i have an ls/vtec swapped into my del sol, i boosted it got it tuned, and it ran great then air fuels started going crazy a couple weeks after the tune, so i started with vac lines and there all good so i checked the timing and its half a tooth off would cause the car to run way lean at partial throttle and and idle and also and when in boost it runs 10 flat so its to rich

 

Retune. Take it back to the tuner.

 

I got 2 revisions and nothing changed

 

2 what? Did you actually take it to a tuner or are you talking about a basemap?

 

i sent him datalogs of the car and he changed the tune according to that, plus the tune cant change. im leaning towards my t belt cuz when i set the car at tdc its half a tooth off

 

Could have fixed it by now if that were the case.

 

take it to the tuner, even if u pay for dyno time again. Better save than sorry