Changed my plugs tonight and once I got her back out on the road she was breaking up pretty bad. No CEL's yet but starts to break up around 1500 RPM.

Pulled all of the plugs again and didn't see anything strange. Also double, double checked that every hose was connected and that there wasn't a pulled lead or anything.

Guessing a bad coil, any thoughts?

 

No, if it ran fine before you changed your plugs then it is absolutely something you did. Wrong plugs? Not connected properly? Or you have left something unhooked or broken, an electrical vacuum line or component?

Keith

 

Did you get all the wires hooked up to the correct plugs? I've done that before on my 4cyl a few years back. It ran like junk and I couldn't figure out what was wrong. After about an hour of searching, I finally found out I had the wires mixed up.

 

Same exact plugs that were in it so it not wrong plugs. Really thought it was a vacuum line but couldn't find anything unhooked or broken that I could see last night. Going to look again today and see if my Xcal can pull a code. Did the plugs one at a time so the wires are all connected correctly.

 

right gap?..possibly bad plug?

 

did you use copper or platinum plugs I know My car absolutely hates platinum plugs and so does my friends 03 GT. If we put those in they skip spit and sputter until we put copper plugs back in

 

Interesting, did use platinum plugs. The only thing is I used the same plugs that were in it from the factory. Did you only have issues after you changed your plugs the first time?

 

Got a code from my Xcal:

P0357 Ignition Coil G Primary/Secondary Circuit Malfunction

Does that mean the actual coil is bad or that there's an issue with the plug?

 

Good question. It is strange that this only happened after you changed out the plugs. It is possible you got a bad plug, but I don't know why that would set off the code it did for a bad coil. Strange indeed.

 

maybe he had a coil go bad after actually getting hooked onto a good plug????

 

Found it!

One of the new plugs is bad. Tried replacing the coil on the one that gave the error and that didn't help. Pulled the plug and put a new one in with the old coil and everything is fine now.

Thanks for the help.

 

Every time I put platinum or iridium plugs in my car it skips spits and sputters .
I've tried Bosh, Motocraft, Denso, Autolite, NGK and I even tried AC Delco but it only runs right with copper plugs so I just use plain copper NGK plugs

 

So far so good with these plugs but that is something I'm going to keep in the back of my mind if anything funky starts happening.

 

i love being right! lol

 

Not as much as I love being able to drive my car again.