i have a 96 civic hb. the 96 engine crapped out so i changed the engine with a 98 lx engine. both were non-Vtec. now the car refuses to start. checked the timeing over a hundred times, replaced the distributor, replaced the computer and still nothing. spark plugs are new, compression is good, its getting fuel but it seem to have inconsistent spark. it will crank on then shut off.