How to find timing when installing timing belt to mazda protege?

Watch the video for goddness sake. Joes Garage 383 Engine Rebuild Part 4 Timing Chain installation

If by timing you mean that you aren't sure that you have the belt on the cam/crank assemblies properly, now is a bad time to mention it. This is an interference engine. Proper alignment of the crank/cam with the timing belt is critical and must be exact or serious internal engine damage will result. Even turning the engine too far without the belt properly aligned can damage pistons and valves. At this point if you didn't get it right, the damage is probably already done. For a quick check, disable the fuel pump, pull the spark plugs and perform a compression check. If it doesn't pass, take it all apart and assess the damage and repair as necessary.

have you had the OBD codes read , if not i'd have that done , note the codes , if any , clear them, as claering the codes can sometimes be all that needs doing , if no change post the codes and will be able to locate the sensor/switch causing the issue , another thing to check would be the compression in that cylinder , if low then investigate from there ie valves , head gasket etc

Losen the belt with the tensioner and you should be able to take it off with a couple of wrenches or sicket...note some tensioners come as a unit..where you remove the mounting bolts and replace it with a new one good luck..

1. Remove the coolant overflow bottle.
2. Remove the battery.
3. Loosen the pulley bolts.
4. Loosen or remove the drive belt.
5. Remove pulley bolts
6. Remove all studs and bolts from old water pump.
7. Pull old pump off. Use a screwdriver to start it but be careful not to bend the old pump. Also, tapping the center of the pulley lightly with a hammer may help loosen it. If it is hard to get out, check and make sure all bolts are removed. When you remove the pump, there will not be enough room to remove the pulley drum from the pump. This is important to remember when installing the new water pump.
8. Scrape area off with a gasket scraper and razor blade to remove old gasket. Make sure its clean! Spray it with brake cleaner and wipe clean afterward.
9. Spray both sides of the new gasket with high tack. High tack works much better than the goop because it is clean, even, and seals well.
10. Slip gasket in carefully and be sure it fits properly over bolts and is in correct placement against block. Press down to ensure seal.
11. Spray the inside of the water pump with high tack evenly.
12. Install water pump into correct place against block making sure that pulley drum is already hanging from new pump or you will not get it on afterward!
13. Install bolts and studs and tighten down.
14. Install pulley screws and tighten as best you can.
15. Reinstall and tighten drive belt.
16. Finish tightening pulley bolts.
17. Reinstall battery and coolant overflow bottle being sure that bottle is empty.
18. Let sealant dry overnight.

^if you follow the book and have little experience that is the best way
I have 11 years experience working on cars and 4 years were at a cadillac dealer

This will give you more hand room I Take the 2 nuts off the bottom of the front motor mount and back motor mount, on the passenger side then I jack up the motor on the passenger side end of the oil pan with a board between the jack and the oil pan. You can jack it up a couple of inches, it gives you plenty of room. I leave it jacked up until I'm done, even putting the belt on is alot easier. Then lower the motor, and put the nuts back on the mounts

If you are talking about one you purchased return it and look at another one. If you are looking for one on the engine they may have used liquid gasket.

What type of car.

You will have to look at the camshaft gear and crank shaft gear there will be mark in side the timing case where the mark have to align up with the mark on the gears

Go to autozone dot com and make a free account, put in the vehilce info and look for the free guides, if they are not online, go to a store and see if they have CHILTONS or HAYNES manuals on it.