Posted by jimg.allentown on August 11, 2017 at 19:43:21 from (173.49.133.204):
In Reply to: fuel pressure ? posted by olgentdc on August 11, 2017 at 19:04:53:
Fuel pressure is a nominal 52 psi across the injectors. This is regulated by the fuel pressure regulator located in the fuel rail. Normal should read about 38 to 50 on a gauge. At idle, about 37 to 40 psi which is gauge pressure plus the 14.7 psi nominal atmospheric pressure. Your fuel pressure is correct. If it is unresponsive, it is most likely a different problem. Like a plugged exhaust. Since it is an OBD2 vehicle, a scan should reveal at least the major problems. I would suggest starting with a vacuum gauge, and see what the vacuum is at idle. Should read in the vicinity of 27 to 30 inches of mercury. Then crack the throttle and see where it goes. At a slight throttle opening, it should increase slightly, and then go back to the reading you had at idle. If it rises all the way to 10 inches or less, you have a plugged exhaust.
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