BigBS

I would expect that if the car would start, then die from lack of fuel, but my ECU will not provide ground to the fuel pump relay long enough for the pump to start.

Just to be clear, the pump isn't even starting. The pump runs just fine when it gets power. The issue is that the ECM does not provide ground for more than the blink of an eye.

My pump won't even start in the moment that it has ground. After power cycling the ECU, it will usually run for at least a few seconds. I believe this is to achieve a certain pressure in the injection system. i'm not sure on the roll over sensor. As far as my wife knows, I've never rolled it.

Took forever for me to get off my @ss and look at the car again. Seems like the issue is the ground signal from the ECU. I have good power to the relay, but the ECU ground is only present for less than a second after the key is switched to run. After pulling the positive from the battery for a while, I sometimes get the fuel pump to run for several seconds. The first time I thought it was fixed, as it started, and I let it run for several minutes. After shutting it down, it was back to the same issue (no power to the fuel pump). Any ideas what could cause the ECU to not send the ground signal? Thanks BS

I never had any problems with starting until the other day. Drove to work without a problem. Went to leave, and the car turns over, has spark, but won't start. I pulled the cover in the cargo area, and have tested the voltage to the pump as the key is put into the run position. I get about 12 volts for a second, then I hear a click (relay I guess), and the voltage drops to zero. I pulled the relay out of it's holder, and popped it off. Took another relay from some other circuit, and put it in place of the original. Does the same as with the original relay. I thought I read somewhere that the ECU might need to be reset in order to get power to the relay again. Is this the case? If so, what is the process? Otherwise, any help would be appreciated. BS