who wants to read some plugs?

[07-Civic-Si]

Started to get a miss fire last week. I changed my plugs today and this is what came out.



whats going on with the third one?

[ThatWhiteGuy]

u need to get rid of that POS columbia tune and get a real TUNE

[godzhand]

maybe spark plug wire on the cylinder with the black ass tip only time I see that is when the cylinder is getting fuel but fuel is not being ignited properly and the flame front is weak causing the plug too be caked with unburned fuel. +1 on a Better tuner also Get Wikkedv16 on this forum to do it hes very good man and cheap.

[07-Civic-Si]

u need to get rid of that POS columbia tune and get a real TUNE

[07-Civic-Si]

i do need a re tune but i need to get some real injectors first

[ThatWhiteGuy]

http://www.orlandoforums.com/forum/s...26#post1988326

[Stupid]

Are they all gapped the same? and yea ditch the Colombia tune, what ems are you running?

[Catdaddy]

checked cylinder compression?

[ThatWhiteGuy]

checked cylinder compression?

it was just rebuilt like 3-4 weeks ago

[07-Civic-Si]

Are they all gapped the same? and yea ditch the Colombia tune, what ems are you running?

yea all gaps are the same .030

[godzhand]

Carbon Fouled

Carbon fouled plug tipSoft, black, sooty, dry-looking deposits indicate a rich air fuel mixture, weak ignition or wrong heat range spark plug (too cold). These carbon-based deposits are conductive, much like oil fouling, and will allow the voltage coming out of the center electrode of the spark plug to track down the core nose rather than jumping the gap. This will result in an engine misfire and further aggravate the carbon fouled condition. Check for correct plug heat range. On fuel injected engines, check for sticking injectors, malfunctioning cold start valves and/or circuits. Also check for correct fuel pressure specifications. On computer controlled vehicles, the "limp home" computer mode will always result in a rich condition. Therefore, it is imperative that you check the operation and condition of the on-board computer system. On carbureted vehicles, check choke and choke pulloff, high float level, and needle and seat condition. On all engines, severe vacuum leaks can decrease manifold vacuum, resulting in a rich condition. Weak and/or damaged secondary ignition systems will fail to spark across the gap lowering combustion chamber temperatures and promoting carbon deposits. This condition could also result from continuous low speed driving or poor cylinder compression.

[godzhand]

since it is really only on the one cylinder I'm going with improper spark gap, bad spark plug wire, or sticking injector. Use a DMM on the spark plug wire and check it, Soak the injector in mineral oil put it back in and give it a few taps, and check the gap on the plugs.

[07-Civic-Si]

checked cylinder compression?

yea i just re ringed it for some freshing up mostly because i wanted a reason to take it apart but it brought the compression up from the 160s to the 170s

[Stupid]

Yea one is def rich but the others are pretty lean what ems are you running.

[godzhand]

what plugs are you running also heat range. N/a or boost?

[07-Civic-Si]

Yea one is def rich but the others are pretty lean what ems are you running.

crome

[07-Civic-Si]

what plugs are you running also. N/a or boost?

boost

r5672a-8

[godzhand]

how much psi

[07-Civic-Si]

14

[godzhand]

you should be running a smaller gap than .30