i have a 1990 civic si. i got it for free from a neighbor and replaced the fuel pump and filter, main relay and changed the oil. After i replaced the pump it ran for about 4 days and then i went out to start it and it only cranks. Please help me!

 

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When the key is turned from off to ON(II), does the fuel pump prime?

Is there spark at all four spark plugs?

Any CEL codes?

 

it could be spark or dizzy could have just failed after a few days.

 

need to be a bit more discriptive with your thread to get accurate help

 

check your battery, had my car sitting for a bit because exhaust was broken, when put back together, it would crank, but not start. I tried to jump it, but it didn't help. Voltage was only 11.5 on battery so I got a new battery (old one was three years old) . The car started right up with the new battery! Hope this helps!