Tachometer fluctuations

Hello,

Have you installed new spark plugs and wires lately? If not I would start there. Here is a guide to help you get the problem fixed.

https://www.2carpros.com/articles/how-to-change-spark-plugs

Please let us know what happens.

Best, Ken

I took it to a shop, they replaced the spark plugs, wires and dist. Cap.. Do you think they installed it incorrectly???

Did you have the problem before they did the work? If not they could have cracked one of the spark plugs

Please let us know what happens.

Best, Ken

Here is the full story. Bought it a year ago. Not even a month later it just died randomly no codes no warning signs. Toyota dealership replaced the coolant temperature sensor. Here is where it gets fuzzy. I believe this is where it started this flickering issue, though not as bad, it would still drive. When the problem showed itself it would be very quickly then back to normal. Took it to a shop, they replaced the spark plugs, plug wires, distributor cap, replaced the fuel filter and flushed the fuel lines. The problem is seemingly worse, less dependable almost everytime I get it to stall. I also have a video of the whole incident that I could show. Maybe attach through the email?

okay, it sounds like the ignition coil is shorting out. This is were i would start.