missfire on cylinder 6

**lsmaxxed** · 06-16-2011, 02:02 PM

just scanned my car after running very rough says cylinder 6 missfire, which plug is number six, and why could it be doing this?

**oharam** · 06-16-2011, 02:08 PM

Plug 6 is on the passenger side, 3rd one back from front of engine. Could be a bad plug, bad wire, bad coil.

**lsmaxxed** · 06-16-2011, 02:32 PM

checked the plug its clean and the wire looks good to.

**2001NBMZ28** · 06-16-2011, 02:38 PM

Swap the plug/wire with #4 and see if it moves.

**lsmaxxed** · 06-16-2011, 03:00 PM

i didnt swap the plug/ wire but i did have the spark plug unscrewed from cylinder head while plugged into spark plug boot grounded it to the header to check for spark and it had plenty of spark.

**2001NBMZ28** · 06-16-2011, 03:09 PM

A bad plug/wire can still spark, while you have the scanner swap it. Did you inspect it carefully for the porcelin not being cracked and for the correct gap?

**lsmaxxed** · 06-16-2011, 03:11 PM

they r e3 non adjustable i put em in when i put on headers, ill try swapping them, i also thought about swapping injectors and coil pack with another cylinder

**JayTA98** · 06-16-2011, 03:13 PM

I have to agree with 2001NBM a plug that sparks doesn't mean is good. Swap the plug with another one and plug everything back. See if the code goes to the swaped plug. If it doesn't then swap a wire. If the code still stays then swap a coil. Lastly try the injectors. At the point that the code goes to the new location the last item you swap is bad.

**lsmaxxed** · 06-16-2011, 03:46 PM

just swapped wire and plug with cylinder 2 ses light came back still says p0306 cylinder number 6 missfire detected

**JayTA98** · 06-16-2011, 03:59 PM

Originally Posted by lsmaxxed

just swapped wire and plug with cylinder 2 ses light came back still says p0306 cylinder number 6 missfire detected

ok that means the plug and wire are good. Try the coil now. you are reseting the light after each swap right?

**lsmaxxed** · 06-16-2011, 04:52 PM

yes resetting after every swap. just switched coil packs with number 2 same number 6 misfire code... what the car does is stutter and jolt and miss but i dont hear any nocking or anything, thats why i am stumped right now. also shot this video
[ame]http://www.youtube.com/watch?v=Ff-P8zEA3Zk[/ame]

**JayTA98** · 06-16-2011, 05:11 PM

oh i remember this video. so you are not getting the other codes anymore? If you swap the coils, wires and plug and the code is still the same then I will try swapping the injector. does the electrical harness that feed the passenger side coils look good? check the pins inside the coil plug and the main harness plug.

What did you do that got rid of PO102?

**lsmaxxed** · 06-16-2011, 06:00 PM

I got the p0102 from taking my car to autozone for a free scan. Today i bought my own obd2 reader and the only code it has shown is the misfire number 6 it hasnt read any other code. Im not sure how it isnt reading that code i havent done anything to it to fix the p0102 that i thought worked but it is still misfiring heavily and i just dont want to drive it anymore. Im pretty sure it cant be internal because theres no knocking

**JayTA98** · 06-16-2011, 07:28 PM

Originally Posted by lsmaxxed

I got the p0102 from taking my car to autozone for a free scan. Today i bought my own obd2 reader and the only code it has shown is the misfire number 6 it hasnt read any other code. Im not sure how it isnt reading that code i havent done anything to it to fix the p0102 that i thought worked but it is still misfiring heavily and i just dont want to drive it anymore. Im pretty sure it cant be internal because theres no knocking

Its interesting that the other scanner didnt match yours.

**JayTA98** · 06-16-2011, 07:29 PM

Originally Posted by JayTA98

Its interesting that the other scanner didnt match yours.

Give the injector swap a try and inspect the wires. let us know how it goes.

**lsmaxxed** · 06-19-2011, 10:13 AM

just switched cylinder 6 fuel injector with cylinder 4 drove it again. scanned the ses with my obd2 reader. STILL SAYS CYLINDER 6 MISSFIRE!!!

**lsmaxxed** · 06-19-2011, 01:58 PM

does ANYBODY have any suggestions????????

**jsmith564`** · 06-19-2011, 04:57 PM

sounds like you have an exhaust leak...

**lsmaxxed** · 06-20-2011, 02:12 PM

hmm, where could there be an exhaust leak at, and how would that cause a missfire on 6? i will check the exhaust for leaks i will start at the a.i.r. block off plates.