I've got an 89 325ix. I recently noticed an issue with bucking or hesitation at certain points on the power band.
What makes this issue terribly confounding is that it doesn't always occur at the same RPM, depending on the gear I'm in, and throttle position doesn't seem to have anything to do with it. It occurs around 6k RPM in 1st gear, 5k in 2nd, 4k in 3rd, down to about 3.5k in 5th. The ignition system on this car is new-ish, as are many of the fuel system components. I've tried spraying contact cleaner on both ends of spark plug wires, and that seemed to make the problem better, but not gone.
I don't want to throw money at this issue, but I would like to solve it. Where do I go next? I was thinking of replacing the ignition coil, as that hasn't been replaced during the car's 216k-mile life. Is there something obvious I'm missing? Any help is much appreciated.
What makes this issue terribly confounding is that it doesn't always occur at the same RPM, depending on the gear I'm in, and throttle position doesn't seem to have anything to do with it. It occurs around 6k RPM in 1st gear, 5k in 2nd, 4k in 3rd, down to about 3.5k in 5th. The ignition system on this car is new-ish, as are many of the fuel system components. I've tried spraying contact cleaner on both ends of spark plug wires, and that seemed to make the problem better, but not gone.
I don't want to throw money at this issue, but I would like to solve it. Where do I go next? I was thinking of replacing the ignition coil, as that hasn't been replaced during the car's 216k-mile life. Is there something obvious I'm missing? Any help is much appreciated.
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