hi i have 04 tacoma when i got it i changed the wiring harness it started ran fine then it sat for 8 year in my garage then when i got to it changed gas and it turned over but no spark any ideas

 

Well I'd gather it's somewhere in the ignition system then and you need to check it...

 

Any codes? Power to the coil(s)?

 

8 yrs continuous? That's a dead battery my friend. Dont even know if it can be jumped. What did you mean by changed gas and no spark? Dashboard lights come on when you turn on ignition? Still clicks? Need more detail. If the battery works still, I doubt it can recharge like before. Other possibilities could be fuel related. Sitting long means a tune up on your return.

Give us more story, unless you got it up and running again by now.