Question about 1999 Chevrolet K1500

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2001 astro chevy van 4.3 engines need to set the timing

2001 astro chey van 4.3 engines need to set the timing don't mark the points.

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  • Ronnie Wilson May 11, 2010

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The distributor in that engine can only be installed in one position. The hold down is built onto the distributor meaning when it is installed and the engine runs the computer is responsible for the timing. The distributor will move a little but won't correct major timing errors.

Posted on Sep 13, 2009

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While driving a 96 chevy astro mini van I heard a popping sound and then the engine cut off and won't start again. When you try and start it the engine shakes, why is this


Sounds like you timing has jumped. Set the balancer at the 0 mark. take the distributor cap off. The rotor button should be at #1 position or 180 degrees off that. Any other place , the timing jumped.

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Is base timing automatically set by the ecu on a 99 chevy astro van. Did a intake gasket (upper and lower) job. Now van runs like the timing is off. What's the correct advance number?


You may be one tooth off on the distributor. With the cap off and battery disconnected rotate the engine to the small timing mark in the crank pully. There should be a small line in the pully and a single finger or mark on the timing cover. Now look at the distributor. The rotor should be in line with the 6 molded into the plastic. Hope this helps!! I was one off after doing intake gaskets and this is what helped me.

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I need a fire timing order for a chevy astro van v6


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To set ignition timing, ensure that engine is at operating temperature, (190 degrees or above), bypass EST (electronic spark timing) by unplugging the single tan wire with a black stripe from the distributor. Ignition timing should be set at 0 degrees or TDC (top dead center). If not, loosen distributor hold down bolt and adjust, then retighten.

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1 Answer

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