Trouble Code Help

[eric1514]

So on my way to the movies I heard a bang then nothing and then a lot of bangs like a misfire. I was entering the freeway so I was on the throttle. I backed off and limped to the shoulder. I kept limping, the misfiring stopped, and I nursed it home without a lot of drama.

I have a simple code reader and got this:
P2305 ignition coil b, secondary circuit
P2308 ignition coil c, secondary circuit
P2314 ignition coil e, secondary circuit
P2317 ignition coil f, secondary circuit
P0302 cylinder 2 misfire
P2305 ...... (same as above)
P2308 ......
P2314 ......
P2317 ......

It counted 9 codes although 4 are repeats

The car was running fine in the driveway, so I erased the codes, pulled out onto the street and gunned it. I Immediately got 3 codes, P2305, P0302, and P2305 again.

I presume the coils are listed a,b,c,d,e, and f, so ignition coil b is cylinder #2. I can understand 1 coil or spark plug going bad but 4 has me worried.

Any ideas?

 

[eric1514]

I took the coil out of #2 and swapped it with #1. Here's a pic of the two coils.

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#2 is the discolored one. One cylinder was not firing. With the engine running, when I pulled the coil wire from #1, the cylinder with the ugly coil, it ran the same. If I pulled the wire on #2, the engine stuttered even worse. I put the coils back. ran the test again and the problem followed the coil.

Took it one step further and removed the plugs from those two cylinders. They both look like this.

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There's no center electrode! These are NGK ZF R6F GP plugs. The gap is .085".

I think I'll throw some new plugs in it tomorrow and see what happens. The coil might be OK if the plug and the gap are OK.

 

[eric1514]

Changed all 6 plugs and new coils. Problem solved, so far. No codes and running smooth.