Ultraviolet
TYF Newbie
- Joined
- Mar 25, 2024
- Posts
- 16
- Reaction score
- 25
I’m new to the forum. I’ve owned my 2011 suburban LTZ for about a year and just paid it off! It has 130k miles. I had an issue where the stabilitrack cut out and it was running rough. I took it to my mechanic and they replaced one coil pack on cylinder 1 after the first visit since it was throwing a misfire code. Then it happened again and they changed the plugs and wires. The main issue was gone but there was still a slight stumble in drive at idle. This is something it’s done since I bought it. I added the airraid kit and got a tune from black bear (on referral from this forum - thanks!) and things seemed better for a bit. Now it’s back to stumbling at idle but no codes are being thrown. Basically when I’m at a stoplight it’ll be fine for a few seconds and when the idle drops a bit it’ll stumble as if there’s a misfire. I’m going to check that all the plugs are installed correctly ie screwed in all the way and I’ll check that the wires are fully seated. It seems to be lacking power when accelerating. I also head an intermittent ticking sound. It sounded like when a gas stove fails to light - tick tick tick tick. It didn’t sound mechanical. I’m thinking that if all the plugs check out I’ll replace the coil packs since only one was replaced by the mechanic. If that doesn’t fix it I’ll replace the plugs and wires with ac delco (I’m not sure what the mechanic put in). I’ve looked through the forum for similar problems and the fix seems to be plugs, wires and coil packs. If anybody else has any other ideas I’d love to hear them! Thanks for the great forum and helpful responses!!