Sooooo as some of you might know, I got into another gtp a few weeks ago witha few mods already done, one of which is a comp vs cam.
To make a long story short it's always had an idle on the ruff side, but I was thinking it was due to the cam. But after listening to some idle on YouTube I started thinking that isn't the case and I have an issue. My symptoms are a ruff idle and a rich smelling exhaust.
This weekend I changed the plugs and wires in hopes to help, which it didn't do lol. Today, after I was installing my new matching radio and amp, I decided to unplug the maf like bill suggests to see if it smooths out, which it did. So now I know I have an issue somewhere. I pulled out my new to me scan tool and see what I can figure out. First I am getting the p0300 code for random misfires. I checked the parameters and noticed a few things, first of which is at idle, in park, I am seeing -15inhg (increases to 17-18 with maf unplugged). I also noticed I get a lot of misfires at idle, all of which go away as soon as I take off, most of them seem to occcur on cylinders 2 and 4. Anyways, sprayed carb cleaner on the lim and got the idle to jump a little when I sprayed around cylinder number 4, but it wasn't very noticeable.
Should I replace both the lim and maf? The fact that it smoothed out with the maf unplugged makes me think it's bad, but maybe it's just the lim. Also what inhg should I see at Idle?
To make a long story short it's always had an idle on the ruff side, but I was thinking it was due to the cam. But after listening to some idle on YouTube I started thinking that isn't the case and I have an issue. My symptoms are a ruff idle and a rich smelling exhaust.
This weekend I changed the plugs and wires in hopes to help, which it didn't do lol. Today, after I was installing my new matching radio and amp, I decided to unplug the maf like bill suggests to see if it smooths out, which it did. So now I know I have an issue somewhere. I pulled out my new to me scan tool and see what I can figure out. First I am getting the p0300 code for random misfires. I checked the parameters and noticed a few things, first of which is at idle, in park, I am seeing -15inhg (increases to 17-18 with maf unplugged). I also noticed I get a lot of misfires at idle, all of which go away as soon as I take off, most of them seem to occcur on cylinders 2 and 4. Anyways, sprayed carb cleaner on the lim and got the idle to jump a little when I sprayed around cylinder number 4, but it wasn't very noticeable.
Should I replace both the lim and maf? The fact that it smoothed out with the maf unplugged makes me think it's bad, but maybe it's just the lim. Also what inhg should I see at Idle?
