CAR INFO

2000 Honda Civic SI COUPE
Manuel Trans (S4C)
Original Motor (D15B/D16Y8) P2P ecu
New Motor (B16A2) P2T ecu
Full stock sir exhaust


Okay so here is a background on my problem. I've looked through H/T and Google and can't find an answer.The problem started about a month ago with my d15/16 mini me when it just shut off on the highway, just lost all power and slowly died. It would crank and crank but not start, towed it home and it started right up, drove around the block and it died again.

at this point I swapped the following
1. fuel pump (itr pump now in)
2. fuel filter (aem filter brand new)

After these it started right up, drove to get pizza. wouldn't restart and had to push it home. Both the alternator and battery are also new.

At this point I opted to just do a swap so I picked up a b16a2 off a guy with 90xxxkm on it. got it in and bam no start! here are specs on the swap
1. 90xxxkm on motor and trans
2. p2t ecu
3. New alternator
4. New plugs
5. Full stock exhaust
6. stock motor with intake
7. aem fuel filter
8. using the harness which came with the motor and checked all wires
9. made all new grounds and checked connections

so after all this the car still won't start and I'm stumped. I have spark, it's getting gas, the main relay clicks 3 times from ignition to start, pump primes and it cranks flawlessly. what can this be? I've also wired the ignition to switches to rule out the ingintion switch.

please help me out ht

 

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Added to OG post , sorry new to fourms