if the engine is removed from vehicle you need to remove the intake, the valve covers, the rocker arms, pushrods, and lifters; then you remove the timing cover, then line up the marks on the sprockets by turning the engine over by hand, then remove the cam and crank sprockets and timing chain; then pull out the cam and install the new one; line up the marks on the sprockets and reinstall them turning the cam if necessary; reverse the rest of the procedure.
there should be little dots on the crank and cam gears.... just line them up when you put the cam and the timing chain on and you should be good. the cam gear you cant screw up because it has a dowel the goes into the cam gear and the crank is keyed so it gets pressed on the right spot... very easy
cam timing will not change ignition timing i would try 8 or 10 degees advance at idle with the vacuum advance disconnected.
The timing stays the same. The only thing that changes the timing is when you change the CAM SHAFT.
Are you sure that the timing is right? if so then maybe the cam position sensor was damaged during install
maybe check for a worn CAM LOB.
Why would you have to install new gears? They are actually cogged sprockets. It depends if you have a single overhead cam or dual overhead cam engine. All assecory belts need to be removed and front right engine mount. Remove crankshaft pulley with applicable puller. Remove timing cover. Loosen timing belt tensioner. Align all cam and crank marks install belt and tighten and re assemble. Not a job you want to do under a shade tree!
Cam timing you line up the dots on your crank and cam gears. Ignition, put #1 at TDC on compression stoke. With cap off distributor, turn rotor so it points towards #1 cylinder. Do not drop dist onto the oil pump slot. Turn the crank counter clockwise 1 full revolution until your distributor falls down on the oil pump. Then it should fire when you re-install the cap. Adjust timing accordingly with a timing light.
If the timing marks on the crank gear and cam gear are lined up before you install the chain, you are good to go.
If a lifter is stuck in the lifter bore and won't move, it has probably ruined the cam. The procedure would be to install a new cam and lifters.
the modulator is part of the transmission, more than likely you have a problem with timing. check your base timing, firing order, check your advance.
Depends on the cam.
Right side of the engine behind the cam cover.