Spark plug OEM FORD or AC DELCO

Believe it or not I got the Genuine AC Delco iridiums from Home Depot for $3 a plug.

Problem solved: I got a internally bad ac delco spark plug. Gap and everything was correct no cracks I could see literally just a bad plug.

I changed my coils and spark plugs and it fixed this same issue

I had this 8 months ago in my FG

New spark plugs and coil packs fixed it.

Tengo exactamente el mismo pero en azul, lindo bicho pero en invierno a la mañana sufris, mas te vale tener la bateria cargada y las bujias nuevas, porque sino no arranca

I recommend nothing with platinum. I've had problems with those in my 1980 gbody with a 305. I just keep it simple with old ac/delcos now. Keep it simple for less problems.

The new plug is AC Delco 41-156. Cannot tell any difference in my Gen 2 after replacing plugs. It ran fine before and did afterwards as well.

Problem solved: I got a internally bad ac delco spark plug. Gap and everything was correct no cracks I could see literally just a bad plug.

I bought eight new AC/Delco from eBay. While gapping the plugs, I noticed that in two of them, the ceramic was not concentric with the body of the plug. It's difficult to measure, but it's easy to see by eye. I'd estimate the error is about 0.02 to 0.03 inches.

I had the same experience and ended up getting a code. Swapped them out back to AC Delco and never had an issue.