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Generic problem for all Chevrolet Astro Cars

Removed distributor to change head gas...




By graysteel1 on May 07, 2009

" "
removed distributor to replace head gasket, now can not get timing right

Clarification Request

Posted by scspriggs on May 07, 2009

This is a nightmare. I think I would get a repair manual. Don't know much about that engine. It's possible that the distributor is just 180 degress out of phase. Take it out, turn it 180 degrees and reinstall.

Same Problem

May 07, 2009

-   have the book in fact 2 . tried turning 180 but will still not run right. turned distributor 90 degrees and the engine runs but no high speed lots of sputtering and misfires. -   Guest

Best Solution

posted on May 07, 2009
Very Helpful)

Dudeman321

Rank: Guru 
Rating: 92%, 117 votes
If the timing chain is still in the correct position its an easy fix. Put screwdriver down spark plug hole #1 and rotate the engine over by hand until you reach TDC e.g. piston fully up. Now your either on the start of the ignition/power stroke or at the end of the exhaust stroke. Im not sure of the firing order of your specific engine but basicly this means that the engine is either firing on 1 at TDC or its firing on its other piston. Just put the screw driver down the other cylinders and find the other piston thats at TDC. Put the distributor back in so that the rotor button lines up roughly with the post on the cap that lines up with one. Put the cap back on and try and start it. If it almost starts just trim up the cap a little (twist it by a few degree either way) If it sounds way out then pull the distributor back out and line it up with its mate piston.
Hope this helps
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Solution #2

posted on May 16, 2009
Very Helpful)

guavajim

Rank: Apprentice 
Rating: 100%, 1 votes
On some 4.3 engines, when the timing marks line up, the #4 cylinder is the TDC. So you may have to point your distributor to #4. And look at your cap, sometimes, where the #4 wire joins the cap, the wire "inside" the cap may run to the other side of the cap, so look inside to see exactly where your rotor should be pointing.
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