phils89sc
Registered User
When I put my Autolite 5144 plugs in when I did my head gaskets, I gapped them to .040. I had planned on running more boost, but decided not to until i rebuild my engine.
So, my question is, since they are gapped smaller than stock, can that affect cold starts or idle quality? I think the factory gap is like .052 or .054. I know everyone says vacuum leaks cause idle issues, and I agree, however, I have used a smoke machine on my entire intake tract and could find none.
I think I am going to change the plugs again and go back with the Autolite Double Platinums and gap them back up to .054. Currently, I only make 10 pounds of boost, probably due to the ported exhaust manifolds, free flowing true dual exhaust and factory pulley on the SC. At idle, I have about 18 inches of vacuum.
Thoughts? Experiences?
So, my question is, since they are gapped smaller than stock, can that affect cold starts or idle quality? I think the factory gap is like .052 or .054. I know everyone says vacuum leaks cause idle issues, and I agree, however, I have used a smoke machine on my entire intake tract and could find none.
I think I am going to change the plugs again and go back with the Autolite Double Platinums and gap them back up to .054. Currently, I only make 10 pounds of boost, probably due to the ported exhaust manifolds, free flowing true dual exhaust and factory pulley on the SC. At idle, I have about 18 inches of vacuum.
Thoughts? Experiences?