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Old 11-30-2001, 06:22 AM   #1
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Default What could cause a cylinder not to fire?

I posted something similar to this not too long ago, but this is really bugging me.

What could cause a cylinder not to fire? I have pretty much everything replaced (plugs/injectors/injector clips/cap and rotor/MAP sensor/intake fuel pump/FMU/inline fuel pump) I think it has been doing this for a long time now.

Anyway, you guys should be honored that you know the owner of the fastest 3 cylinder turbo Integra out there!! Click the image to open in full size.

Please help guys!
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Old 11-30-2001, 06:24 AM   #2
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Default Re: What could cause a cylinder not to fire? (shamoo)

spark plug wires?
did you check the compression in the cylinders?
are you sure the injector is delivering fuel?
are the valves opening and closing?

do you know what cylinder is not firing?
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Old 11-30-2001, 06:25 AM   #3
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Default Re: What could cause a cylinder not to fire? (shamoo)

plug wires?
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Old 11-30-2001, 08:59 AM   #4
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Default Re: What could cause a cylinder not to fire? (Spade)

Quote:
plug wires?
My bad, I forgot to mention them. I replaced those too, no change. It's the 3rd cylinder.

Incidentally, here are my comp. test results:
1: 180
2: 180
3: 165
4: 200
I didn't perform a leakdown test, I don't have the tools required for it.

I pulled out the plug wire for the 3rd cylinder while idling, and there wasn't any change. The other wires yielded a pretty noticable change.

Any other ideas? Thanks.
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Old 11-30-2001, 09:04 AM   #5
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Default Re: What could cause a cylinder not to fire? (shamoo)

Sounds electrical, most likely the plug wire or coil. However, faulty coils do not selectively affect just one cylinder.
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Old 11-30-2001, 09:06 AM   #6
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Default Re: What could cause a cylinder not to fire? (shamoo)





Anyway, you guys should be honored that you know the owner of the fastest 3 cylinder turbo Integra out there!! Click the image to open in full size.

ill bet i would take you down........and when i pass you ill blow oil all over your car
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Old 11-30-2001, 09:31 AM   #7
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Default Re: What could cause a cylinder not to fire? (integRated109)

i'm stumped.....how nasty is the plug of #3? How does it compair to #4 and #1?
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Old 11-30-2001, 09:58 AM   #8
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Default Re: What could cause a cylinder not to fire? (shamoo)

Quote:
plug wires?
My bad, I forgot to mention them. I replaced those too, no change. It's the 3rd cylinder.

Incidentally, here are my comp. test results:
1: 180
2: 180
3: 165
4: 200
I didn't perform a leakdown test, I don't have the tools required for it.

I pulled out the plug wire for the 3rd cylinder while idling, and there wasn't any change. The other wires yielded a pretty noticable change.

Any other ideas? Thanks.
why is 3 down 9% on compression. when all the others at 180+


[Modified by Crazydave, 6:59 PM 11/30/2001]
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Old 11-30-2001, 10:02 AM   #9
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Default Re: What could cause a cylinder not to fire? (shamoo)

This happened to me just a couple months ago. I too, had everything you mentioned checked to no avail. The culprit ended up being a bunk wire on my interior wiring harness. My friends soldered it and everything was cool again...


[Modified by MugenHondaFormula1, 7:03 PM 11/30/2001]
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Old 11-30-2001, 10:06 AM   #10
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Default Re: What could cause a cylinder not to fire? (MugenHondaFormula1)

switch the number 1 and 3 injectors.. and see if clyinder 3 still doesn't fire
I don't think the compression on 3 should be that low though Click the image to open in full size.
Just trying to eliminate fuel/electrical problems
before we start looking for mechanical problems


[Modified by Crazydave, 7:15 PM 11/30/2001]
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Old 11-30-2001, 10:12 AM   #11
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Default Re: What could cause a cylinder not to fire? (Crazydave)

I once had an oldsmobile Achieva S and two of my pistons weren't firing. I switched out everything that you did and it still didn't fire. Than I found out that everything, and I mean everything on the inside of my ebgine was shot all to hell. But I don't want to put your hopes down.
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