How do i know if i set the timing belt right?

http://www.manualslib.com/manual/464695/Honda-Accord.html here is 90 91 92 93 honda accord manual

Questions:
Is it a carburetor or fuel injected model?
Did the slow take off occur before or after you changed the plugs, wires, and timing belt?

If it started after plugs, wires, and timing belt, I tend to believe the timing relationship between the cam and crank has changed (cam and crank are not timed together properly, off by a tooth or two). Unfortunately you will need to partly tear into it again to verify the timing marks used when the timing belt is changed are perfectly aligned.

I hate to say it but you should of got the right part. That wiring is not to be spliced (for one, electronics)

Manual transmission? Clutch is slipping

Hello and welcome to FixYa!

If there are cracks on the timing belt then it's time for replacement. I strongly suggest that you have it replace to ensure security. After that, take note of the timing belt replacement and you need to replace it every 100K kilometers.

Hope this helps and thank you for using FixYa! Have a good one!

I assume your talking about the timing belt marks for the crank and cam,heres a diagram to help you.

Well, it is hard to explain now once installed little off point. I would suggest u to seek help from a certified Honda mechanic before ur engine stops completely with a broker camshaft.

timing may be off , NOT SET RIGHT. here is a diagram good luck and contact if you need more help.http://www.2carpros.com/car_repair_information/tec_info/1987/honda/accord/1987_honda_accord_timing_belt_diagram_marks.htm

If the timing belt is damaged(broken or missing teeth) you will get no spark. One easy way to tell is that many times the engine will sound different as it turns over, than it used to.

The main relay for fuelpump,under dashboard left side