So i bought a walbro 255 that was out of a crx. I put it in my 93 honda civic. well it fit alright and works good but i advanced my timing all the way just to see what would happen and it was running alright and around half a tank it would almost seem like it was running out of fuel but it was still letting me go. its kinda hard to explain. when i was putting the pump in the filter on the pump was smaller than the one on my factory fuel pump. can anyone help me please.