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post #1 of (permalink) Old 02-12-2001, 07:30 PM
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How to set timing on a tbi motor?

I have a 92 chevy with a 350 in it. I need to know how to set the timing on this thing since it has the computer controlled advance. Any help is greatly appreciated.


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post #2 of (permalink) Old 02-12-2001, 08:19 PM
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Re: How to set timing on a tbi motor?

Usaully the underhood engine decal will show how to time the engine. Now having said that, I know that a 9 year truck might not have the engine decal. Here is what I can say, use a jumper wire between pins "A"(ground) and "B"(test) of the ALDL connector. Then set the timing to 6 degrees BTDC. Remove jumper.

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post #3 of (permalink) Old 02-12-2001, 09:01 PM
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Re: How to set timing on a tbi motor?

In the wireing loom near the dist. thier is a single brown wire with a connector hanging out of the loom just disconnect it and start the motor and set your timeing then shut it down and re connect the connector

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post #4 of (permalink) Old 02-12-2001, 09:09 PM
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Re: How to set timing on a tbi motor?

on the passenger side, under the dash, is a taped cluster of wires. the aldl connector is there. Disconnect it. Then, start the truck, and adjust the timing. The check engine light will come on, just disconnect the negative cable, and it will clear out. Reconnect the ALDL connector before restarting the engine. I wouldn't go over 2+ degrees, it will ping unless you put 92 octane in it. If you put an aftermarket chip in it, it will ping worse.


post #5 of (permalink) Old 02-12-2001, 10:39 PM
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Re: How to set timing on a tbi motor?

The decal under the hood says to disconnect the brown wire from the loom near the Dist (mine is between the dist and master cylinder)...unplug it...start the truck, set the timing...shut it off, and reconnect...should be pretty simple once ya get to pokin' 'round...JD

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