Let me walk you thru a minor timing training lesson here. The crank shaft will come to the tdc location twice during a cycle. Once is to compress the fuel and air. The second is to push out the exhaust fumes to the tail pipe. The crank shaft does not know if you are on either stroke it only knows #1 piston is at its top height possible! The cam however it does know and truly needs to know. At TDC on one stroke it must have both intake and exhaust valves completely closed (piston cylinder sealed ) This is what Is needed for the remaining valve etc to fire correctly. The cam on the vext point the piston reaches the top (tdc) will now be pushing down on a valve (exhaust). This completed One of 4, 6, or 8 cycles this engine will do. All the other pistons will have done identically the same thing before that 1st piston (often called Number one cylinder). On an overhead cam engine there were marks that the factory installed for the mechanic to align the cam and crankshaft correctly. These marks are crucial to be right. It is not easy to see these most times once the engine is assembled. As an example Most engines (not all) will have a mark such as an arrow or dot on the cam pullet that points straight to a raised pointer on the head or at an arrow on the gear or pulley (mark) . any point not correct causes timing to be off some degrees. Your computer would find this nearly impossible to correct for. Now I have doubt the marks are wrong. I think perhaps the computer needs to be reset for the changes but it is possible the engine has some other issues need checked.

The harmonic balancer has a keyway so it CAN'T be in the wrong position. However, the timing certainly can be off. Knowing the type of vehicle and engine would be REALLY helpful. Older vehicles can be set really closely without a timing light. Give more details, make, year, engine...

If all the fan belts (serpentine) lined up, the vibration damper is right on the money. There is not any adjustment unless you removed the key-way.

I suspect your timing is out of wack. Always remove Vac line from distributor & plug when setting timing.

Go back and make sure the cam timing is right on the money. You might have caused to belt to slip against the belt tensioner turning it backwards.

I was in the middle of doing d.I.y. timing belt and since I'm noob I used torque wrench instead of impact wrench which just spun it instead of loosens it. I realized that my tdc was off but luckily I marked where it was. Before I could repair what I've done my parents took my car to shop even though haven't marked timing points. Now my car feels really really sluggish like no joke. It runs smooth and almost like new however my car has a few minor bolt on mods and I don't feel the extra power I used to. I'm considering redoing the timing job and adjusting the harmonic balancer pulley to correct point since my parents won't get it fixed. the shop they took it to was a family friend ????

Any thoughts or opinions from the wise? I'm noob and Have a strong desire to learn. Iv done regular maintenance like oil brakes and even body work I'm 21 and still learning plEase be patient