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Ignition timing 1994 Chev. 5.7L

This is a discussion on Ignition timing 1994 Chev. 5.7L within the Technical / Maintenance forums, part of the General Discussion category; How do you set the timing on a 1994 1500,5.7L?...

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    Ignition timing 1994 Chev. 5.7L


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    How do you set the timing on a 1994 1500,5.7L?

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    Re: Ignition timing 1994 Chev. 5.7L

    Bring the #1 cylinder to TDC and chalk the harmonic balancer where the metal tang is showing the degrees you want. Hook up a timing light to spark plug wire of the #1 cylinder and start the motor. If the timing is off (you'll see with the timing light flashed) rotate distributor cap clockwise or counter clockwise untill the timing flash is flashing on your chalk mark.

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    Re: Ignition timing 1994 Chev. 5.7L

    you will need to disconnect the wire under the dash to set the timing, it is a tan/black wire, disconnect the inline connector near the blower motor

    this is through the glove box with the insert removed

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    Talking Re: Ignition timing 1994 Chev. 5.7L

    Quote Originally Posted by dave89iroc
    you will need to disconnect the wire under the dash to set the timing, it is a tan/black wire, disconnect the inline connector near the blower motor

    this is through the glove box with the insert removed

    Good point! Forgot about this. Glad to see someone else is always helping. Good man dave89iroc!

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    Re: Ignition timing 1994 Chev. 5.7L

    that is on the 95s, 87-94 should be on the fire wall in the engine compartment, and use white out to color in the one single line on the harmonic balancer, then set timing as normal with the gun, these motors like about 6* advance, then plug the wire back together, if you forget to, a check engine will go off.
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    Re: Ignition timing 1994 Chev. 5.7L

    Quote Originally Posted by vic_V8
    that is on the 95s, 87-94 should be on the fire wall in the engine compartment, and use white out to color in the one single line on the harmonic balancer, then set timing as normal with the gun, these motors like about 6* advance, then plug the wire back together, if you forget to, a check engine will go off.
    they moved it to the glove box in 94 see above pic.
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    Re: Ignition timing 1994 Chev. 5.7L

    Quote Originally Posted by NEUMANNZZ
    they moved it to the glove box in 94 see above pic.
    yup, that pic is my 94
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    Re: Ignition timing 1994 Chev. 5.7L

    Quote Originally Posted by dave89iroc
    yup, that pic is my 94
    thats odd, I have a '94 in my shop right now with it in the engine bay
    Selling a front Chevy Dana 60, 5.38s welded, $1000 never run, PM for more
    1992 K2500 6.5 Turbo Diesel/4L80e/4.10s (sas with Dana 60 just sitting around waiting for a rainy day)
    '84 K10, 6" Tuff Country, now 1 ton frame swap and Cummins swap have begun
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    The Flying Dutchman neevnav's Avatar
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    Re: Ignition timing 1994 Chev. 5.7L

    My 94 is in the glove box too.


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    Re: Ignition timing 1994 Chev. 5.7L

    Quote Originally Posted by vic_V8
    that is on the 95s, 87-94 should be on the fire wall in the engine compartment, and use white out to color in the one single line on the harmonic balancer, then set timing as normal with the gun, these motors like about 6* advance, then plug the wire back together, if you forget to, a check engine will go off.

    Is this true? Ive always heard set it to 0*

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    Re: Ignition timing 1994 Chev. 5.7L

    factory timing is zero degrees with est wire disconnected.
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    Black And Orange Beast $cotty's Avatar
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    Re: Ignition timing 1994 Chev. 5.7L

    sry idk how old this post is i found it on Google but i have a 1990 and i tried to set it to zero but the engine shook violently and almost stalled would that be because of a bad fuel pump ?

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    Re: Ignition timing 1994 Chev. 5.7L

    Quote Originally Posted by $cotty View Post
    sry idk how old this post is i found it on Google but i have a 1990 and i tried to set it to zero but the engine shook violently and almost stalled would that be because of a bad fuel pump ?
    could be. or worn out valve train.
    O2 GMC RCSB 4.8L V8 AUTO 3.73's
    rebuilt/beefed up 4L60E(at 43,000miles)
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    Re: Ignition timing 1994 Chev. 5.7L

    Did you disconnect the tan/black wire first? If you didn't, and tried to set to zero, you're actually setting it WAY retarded past zero - anywhere from roughly 12 to 20 degrees.

    And on the subject of "where the tan/black wire is" - there's no 100% absolute answer to this, but on 88-93 it's USUALLY on the engine compartment side of the firewall, passenger side, near the black plastic electrical convenience center cover. On 94-95 it's USUALLY either behind the glovebox insert or under it, often hidden taped up in the harness bundle. Tends to be a smaller inline disconnect on 94-95 so it's harder to see. Have worked on way too many of these for this to be a debatable subject.

    Richard

 

 

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