Hey guys, just a quick question:
Just 2 weeks ago, I ordered a custom tuned SCT chip from American Muscle for my Mustang. I had three tunes that came along with the chip. I run the car on a 93 octane "race" tune. The car has a CAI, Magnapacks, and and a Magnaflow offroad x-pipe.
Just yesterday, I was driving the car and went to get on the highway. I stepped on it, and brought it up to redline in first, then went into second. However, once in second, the engine spit and sputtered and bogged down. I tried again, and same thing. No matter what gear I'm in, once I reach about 4000 RPM, the motor starts to sputter and it loses it's grunt. Once I shift and the RPMs fall, it's fine. No lights, no knocking, nothing. It idles fine, fires right up, and is fine until the RPMs hit 4 grand.
Now my question is, could the 93 tune be fouling the plugs? I replaced the plugs(Autolite coppers) and fuel filter last year when I bought the car and before I did any mods. I plan on throwing in some platinum plugs tomorrow, and see if that clears it up.
Thoughts?
Just 2 weeks ago, I ordered a custom tuned SCT chip from American Muscle for my Mustang. I had three tunes that came along with the chip. I run the car on a 93 octane "race" tune. The car has a CAI, Magnapacks, and and a Magnaflow offroad x-pipe.
Just yesterday, I was driving the car and went to get on the highway. I stepped on it, and brought it up to redline in first, then went into second. However, once in second, the engine spit and sputtered and bogged down. I tried again, and same thing. No matter what gear I'm in, once I reach about 4000 RPM, the motor starts to sputter and it loses it's grunt. Once I shift and the RPMs fall, it's fine. No lights, no knocking, nothing. It idles fine, fires right up, and is fine until the RPMs hit 4 grand.
Now my question is, could the 93 tune be fouling the plugs? I replaced the plugs(Autolite coppers) and fuel filter last year when I bought the car and before I did any mods. I plan on throwing in some platinum plugs tomorrow, and see if that clears it up.
Thoughts?