misfire issue

ToXic3

ToXic3

Greenie N00B Member
Greenie Member
So here's my story.. Saturday went to Dyno Day at a local shop. Put car on Dyno and it wasn't reading my car, (this was my first dyno experience so I thought they went into obd port) he tapped into Cylinder 1 at the coil pack. So I then take the car off dyno and that's when the fun started. I popped a cylinder 1 misfire code so I swapped it with cylinder 4 coil and popped cylinder 4 code. Bad coil right? well this morning I got new coil from Mazda dealer and still misfire and the misfire still following the coil pack. Has anybody ever had this issue before? Im thinking its a wiring issue but the misfire follows the new coil pack and wires and connections look good??? CHIT
 
So even swapping the new coil pack around, does the issue carry over? the fact it moved leads the whole "check the gap" out of the equation.

There is the stretch the coil wire trick too, its posted online, maybe on the old forum, on how to do that.

Oh, and most importantly, what was the hp/tq on the dyno, lol.
 
yes, I put new coil on 1 misfire cyl.1, put coil on 4 misfire cyl.4. I didn't get to do anything on they dyno because they couldn't get a reading from my car. They hooked the car up told me to start it, once car started dyno guy said "its not reading your tach" . I don't know wtf happened? Could a dyno f up my car? it ran perfect on the way there I took 2 logs and sent to Tuna and he even said shit was good!
 
Either new is defective or maybe the springs need stretched. pop the pack apart, pull out the spring. Based on the how to, stretch apart the smaller sections of springs between 1/4 and 1/2'', and reinstall.
 
Raider said:
Either new is defective or maybe the springs need stretched. pop the pack apart, pull out the spring. Based on the how to, stretch apart the smaller sections of springs between 1/4 and 1/2'', and reinstall.
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I will try the stretch "mod".
 
Ok, my friend has a speed 3 and im going to swap my new coil with his car to see if coil works. I have to wait till Friday now for new one from Mazda. Bummer
[doublepost=1463594460][/doublepost]I talked with Mazda tech and he spoke of PCM.. well fuck me running backwards!!!! Although this is the same tech that told me I had fp internals hitting 1700-1800psi max so.
[doublepost=1463623125][/doublepost]coil packs worked in my friend Speed 3 so I went home and did a little tinkering and narrowed it down to cylinders 1 & 4 I swapped all the coil packs around 12234 and the misfire is only happening with one and four I switch them around and it jumps back and forth from 1 to 4 what the hell man
 
now that is fucking weird man.
 
well I got it running right and no more misfire.. My last thought (should have done it first) was to check the plugs and sure as shit cylinder #1 was loose and needed to be re-gapped. Ok I understand that, but why was the misfire following the coil on 1 and 4???? it was literally 1 plug and I assumed the whole time it was the coil.
 
That is indeed bizarre. There was no real reason for plugs as a cause since the issue followed.
Chalk it up to a P666 error. Car controlled by Satan
 
Raider said:
That is indeed bizarre. There was no real reason for plugs as a cause since the issue followed.
Chalk it up to a P666 error. Car controlled by Satan
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Exactly
[doublepost=1463707308][/doublepost]I don't think my car like NGK's I might switch back to Denso. This is 2nd issue I have had with the NGK.
[doublepost=1463707604][/doublepost]Got some free coils out of it though.
 

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Denso has a bad history of spitting electrodes onto the pistons and opening up the gap like a hooker's legs on Saturday night. Keep an eye on em.
 
Well I'll be damned. Plug definitely would have been my next guess. Did you by chance check the gap on them all?
 
I do not get how it followed, if it was the plug. That was a static variable. Unless when moved, the other coil was not touching the plug enough, and the cyl 1 plug did. Just weird.
 
My wife's cx-7 is doing the samething. Did injectors because of slow acceleration. Did plugs cause I was that deep so why not. Get it back together and it was missing on cyl3 swap coils and plugs with cylinder 4 and it moves to that cylinder. So I'm like bad coil. Get a new one and put it in and still missing on cylinder 4. So I swap the coil with cylinder 3 and it's still missing on cylinder 4. So I swap plugs and it moves to cylinder 3. So I get another new plug and put it in and now the miss is on cylinder 4. Wtf
 
Might be a coil wire issue. Stretch the spring in the coil wire.
 
James b 87 said:
How do you do this?
Click to expand...
Saw this on another forum.

Pull the coil pack apart and stretch the wire in the middle.

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