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California98Civic · 03-10-2015, 11:23 PM

After another lost day to a second non-functioning fuel pressure gauge rental kit, I got to retest with a new test kit today. I think I did my first test of the fuel pressure incorrectly. The FSM does not say, but I now think I needed to be running the car when I tested the regulator. With my second new regulator installed, I ran the engine and tested. All pressure normal. Longterm fuel trim slowly returned to normal. I cannot retest the OEM regulator, but I also can't say for sure it failed the test I thought it failed. I also replaced the fuel filter, since it is maybe 4 years old and I had the assembly partly dismantled anyway.

I'm going to drive the car, with the new, more restrictive, WAI removed so I can see if the problem will return.

If the problem returns, I will know to check for vacuum line leaks too.

James

03-10-2015, 11:23 PM	#32 (permalink)
California98Civic Cyborg ECU Join Date: Mar 2011 Location: Coastal Southern California Posts: 6,299 Black and Green - '98 Honda Civic DX Coupe Team Honda 90 day: 66.42 mpg (US) Black and Red - '00 Nashbar Custom built eBike 90 day: 3671.43 mpg (US) Thanks: 2,373 Thanked 2,174 Times in 1,470 Posts	After another lost day to a second non-functioning fuel pressure gauge rental kit, I got to retest with a new test kit today. I think I did my first test of the fuel pressure incorrectly. The FSM does not say, but I now think I needed to be running the car when I tested the regulator. With my second new regulator installed, I ran the engine and tested. All pressure normal. Longterm fuel trim slowly returned to normal. I cannot retest the OEM regulator, but I also can't say for sure it failed the test I thought it failed. I also replaced the fuel filter, since it is maybe 4 years old and I had the assembly partly dismantled anyway. I'm going to drive the car, with the new, more restrictive, WAI removed so I can see if the problem will return. If the problem returns, I will know to check for vacuum line leaks too. James __________________ See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread. Last edited by California98Civic; 03-11-2015 at 12:35 AM..