- Sep 1, 2016
- 19
- 0
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Recently my 1996 mustang gt has been hesitant under throttle (feels slow). If i give it throttle it sputters along and makes a humming sound especially when i go up a hill. What could this be? i read it could be the spark but i have new spark plugs and wires in the car. The coil pack been on the car ever since i got it. On start up my car idles very high around 1500 rpm and stays there until the car is warmed up or i put it in gear once it gets a nice idle going it jumps from 5500 rpm to 750 rpms at idle. i checked for vacuum leaks and found none not sure what else to check for. Could this be a bad coil pack? Any info would help