Mechanics

WHY DO I HAVE POWER LOSS AT 3000 RPM ONLY?

1999 Infiniti G20 • 160,000 miles

New Plugs, New Plug Wires, New Front and rear O2 sensor.
Replaced MAF, Cap, Rotor.
Had P0301 Code and rough Idle at take off. This was fixed by cleaning EGR.
No codes now, only the following, issue that can be created.
Speed up to 2800-3000 RPM and let foot off gas pedal, then If I excellerate, it then seems that gas is cut off at this point, will only speed up IF downshift occurs.

This also seems to happen when in second (2) at 4500 RPM.?

Steve
Avatar
Steve099
September 30, 2011.



Maybe fuel pressure have that checked

Docfixit
Sep 30, 2011.
I will Check that, but when this happens I can put in neutral and rev to 7000 rmp not issues, Also injectors sound like the are all fine.

Tiny
Steve099
Oct 1, 2011.
Pressure 34 psi vacuum connected at idle 43 psi vacuum disconnected

Docfixit
Oct 1, 2011.