Guys i am getting the above code in my 04 Z06 the car is not running as it should it has a miss to it. Does this code means that the coil for cylinder # 3 is bad? I also checked with my test light with the car running and i didn't get any light, but checked other coil and got a light. Please some one confirm that i need a new coil so i can go get a new one for it in the morning.

 

Well,, heres the coil circuit. Your going to need a VOLT/OHM Meter to actually troubleshoot it correctly.



You can SWAP the coils to a different location and see if the DTCs change to a different coil location.

BC

 

Bill, thanks for the fast reply, i will try to do that tonight and will give you a feed back.

Thanks,

 

Bill, I swaped coils to another location and still getting the same code. Now what to do next?

 

Start checking the wiring between the PCM and the coil

 

That happened to me.The pin in the white plug where you can disconnect the coils.The female part of the plug got sloppy and was not making contact or the plug that goes right into the coil,Check that too.

 

All GM DELPHI Weather tight connectors are suspect to female pin spread. When the female pins spread apart, you get a poor intermittant connection. The door power plug connectors are BAD for that very issue..

Check the pins and make sure that they are good. You still need that VOLT OHM meter!! Measure voltage on coil pin D and ground on A.. Make sure that you getting the coil trigger signal. You may be able to see it on the AC Volt setting. I use an old dwell meter and it will read the trigger signal.

 

OK, thanks guys for the help was put into this and a special thanks to Bill for providing the Diagram that was allot of help.

I got the car fixed and running right, the problem was traced to the light blue wire which is the ignition control signal wire, the wire was stripped in one small location and was touching the frame, the location is where the main harness comes from the back side of the passenger side head then goes over the frame then under the battery tray.

On that location the frame has a sharp edge, the harness was rubbing on that sharp edge and that stripped the wire, so the wire was checked, taped up i put some good rupper insulation on that part of the harness to protect it more and all was good again.

 

You dont have a picture of the area where the harness was rubbed do you??

Bill

 

I don't at the moment, but i can take some and post them.

 

Haven't posted much over the last several years as my "day" job consumes so much of my time, but resurrected this five year old thread to pass thanks to Bill (again) for the body of knowledge he has posted over the years regarding the electrical system on the C5.

At a race at Summit Point on June 11th, my car started to miss coming out of turn 2 with about 4 laps to go. Felt similar to what the low fuel starvation feels like coming out of long right hand corners (and 1-2 at Summit is a long right hander), but it sounded different and I had plenty of fuel. No codes and no engine fault. It got worse as the race came to a close and started a happening at several different places on the track - all high rpm, high load in 3rd gear. All with no fault. I milked it to the end (and took overall and class wins). On the cool down lap, the car ran horribly. Sounded/felt like a lost cylinder to me but I really have no experience with that (thankfully). That evening we troubleshot what we could which was hard with no codes. Replaced plugs and verified fuel pressure good. Went out for qual on Sunday morning and could barely get around the track. Still no codes.

Brought it home, and finally when putting the car in the garage got the P0353 code.

No time last weekend to troubleshoot, but this weekend we took out the PCM and checked wire continuity to the ignition coil (and several others for comparison), all sat. Based on this thread, we took out the battery and verified all the wire harnesses on that side were good.

Based on other posts of Bills, took off the driver's side valve cover (mine is a tall Proform so couldn't see the harness behind it). After we got the valve cover and coils out of the way, the wire harness was completely exposed to the back of the valve cover/block and a light blue wire (assume that to be the #3 ignition coil control wire) was on the outside and looked chaffed, but no major damage. Taped up that wire, then put a wire loom around that section of wire harness - fixed! Well at least presumably. Ran it for about 15 minutes on jack stands and when it was warm, ran it up and down in rpm several times. This morning we got P0353 instantly. Just now, all good. Have to put new brakes on to give it a test drive, but next race isn't until Aug 19-20 so have time.

Thanks to 99MALLETT396 for sharing his find and fix though it turned out not to be the same as my fault, and to Bill for his response to this thread and the dozens of other ones I read today that pointed me to the wire harness behind the valve cover.