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'94 tbi 350 timing adjust

This is a discussion on '94 tbi 350 timing adjust within the Technical / Maintenance forums, part of the General Discussion category; i had varying answers to this question... Can i treat the "distributor" on this motor like any other distributor...I.E. advance/retard ...

  1. #1
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    '94 tbi 350 timing adjust


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    i had varying answers to this question...

    Can i treat the "distributor" on this motor like any other distributor...I.E. advance/retard timing at will....or does it have to be at 0degs TDC at all times.

    some say yes, some say it wont run. anyone want to clear this up?

    '94 tbi 350
    '87 Buick Turbo T.

    '94 Chevy Blazer sport 1500

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    Re: '94 tbi 350 timing adjust

    nobody?
    '87 Buick Turbo T.

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    shake & bake 91_bowtie's Avatar
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    Re: '94 tbi 350 timing adjust

    Whoever told you that it won't run if you adjust it is
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    Re: '94 tbi 350 timing adjust

    you can turn it if you want..... but it runs best at 0 degrees.
    1991 K5 Blazer w/ 38" SSR's
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    Re: '94 tbi 350 timing adjust

    Quote Originally Posted by K5Chris
    you can turn it if you want..... but it runs best at 0 degrees.
    well everyone on here told me to advance my timing 6 degrees to make mine run better off the line so if not turning the distibutor how do you adjust it?

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    Re: '94 tbi 350 timing adjust

    Quote Originally Posted by 1992silverado
    well everyone on here told me to advance my timing 6 degrees to make mine run better off the line so if not turning the distibutor how do you adjust it?
    i said turn the distributor if you want to...
    1991 K5 Blazer w/ 38" SSR's
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    Re: '94 tbi 350 timing adjust

    Quote Originally Posted by 1992silverado
    well everyone on here told me to advance my timing 6 degrees to make mine run better off the line so if not turning the distibutor how do you adjust it?
    where they talking about advancing the timing 6 degrees with the computer advance disconnected?

    because when u set base timing u do it with the computer advance disconnected and when u hook it back up it will be different?

    my 93 had a wire that was kinda of a light brown color and i wanna say with a black line on it,
    is under the black cover on the passager side firewall

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    Re: '94 tbi 350 timing adjust

    I run my 95 (which is the same motor) at 4*. It seems that's where it likes to run the best. But like joakwin said you will have to disconnect the timing wire to set it.

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    Re: '94 tbi 350 timing adjust

    tbi motors run best with 4-6 degrees advanced.

    as stated, disconnect the wire, and set the timing, easy as pie.
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    Re: '94 tbi 350 timing adjust

    so this brown or brown with black stripe wire is behind the relay panel like where the fuel pump relay is?

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    Re: '94 tbi 350 timing adjust

    Quote Originally Posted by 1992silverado
    so this brown or brown with black stripe wire is behind the relay panel like where the fuel pump relay is?
    It's right on the firewall under the plastic cover next to where your A/C lines go in. It's a brown and has a white plastic connector on it. It's the only wire in there that looks like it could be disconnected easily. Don't try to set the timing without disconnecting it first. My '88 ran best with 8 degrees, but that was with an LT1 cam. At 0 degrees, the thing was a huge turd! Once I started to bump the timing up, it really came to life.
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    Re: '94 tbi 350 timing adjust

    My 94's wire is under the dash on the passenger side, just underneath where the glovebox is. Again, brown with a white strip I believe. Pat

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    Re: '94 tbi 350 timing adjust

    My 94 w/ 350cid is about 7* advanced. This is where it runs best. I noticed the more mods that I did, the greater it would hesitate of the line and fall on its face. To correct this I would advance the timing 1-2 degrees till the hesitation was gone, (as long as I didnt here any knocking). This really gave me great response of the line and at the track. Hope this helps.
    94 C1500 Extended cab, 350 TBI, whipple, gibson headers, edelbrock cat back, MSD ignition, electric fans.

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    Re: '94 tbi 350 timing adjust

    The 305 in my pops truck is running close to 10 degrees advanced. When we set it at 0 it fell on its face and couldn't get out of its own way. It's running an E-brock cam, intake and headers. Moved it by ear till she ran good and rechecked it. Right around 10 degrees is where she likes it!
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    Re: '94 tbi 350 timing adjust

    thanks for the replies. Thats what i figured too, maybe the guys who told me its not possible thought it was a later model DIS ignition.
    '87 Buick Turbo T.

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    Re: '94 tbi 350 timing adjust

    i have the 1994 4.3 TBI. if you start the engine, loosen the distributor clamp then twist the distributor to the left or right. whichever makes it run smoother. find the perfect balance and your truck will run amazing. my truck used to shudder violently when it was turned off but after the timing was advanced it turned off smoothly. 2 years of thinking it was normal. when the timing was retarded, it sounded sweet with some great back fire but absolutely no power from 600-3000 RPM

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    Re: '94 tbi 350 timing adjust


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    Re: '94 tbi 350 timing adjust



    Op hasn't posted since 2008 and it was a solid 6 year thread brought up by another newb from the dead.

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    Re: '94 tbi 350 timing adjust

    Quote Originally Posted by Badass69 View Post


    Op hasn't posted since 2008 and it was a solid 6 year thread brought up by another newb from the dead.
    Bunch of that crap going on here today. Maybe we'll get another turbo expert soon....

 

 

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