You can with a 1g CAS.

i know for 1g cas.But i am 2g and i dont have 1g cas.

You would have to swap a 1gcas in and most likely get ecmlink to invert the signal. Otherwise no, not on a 97+ model year. Its all ECU adjusted with the crank and cam angle sensors. You realy shouldnt be off. The 95-96 had the firewall ground for some way to check it but idk about that.

How far is it off?

Recheck it with this method:
To get the true timing is to unplug the injectors and have someone turn the car over while you watch the timing light/crank mark. Cranking over is the only time the ECU locks timing at 5deg on our years. While running its always adjusting and this could be why you think its off. Dont fry your starter though!

i use this method to check..http://www.dsmtuners.com/forums/art...-timing-without-using-lower-timing-cover.html
i got dsmlink v2.. its show me with this method its off not with much
yeah maybe its not off .. i am smelling gas from the exhaust when i am driving and the wideband its show me i am ok..thats why i am thinking its off
I dont know i am just trying to find out why its the gas smell..
because the car run ok..but i am smelling gas with not even boosting the car
i got new gaskets,no leaks .