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Projects & Parts => Garage/Tech => Topic started by: BLZNBIG on October 20, 2008, 05:39:01 PM

Title: how to time a 1990 chevy tbi 350?
Post by: BLZNBIG on October 20, 2008, 05:39:01 PM
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
Title: Re: how to time a 1990 chevy tbi 350?
Post by: Bo Duke on October 20, 2008, 05:42:25 PM
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.....
Title: Re: how to time a 1990 chevy tbi 350?
Post by: BLZNBIG on October 20, 2008, 06:46:16 PM
do you know what color the wire is????
Title: Re: how to time a 1990 chevy tbi 350?
Post by: betterbeaters on October 20, 2008, 06:51:44 PM
I think its brown
Title: Re: how to time a 1990 chevy tbi 350?
Post by: RIP_K52007 on October 20, 2008, 07:22:23 PM
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.
Title: Re: how to time a 1990 chevy tbi 350?
Post by: BLZNBIG on October 20, 2008, 08:01:09 PM
thanks everyone for the help i also looked in the chiltons book and found where it was at..