Sup guys! Let me tell you about this problem that i'm having with my accord. The car's had a starting issue for a long time, sometimes i had to hold the keys turned for up to 5 seconds until it finally started. Recently, i stopped by a gas station and put 15 liters of gas, the gas station was running out of gas, the pump was slow, it's possible that dirt that sits at the bottom of their tanks was pumped into my gas tank, now... i know the pumps have filters too, pre-filters and all... but, i'm not so certain that they work 100%.
Anyway, later that same day, the car started to drive funny, rpms would starting dropping, this symptom was followed by a backfire, the engine at times sounded really funny, i can only describe it as a sound like something was really messed up. Most of the time, when this symptom showed, the car would continue to work fine right after the backfire. It happened everytime i went over a speed bump, or taking off from a stop, a few times happened while driving. Next day, i filled half of the tank up with gas at another gas station. I thought the issue could be related with the fuel pump, i dropped the tank and replaced the fuel pump with my walbro 255 off my old CD5. The car worked fine for a good 5km, then... a slight rpm drop, it almost stalled after that. Next day, car wouldn't even start. It takes probably 20 tries till it finally fires up, but now, the issue has finally hit the fan, car won't start anymore. I checked for spark, took the cable and a screw driver near a ground, saw that i have spark. What could be the problem? I need some help here, could the fuel pressure regulator be doing this? Fuel filter could be bad to the point where a car wouldn't fire up anymore?

Please help a brother out! Thanks in advance.

 

Going to check resistances of injectors, TPS, coil and etc again.

Any ideas?

 

Every resistance checked was ok. I picked up a fuel filter for big cars like s-10, blazer and etc, will make the necessary modifications as soon as possible, the accord was priced at 78 bucks at one store, 94 at another. I can't pay that much for just a filter.