I upgraded my stock fuel pump to a Walbro 255 pump yesterday. All went well, fit like a glove and I even soldered the connectors internaly just to be sure (the connector that shipped with it, that is).
Did the fuel filter at the same time.
I did the mod with a near empty tank, and all was well. I drove home (3 miles), then wanted to drive back to the workplace and it just stalled in the middle of the road. Pump didn't work _at all_. So no fuel. We towed it to a gas station, and I filled it up to the brim and it started right up. Drove 30 miles with it. So I assumed the pump didn't get as far to the bottom of the tank as my old one, and thought that was it.
Then today, with a 65 liter tank of petrol, I drove to the store. Trying to start it up again at the store (the car was slightly tilted, I'll give you that, 5 degrees maybe), it didn't do anything. Pump didn't do a thing. I even tried hooking it up directly to the 12v line of my subwoofer that was convieniently in the back, but nothing. The pump didn't budge. Got it towed to my parking spot, and there (on an incline) I could get the pump going again and the car started right up.
Now I'm having a major headache with this. It can't possibly be fuel starvation, I mean the tank is 90% full, I filled it last evening. The pump doesn't even go on when I put 12V on it - does it have a safety of some sort as to not pump air? Why would it not turn at all on 12v, and then suddenly work after a mile of towing? Surely the system doesn't need air bleeding as it's a continuous flow of petrol in there?
I just don't get it. Anyone who has experience with this pump? Why this is happening? I try to understand but I honestly can't.
Did the fuel filter at the same time.
I did the mod with a near empty tank, and all was well. I drove home (3 miles), then wanted to drive back to the workplace and it just stalled in the middle of the road. Pump didn't work _at all_. So no fuel. We towed it to a gas station, and I filled it up to the brim and it started right up. Drove 30 miles with it. So I assumed the pump didn't get as far to the bottom of the tank as my old one, and thought that was it.
Then today, with a 65 liter tank of petrol, I drove to the store. Trying to start it up again at the store (the car was slightly tilted, I'll give you that, 5 degrees maybe), it didn't do anything. Pump didn't do a thing. I even tried hooking it up directly to the 12v line of my subwoofer that was convieniently in the back, but nothing. The pump didn't budge. Got it towed to my parking spot, and there (on an incline) I could get the pump going again and the car started right up.
Now I'm having a major headache with this. It can't possibly be fuel starvation, I mean the tank is 90% full, I filled it last evening. The pump doesn't even go on when I put 12V on it - does it have a safety of some sort as to not pump air? Why would it not turn at all on 12v, and then suddenly work after a mile of towing? Surely the system doesn't need air bleeding as it's a continuous flow of petrol in there?
I just don't get it. Anyone who has experience with this pump? Why this is happening? I try to understand but I honestly can't.