Thread: Fuel Pressure

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Hello everybody I'm new but I need some help. I have a 350 HO that I have put fast fuel injection on. My tank is fed out of the top so fast told me to buy a 87 mercedes fuel pump every thing is new front to back starts good runs good for about 2:00 mins then the pressure starts droping till it gets to 0 don't no why can't find anything wrong can anybody help

Thanks

Need a little more info but, could have something in the pickup, bad regulator, bad pump, vapor lock (not likely), poor ground, fuel pump cavitation. Where are your return lines? Give us more info to help ya out.

Keith

If it works well for 2 minutes then something is changing that is causing your problem. Maybe pump is heating up and quitting, or your tank vent is not working and once it starts sucking fuel no air is coming in to let it keep flowing.

After you have the problem does it have to cool off or anything before you get that 2 minutes of good running again? I agree with Keith, need more info.

Don

Venting maybe?

vaporizing? how close is the fuel lines to the exhaust?

if the return line in the tank is too close to the p/u it may be causing aeration in the fuel and you will be sucking air might take a look at that well just a thought good luck ....ted