Hi folks,
I get this cyclic moaning/vibrating sound (sounds like a complaining cow) that comes on whenever I am idling and it seems to be coming from the back of the car but I am not for certain. Noise disapears completly if the RPM's are above Idle even when sitting stationary. When the sound comes on and I am touching the Fuel Regulator, I feel a vibration at this location. Therefore the noise seems to be a part of the fuel deliv. sys.
Question: How would I diagnose if the pump in tank or on the chassis were bad or if the regulator that is bad causing the noise to start? PS Pulling off the vac line on the reg. shows no sign of leaking fuel.
Thanks in advance,
Tim
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