daking Posted August 17, 2015 Posted August 17, 2015 Been working on my jeep on and off, mostly done. But life keeps getting in the way.. Anyway, I'm having power issues. My fuel pressure is ~20PSI with vacuum connected, and ~22 no vacuum. Seems low, right? I changed the diaphragm on the rail, same results. There is no ballast in line, direct wired. I'm thinking the fuel pump. Just looking for ideas before I order another pump.
Marine1Texas Posted August 17, 2015 Posted August 17, 2015 check the fuel filter as well! Check hoses in the fuel tank I had a pin hole once that cause low pressure. I would change fuel pump and the fuel filter. make sure to put all the new hoses in the tank when putting the fuel pump on.
Strokermjcomanche Posted August 17, 2015 Posted August 17, 2015 Make sure the pressure gauge is not faulty by trying another one if you rented one from a parts store or clean the ground behind the left tail light .
Knucklehead97 Posted August 19, 2015 Posted August 19, 2015 If you get a new pump there is a writeup I did in the DIY section on how to make the Bosch pump work. It's listed for Renix MJ's but requires some modding to the sending unit to fit. Also, no instructions included on how to assemble it. Go figure.
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