hey got a h/c car complete tune and everything and lately the cars been spitting and sputtering a bit so i hooked her up to the obdII and it says missfire on cylinder 5....what could be the problem?? the only thing i could think of is # 5 coil pack went bad but im not sure could anyone gimnme some feedback please
I hope it's the coil pack. The fact that it's been tuned could present some problems. One could be a lean condition which could burn a hole in the piston. This has happened to some w/ improper tunes. Good luck Did you check the wire 1st.
First thing, disconnect the plug wire and confirm spark. If you have spark then take out the plug and look at it. If it's missing it will more than likely be oil fouled.
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Ditto, mine started intermittent missing-worried big time-checked all the plug wires and 3rd from front on left side had worked its way loose but not off the spark plug-- pushed it firmly back on and car has run fine for last 3 years!
Also I forgot to mention have you checked the actual spark plug itself. Not just for fouling, I had a cracked plug, probably from the install, which was my problem some years ago. It was slight and drove me crazy till we changed out the plug and saw the crack.
Mine wound up to be a cracked spark plug itself. Try ramping up your car HARD and fast to 6000 rpms, does it sputter around 4000-4500 rpms as if you hit the rev limiter? That might be a sign of a crack in spark plug arc-ing under high load demand.
$10.00-$15.00 fix. Start there with a new spark plug, if that dont work, then change the wire itself. Then if THAT dont work, maybe it is the coil pack....
Let us know!
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2KC5 FRC MN6, Bad Head & Cam install, Failed Lifter, Burnt Clutch, Cracked Rotors, Bad Tune, Blown Piston, Blown Head Gasket, and faulty rockers.....but I still come back for more.....Installed/Tuned by LG Motorsports. Best 1/4 Trap: 11.94 Best Top Speed 121.10 on street tires at 1200 Ft ASL.[/center]
Last edited by GR8 WHITE : 01-15-2008 at 09:01 PM.
hey evryone thanks for the help took some advise and checked the wires lol it was cylinder 5's wire was melted on the header changed it out and runs fine thanks a lot
Glad you got it! Now that you know the wire was melted, try wrapping them up in some cool sox or put some heat shield around the wire area that is predominant to touch the header pipes. I get that too. So I wrapped mine with heat shield.
How often do you miss shifts? Go for fourth and grab second? Tell the truth. That motor might have just seen 9 grand and now you have some bent pushrods/valves... Knew a guy with a transam that had misfire issues attributed to over revving his. Just a thought.
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