well i have a 89 civic hatch, with a d15b jdm vtec crate engine swap in it.

sometimes when i start it it will turn over but not start, and if i wait a minute and do it a couple times then it starts. it keeps doing this off and on and its getting worse. im thinking maybe it could be a fuel filter? any help would help alot

im not throwing any CELs

also my car is burning alot of fuel im getting like 15mpg but my car still is running really strong like a brand new engine when im driving it. just burns way too much fuel and i can smell it

 

does it do it only during the day or day and night? could be the fuel pump relay usually when its hot around the dash the fuel pump relay electric board separates alittle

 

its at night and durin the day. it does it all the time and it only gets like 40 degrees here during the day

 

When was the last time you changed the fuel filter?

I would also check fuel pressure, could be a bad fuel pump or PGM-FI Main Relay, both can be intermittent and get progressively worse.94