2004 GT Sluggishness - Success!
Just had to post this because I'm so happy with the results right now.
I've only had the car two weeks and this is my first mustang so I didn't really have a base line to compare it to, but I felt that the car was somewhat "sluggish" and in general didn't run like I thought a "GT" should. Searching online brought mainly suggestions like change the plugs, air filter, fuel filter, make sure fuel pressure is good, possibly change the COPs. So I did all of that minus the coils as they are somewhat expensive from even Autozone. Very marginal improvement but still no go. Then somebody told me to clean the MAF.
$8 bottle of cleaner and holy **** it's like a brand new car! Acceleration is vastly improved and much quieter and smoother, no more vibration in the shifter at idle, and I can let out the clutch and start rolling without giving it any throttle and it doesn't try to stall.
I did find a good deal on a set of MSD COPs on Amazon so I ordered them just because the ones in the car now appear to be original and have 147k on them, and the MSDs are red so they will look good under the hood.
I also have a catback coming in the next week but I was almost hesitant to put it on before because I didn't want to have a car that was all bark and couldn't back it up lol.
I also cleaned the MAF on my 05 Tahoe and while it didn't have as pronounced an effect as the 'stang it was noticeable. Now I can't wait to see what happens when I do my '09 Ram with 183k on it tomorrow.