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Message: <blockquote data-quote="Terrorist 5.0" data-source="post: 1589321" data-attributes="member: 30689">Ok. So this points me in a bit of a different direction. Your PIP sensor is your crank sensor, which is what your tach displays. I had an issue very similar to yours and I solved it with a new PIP sensor. So if your tach is going haywire when your problem occurs, this is likely your PIP sensor acting up.Replacing it requires you to disassemble the distributor, but that’s very easy so don’t worry. I’m not saying 100% the PIP sensor is your issue, as I never concretely diagnosed the issue when I had it, rather just took an educated guess using my reasoning above, but I think it is your culprit here.I wouldn’t recommend replacing the coil. If your coil was bad you wouldn’t be getting weird tach readings.If you want, a new TFI module is cheap and easy to replace. Try that, and report back.</blockquote>