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Old 04-26-2010, 04:24 PM
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chevy 350 tbi timing??

i have a 1990 chevy k1500 with a 350 TBI, what would be a good timing set for it? i know nothin about TBI motors, when i bought it it had a bad skip, so i looked at the rotor and cap, they both needed to be replaced, so i did and still nothin, i checked the timing and it was way too high, it wasn t even readin on the scale, so i pulled it back down to 30 degrees total, now pulln the mountain sometimes it hesitates, but not all the time! any opinions?

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Old 04-26-2010, 05:29 PM
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Base timing with the wire unplugged is 0 or top dead center. Next shut the truck down, disconnect the battery terminal for over a minute. Reconnect timing wire, reconnect battery terminal and start. The computer will next set up the timing scale. Disconnecting the battery makes the computer dump the former timing so it can set it up new again.
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Old 04-27-2010, 04:58 AM
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I agree, but the factory 0 degrees of timing is too retarded. You can run it around 6 degrees advanced and it will wake it up quite a bit. As Doublevision stated, you must disconnect a specific wire (I think called the esc connector?). That's why it appeared way off when you timed it. The computer has a preset timing curve-you are just setting the base timing that the computer works off of-it has no idea where the base timing is set at. This will then set a code and you will have to unhook battery to clear the code. Then you hook up the connector and the battery and you're good.
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