Ok there two timing marks on the harmonic ballancer the number on cylinder plug out it blows on the the first and through the second mark distributer yes i know how to set it it will not crank on the first mark i set it on the second mark it started.
i drove it it was good second day i drove it check engine light came on and bad slow acceleration if the first mark is the timing mark how do you get it to zero there what is this timing advance wire i have read about is there one on a 99 if so where it is retarded 17 degrees and the computer takes over but still runs slow and some slight chatter valves so timing is definately off ot could the throttle body sensors be bad
confirm first mark or second mark or can it go in between the two and set cap to 6
On all 1993 and later GM 4.3L engines the timing mark is on the plastic timing chain cover.(a small notch) it's about in the 1 oclock position above the balancer. If your balancer has 2 marks.. from the clockwise rotation, ignor the first mark. TDC "top dead center" is the second mark on the balancer. Just remember. All 4 stroke engines, the crank turns twice the RPM as the cam/distributor. The distributor could still be 180 off if TDC is not determind on the compression stroke of # 1 cylinder.
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The timing marks are on the front harmonic balancer Locate the one cylinder if on firewall side then use number 4 front middle remove spark plug cut a coat hanger and slide down spark plug hole DO NOT START ENGINE rotate crankshaft with socket wrench watching coat hanger until it can not go any higher and not bending by getting stuck against cylinder wall. This will be TDC now you can see if reference mark on crank pulley aligns with pointer mark with fingernail polish so easily can be seen with timing light.
You might not have #1 at tdc on the COMPRESSION stroke. You're trying to get it to tdc the hard way. Take #1 plug out and have someone bump the starter while you hold your thumb over the plug hole. You'll know when its a tdc cause it'll blow your thumb off. When youve got it close, turn the crank to absolute tdc using the timing marks on the harmonic balancer. Take the distributor out and pull the cap off. Then turn the distributor rotor to point at the #1 plug on the distributor cap. Put the distributor back in and put the cap back on. Make sure that the oil pump slot lines up right, as the distributor won't sit flush until its right. If its not lined up, take a long flathead screwdriver and turn the oil pump to make the two line up. Last, make sure the wires are on the right plugs on the cap using the firing order cast into the intake manifold. Remember that the rotor turns COUNTER clockwise.
its real simple on the harmonic balancer the outer ring has a line in it on the front of engine there is a timing tab that hangs over the harmonic balancer line up the line with the correct timing degree 4 6 or 8 but to check for compression stroke number 1 piston has to be up and both valves have to be closed hold your finger over the number 1 spark plug hole and have someone tap the key till air blows your finger off the hole line up timing mark on balancer it should be close now you could use a socket on balancer bolt now drop in distributor lining up rotor with the number 1 spark plug wire rotor should point towards number 1 spark plug on engine driver side front distributor wont be all the way down because it has to drop into oil pump shaft just turn engine over with a ratchet on harmonic balancer bolt one or two revolutions and distributor will drop right in to oil pump then install retainer and bolt for distributor then use a timing light while engine cranks to get timing close to start it then time it correctly after it starts
take distributor cap off turn engine over so u can work out which way the rotor arm spins.then turn engine over manually till u lign up timing mark on crank pulley roto shld now point to number 1.firing order is 1 3 4 2 making sure u do this cobination the way the rotor turns when engine is tiurning over
You have to make sure the # 1 cylinder is at top dead centre on the compression stroke remove the spark plug on the very front cylinder on the drivers side and rotate the engine by hand and when you can feel the air come out you will know its on the compression sroke on #1 ...Now look at the timing marks on the crankshafts harmonic ballancer pulley there are 2 allignment marks line them up with the 2 marks on the cover..set the distributor so the rotor pionts to #1 on the cap..Remember the cap is like a circut board so #1 may not point forward but possibly towards the passenger side a bit..Disconnect the timing connector in the harness tan and black wire..start the truck and set timing to 0 degrees with a timing light.. o degrees is the larger v mark on the cover.. tighten the dist bolt and then shut off engine and reconnect the timing connector and your done...good luck
on your harmonic ballancer,sound like your pointer is missing,When you look down at your Harmonic balancer there should be something about it that you see that looks kinda like saw teeth with numbers in the gaps. The zero or line whichever year you have should be on the Harmonic balancer
remove and plug vacume line on the distributer and find timing specs on the motor in the vehicle using timing light hook transducer cable to no# 1 cylinder set the idle to manufacturers specs make shure motor is warmed up to operating temp now point thr timing light at the timing plate on crankshaft pulley start the engine and watch for the mark on the harmonic pulley see where it is at when running now if the mark is not lining up with sugested degrees from manufacturer then u must loosen bolt on distributer only loosen 1/4 turn now rotate distributer clockwise or counterclockwise this will make the mark on the harmonic ballancer allign with manufactures required timing specs after aligning marks tighten distributer and unplug distributer vacume line and plug it back into distributer. and test if u need anymore specifics plz read manual carefully good luck