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Timing is off on my 4.3 vortec engine....to get it back do I pull distrbuter and get #1 cylinder to top and re set the distributer? Where is number 1 cylinder?

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If it is far Enough to notice, Your Timing Chain Has STRETCHED and Needs Replaced. There is NO Normal Settings to the Timing that Would Require REMOVAL of DISTRIBITOR.

Posted on Sep 08, 2009

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How do set time on 99 chevy blazer vortec v6 4.3


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Took distributer out and changed dist rotor and dist cap. Put ne spark plugs and wires. Now wont start and backfires while trying to start.


You have the Engine Out Of Time you will have to bring number 1 cylinder to Top dead center do this by turning the Crank bolt Clockwise Have the valve cover off so you can watch the Intake and Exhaust Valve`s open and close as number one piston comes up on a firing stroke make sure you have the number one cylinder coming up on a firing stroke. Watch Intake valve open and close as you turn the Crank.when pisten gets dead top of this STROKE DROP THE DISTRIBUTER; Start the Firing Order right where the Rotery Button is inside the Distributer cap

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I have a code misfire cylinder 5 and I am not sure where cylinder 5 is on my engine and it runs like **** and when i give it gas Service engine soon light comes on. specs: 2000 v8 8.1 litre gas Vortec 8100...


Cylinder numbering for your engine is 1-3-5-7 on the left hand bank and 2-4-6-8 on the right hand bank (passenger side). To be sure where number 1 is look across the cylinder heads number 1 cylinder is always the head that is furthest ahead towards the front of the vehiclek, then count 3 cylinders back on that side, should be left, and that should be number 5. pull the spark plug first and check it and at the same time pull number 3 's plug and swap the coils from 5 to 3. If the plugs are bad replace them all. Then run the vehicle and see if the misfire code followed the coil to number 3, if it does you know you have a bad coil, they usually run about 90 - 100 bucks each, that is if the plugs or wire wasn't the problem. hope this will help you. good luck.

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Just replaced engine in my 97 its a vortec brought it to tdc put in distributar it turns over and tries to start but wont i turn it just a little it acts better but i cant move it far enough


take the spark plug out of the #1 cylinder and turn the engine by hand until the piston is at the top dead center of its stroke (put a screw driver in the hole and you should be able to tell when its all the way up). now pull the cap off the distributer the rotor should be pointing at the #1 cylinder wire. if not then the distributer is in the wrong possition. remove the distributer and point the rotor in the correct possition(#1 cylinder) and place the distributer back in.also if this is a used engine replace the cap,rotor plugs and wires.the truck should start. Hope this helps you out.

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Just put new timing kit on 95 gmc sonoma 2.2liter and lined marks up. truck still wont start. do i need to put number 1 cylinder on tdc before i start the truck. when trying to start it backfired a little.


click the ignition so #1 cylinder is at top dead center then pull youre distributer cap off make sure the rotor is pointing towards # 1 cylinder if not you re timing is 180 deg off pull the distributer out a little and turn the rotor to # 1 cyl you probaly dont have the timing marks lined up correct if the timing is off it will back fire either out the air filter or exhaulst ..

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4.3 L vortec firing orcer and wiring diagram


you need the firing order?? it is 1, 6, 5, 4, 3, 2 clockwise. Number one on cap is forward position, or 6 o'clock position, just left of the hold down bolt.

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