I need help on my 2000 4runner 3.4, it runs good on the way to work, about 2 miles when I leave and the engine is cold but when it warms up it has a sputter and the engine light comes on,I took it to a parts dealer for the test code and it just showed a miss fire on #3 cylinder, it did this once before about 2 months ago and a tune up fixed it temp.

 

coil packs or spark plugs i have the same problem just i did a 3.4 swap. im changing all my coil packs just because i want too but just change thatone if u want to stay cheaper.

 

Idid that and still had the miss so I took it back