I have a 98 handa acord. Sometime it will start only for a few seconds and then quite. I have to try two or three times before it will stay running and know it died on my going down the road but it did start after three or four try. Can anyone help?

I would replace the Ignition Control Module and coil:

https://www.askmehelpdesk.com/cars-t...tml#post265896

It only dose it when it get hot. Do you think it could be the main relay?

It's very possible. Try resoldering or replacing the main relay first. If the problem persists, replace the ICM and coil. If you have the money and want "like new" performance and reliability, then replace all three items. I normally recommend every 10 years or 120,000 miles, whichever comes first, to replace these items automatically. Most AutoZone stores, however, can test ICMs and coils for free.