how to time a 1990 chevy tbi 350?

[BLZNBIG]

the truck runs alright. but  me and my brother think that something is wrong with the timming. i was wondering if there is a certan way you have to time the motors in a 90 chevy tbi motor. if you hook the timming light up to it it dosnt stay right on 0 but it goes inbetween 0 and 4. on the timming tab. when you drive it it is doggy. and has no power.. new everything.. just rebult the motor. anyone got any help? thanks

[Bo Duke]

first off, there's a wire on the fire wall that u need to disconect. its the advance, so that way when u set it to zero its actually at zero, then when u plug it back in it should read about 12 degrees if im correct or maybe 14...... Try setting it to 12 or 14 and running it then.....

[BLZNBIG]

do you know what color the wire is?

[betterbeaters]

I think its brown

[RIP_K52007]

i belive its brown with a white strip either on firewall or under dashboard on passenger side. Gotta have that unpluged n set it at 0 for stock timing, go from there if you want to advance it. When computer takes over it bumps it up roughly 10 degrees.

[BLZNBIG]

thanks everyone for the help i also looked in the chiltons book and found where it was at..