Subject is wrong stating a 2012 Tacoma. It's a 2010...
Bought my 2010 Tacoma Doublecab in early 2010. Later in that year I started noticing a miss causing a slight to medium jerk when at idle.
While sitting at a light it will happen probably 10 times and can range from a slightly noticable miss to a bit of a jerk that is a lot more noticable. I have had a few people in the truck that noticed it as well and gave me a odd look so I know I'm not crazy. I've never had a vehicle do this. This occurs in hot or cold weather and seems possibly happen more once the truck has warmed up a bit. Having the A/C on or off has no effect and the miss is more noticable than the A/C clutch kicking in anyway.
Despite trips to the dealer this has accomplished nothing but to document it with them telling me it is normal. Wha?! Frustrating.
There is no code thrown, the intake is fine, pull the plugs and they look fine (truck has 10k miles on it).
I am starting to wonder if there is a coil with an issue.
I have never had any kind of significant issue with the numerous Toyotas I have owned and this one is ticking me off due to the lack of support from the dealer.
Any way to test the coils with an intermittant issue? There around $70 a piece and moving one around while possible might take a while.