Fuel problems - Third Generation F-Body Message Boards

ssman9 · 06-16-2009, 07:30 PM

I converted from tbi to carb on my 92 rs. I am still using the factory pump and using a mallory fpr. My problem is that when I went to adjust the pressure on the fpr, before I could get a good reading to where the pressure is sitting, fuel began coming out of the vent tubes of the carb.

I haven't started the car, the carb is a holley street avenger 670 (used ... hopefully the problem), and the pump is still the stock unit.

Any suggestions.

Thanks
Mike

five7kid · 06-17-2009, 06:19 PM

You either had too much pressure for the floats to shut off the flow, or the needle/seats are not closing properly for one reason or another.

ssman9 · 06-17-2009, 09:41 PM

I think part of it was the floats were stuck. I also pulled out the float adjuments pins and taped on the blowls. Now I was able to build pressure but only to about 3 lbs. I don't think it is a problem though my return line is leaking along with another fitting. Once I get them fixed I should be ok.
Thanks