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It all depends on what year the truck is. If it is the older version with the round distributer cap, you need a timing light. Connect the timing light to the number 1 cylinder, which is the front one on the drivers side. next you have to put the computer in base timing mode. To do this you need to locate the timing connector, which is usually located

in the passenger side under the carpet ,below the hvac unit. Unplug the connector and start the engine, then shine the timing light on the timing marks and loosen the distributor and turn it unill the marks line up .Then tighten the distributor, and reconnect the connector. If it has the flat cap , the timing is set with a scanner .

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βˆ™ 15y ago
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StinknLil Brat

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βˆ™ 3y ago
What kind of a scanner to set timing on my 98 s10, 4.3 motor
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βˆ™ 9y ago

if you look at your fan shroud on your radaitor there is a white sticker showing how to do this, it also has engine specs, and the loacation of the timing advance disconnect.Is this a full size blazer? first you want to find out what degree your timing is sopposed to be set, when you look at your harmonic balancer there should be a marker line going across it, take a white paint stick and highlight this so it is visable. right above your harmonic balancer is a degree meter, if this is a 89 350 timing should be at 0 degrees. Find your timing advance wire and disconect it, get a timing light and hook it on #1 cylinder, make sure vehicle is warmed up to operating temp and ac is off. Loosen of the distrubutor bolt just enough you can turn your dist. with your hand but made sure there is some tensoin so it wont move on it's own.Start your engine use your timing light point it at the degree meter, wherever your white line you marked is at that is where your timing is, if your timing isn't whithin specs then move your distruber slowly till the timing mark lines up where it sopposed to be. tighten dist. and check timing again to make sure therer was no movement, when your done plug your timing advance back up then start vehicle and check timing again, you shouldn't be able to see the white line anymore or the line should be far away from the degree markings, if your timing is still the same weather or not your timing advance wire is hooked up your timing advance is not working.

Get a manual on your car from the parts store or AUTOBOOKSONLINE.COM and acquaint yourself with the timing of the engine.

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βˆ™ 10y ago

The timing on a Chevy S-10 4.3l is initially set by aligning the marks on the timing belt with the camshaft and crankshaft. It is then adjusted on the fly by the vehicle's computer.

Correction, the camshaft on the 4.3 is chain driven not belt driven.

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βˆ™ 13y ago

there is none. an 01 chevy with a 4.3 has a camshaft sensor and a crankshaft sensor that send critical info to the computer, it then adjusts timing electronically.

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βˆ™ 15y ago

look at the manual

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Q: How do you set timing on a 4.3 Chevy s10 pickup?
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