Originally Posted by 2013GV
I have grafted aftermarket fuel pressure regulators onto rails before, takes a bit of work but can be cheaper than the whole rail.
anyway, check pressures (inline gauge, no schrader on most cars these days, they leak..... and watch for leakdown rates as well, I wouldn't immediately suspect your regulator as those things are silent, but fuel flow pulses from a faulty pump can cause noise. Without testing i'm just guessing at possibles. Noisy regulators are a rare thing, you are honored heheh.
45 psi running at idle is about normal, manual says 43, but most gauges can be a couple of psi out and so can the regulators. above 40 and under 50 indicates a reasonable condition fuel system and shouldn't prevent starting.
prime should charge rail, pressure should hold for 30 seconds, and immediately come up when cranking (pump starts as soon as cranking is detected) Could hit 50 psi until car is running as no vac to control pressure.
If pressures not up, or its dropping off, disconnect vac line from the regulator and see if theres any change. low pressure with drop off usually is a pump. The regulators don't seem to give much problem on these things from my experience.
Thank yall for yalls response. yeah, the only regulator i saw was connected to the fuel rail so i was wondering if that was the case. the noise is coming from it forsure. i havent checked the pressure yet. since it wont start will it still give me those readings just trying to turn it over?
also i disconnected the line from the fuel filter (the one leading to the engine) and turned the key so the pump kicked on and there was a steady strong flow of gas coming out of the filter. if that tells you anything about the streangth of the pump. i will get a gauge and check the pressure as soon as i can. i also just got my obd2 scanner in the mail the codes are
p0171- system too lean bank 1
P0404- gas recirculation control circuit range/ preformance
P1449- refer to vehicle service manuel.. which says
Evaporative Emission System Vent Shut OFF Valve Malfunction
P0302- cylinder 2 misfire
P0102- Mass or volume airflow circuit low
been trying to connect them together or figure out which one would cause it not to start
side note. it does not have a gas cap on it so that is possibly the reason for the P1449