not, a local speed shop that builds Supras, GT-Rs, and RX-7s agreed to do my clutch (impending doom) for $300 if i bring my own parts

Update for 03-04 (i think) and basically the computer reads the O2 sensor wrong for an instant. And causes a code "stuck lean" and throws out misfire codes all around. Usually happens only on cold start. The update fixes this issue.
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Old December 4th, 2012, 08:22 AM   #14
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^ Get that update. Those are great prices for the clutch/TBelt. If I go to the track this weekend, I'm going to do the TBelt soon after. Might as well go ahead and do the valve adjustment too, but we'll see.
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Old December 4th, 2012, 08:27 AM   #15
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Yep gonna do the update before i start replacing things, ill post back afterward
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Old December 4th, 2012, 08:36 AM   #16
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make sure they know how to do the preset on the clutch.
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Old December 11th, 2012, 07:31 AM   #17
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FFFFUU*CCKKK. I was merging and when i hit 3rd gear it started flashing. Still no physical sign of it misfiring. I still need that update
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Old December 11th, 2012, 09:30 AM   #18
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If you had a single coil bad, all of your cylinders wouldn't be misfiring, so i doubt its a coil. If you need some to test I have all my old ones of my old motor in my garage.

You're not going to feel a single misfire ever unless you are misfiring ALL the time, which it sounds like you are not.

Still think its gas or your IM.
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Old December 11th, 2012, 09:50 AM   #19
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If you had a single coil bad, all of your cylinders wouldn't be misfiring, so i doubt its a coil. If you need some to test I have all my old ones of my old motor in my garage.

You're not going to feel a single misfire ever unless you are misfiring ALL the time, which it sounds like you are not.

Still think its gas or your IM.
Hopefully its gas, or the PCM update. Im getting the update in a few hours so we will see how it goes from there.
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Old December 11th, 2012, 11:19 AM   #20
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Quote:
Originally Posted by pbook4g5 View Post
If you had a single coil bad, all of your cylinders wouldn't be misfiring, so i doubt its a coil. If you need some to test I have all my old ones of my old motor in my garage.

You're not going to feel a single misfire ever unless you are misfiring ALL the time, which it sounds like you are not.

Still think its gas or your IM.

What does the IM have to do with it?
This may be my issue..

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Hopefully its gas, or the PCM update. Im getting the update in a few hours so we will see how it goes from there.
What's the PCM update?!





I got the CEL again today.......................
Car drives fine though.. Idk what to do
The light doesn't flash like it did a while back
It just stays on. It used to flash during idle/complete stop a while back, but it just stays on now.
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Old December 11th, 2012, 02:07 PM   #21
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I got the CEL again today.......................
Car drives fine though.. Idk what to do
The light doesn't flash like it did a while back
It just stays on. It used to flash during idle/complete stop a while back, but it just stays on now.
Hurray my issue is fixed. My buddy updated my PCM today for free I found a deserted road and gave it a few WOT pulls. No flashing lights! Scanned OBD again, my only code is the IMRC which is expected.

The update was released at some point for a oxygen sensor issue. I will post the TSB after my friend prints it (later tonight). Matthew, my issue only occured at WOT... yours kinda sounds like the issue pbooks had. All his valves were bent...
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Old December 15th, 2012, 05:33 PM   #22
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Well..
My CEL is gone once again.
IDK?!
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Old December 18th, 2012, 06:50 AM   #23
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i had this problem, and it turned out my spark plugs were loose. so i torqued them to spec (13ft lbs) and the CEL went off. a few months later i went ahead and put new plugs in. havent had the CEL come on since. if the problem comes back for some reason, check the plugs. happy to hear the update worked.
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Old December 18th, 2012, 10:29 AM   #24
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i had this problem, and it turned out my spark plugs were loose. so i torqued them to spec (13ft lbs) and the CEL went off. a few months later i went ahead and put new plugs in. havent had the CEL come on since. if the problem comes back for some reason, check the plugs. happy to hear the update worked.
I checked my plugs too with a torque wrench. They were all good. Pulled a plug and it looked good too. Gotta do my first plug change with this car in 9k miles.
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Old December 18th, 2012, 01:17 PM   #25
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My plugs are brand new..
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Old December 27th, 2012, 01:00 AM   #26
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I have the same problem on my 6mt 04. This only happened once where i had a misfire in all my cylinders. I'm at 107k miles and haven't changed the timing belt yet.
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Old December 27th, 2012, 08:11 AM   #27
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I've been getting the "All Cylinders Misfire" code for the last 130K miles. The CEL is usually on solid, it will flash if the car idles for awhile and now and then it does stay off for a short time (maybe 1 day).

In my case, it's bent valves in 2 cylinders. I did over rev it bad 1 time. So my own fault and I know exactly what caused it.
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Old December 30th, 2012, 08:24 PM   #28
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I have the same problem on my 6mt 04. This only happened once where i had a misfire in all my cylinders. I'm at 107k miles and haven't changed the timing belt yet.
Get your ECU updated, fixed my issue. I read SOMEWHERE, cant find it now... that this affects 03-04 V6 cars.

As for the timing belt, shame on you. Should have done it in 2011 (7yrs) or at 105k. But dont feel bad, i havent done mine either . Nut im only at 96k so im only half as bad as you
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Old January 9th, 2014, 06:40 PM   #29
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If u haved redlined it then its either ecu needs updating or u have a coil pack or two going bad. They still work but the resistance isnt what it should be n it backs up the other cylinders from firing at the right time causing the multiple/random cylinder misfire & or codes for all 6 cylinders get a manual and follow process to test them. I had this n every one said bent valves. First off its a non interfering motor according to dealerso thats out.
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