1995 Nissan Maxima gas problem

Tiny
RAMONDO
  • MEMBER
  • 1995 NISSAN MAXIMA
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 80,000 MILES
80,000 when I step on gas pedal a little heav it seems to buck and bog down if I exceleraye very slowley I can get it 60 mph but no more it wll bog down. Please help
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Tuesday, February 16th, 2010 AT 9:19 AM

3 Replies

Tiny
MATHIASO
  • MEMBER
Hello ramondo

Start with inspecting the electrical condition of the fuel pump.

Perform the following procedure:
a. Turn the ignition switch OFF .

b. Unplug the fuel pump electrical connector.

c. Using an ohmmeter, set on the lowest scale, connect the probes to terminals a and c ,the resistance should approximately be 0 Ohms. if not within specifications, the fuel pump may be faulty.

d. If the fuel pump resistance is OK, plug in the fuel pump electrical connector.

Release the fuel pressure. Connect a fuel pressure gauge between the fuel filter outlet and fuel feed tube


http://www.2carpros.com/forum/automotive_pictures/46384_0900c152800ada5b_3.jpg


Connecting a pressure gauge between the fuel filter outlet and the fuel rail inlet tube will allow an accurate reading of the fuel pressure.

1995-98 models: 34 psi (235 kPa)-At idle, fuel pressure regulator vacuum hose connected

Make sure the fuel filter is not blocked before replacing any fuel system components.

Stop the engine. Disconnect the fuel pressure regulator vacuum hose from the intake manifold and plug the intake manifold opening.

Using a variable vacuum source, connect it to the fuel pressure regulator.

Start the engine and read the fuel pressure gauge as the vacuum is changed.

If pressure is not as specified, replace the pressure regulator and repeat the test. If the pressure is still incorrect, check for clogged or deformed fuel lines, then replace the fuel pump.
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Tuesday, February 16th, 2010 AT 10:24 AM
Tiny
RAMONDO
  • MEMBER
Dear car pro I screwed up on a few tech items the milage is 140000 and the engine is a v 6 not v 4. I noticed when in lower gear it acs up much more if u can try one moer time I would greately app it thank you so much rw.
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Thursday, February 18th, 2010 AT 12:25 PM
Tiny
MATHIASO
  • MEMBER
Hello ramondo

I screwed up too to tell you that there is no nissan maxima 4 cylinders, there is only 95, 3.0L SFI DOHC 6cyl. And the procedure for diagnosing the fuel pump I wrote is correct. The mileage is not important.
Start with inspecting the electrical condition of the fuel pump.

Perform the following procedure:
a. Turn the ignition switch OFF.

B. Unplug the fuel pump electrical connector.

C. Using an ohmmeter, set on the lowest scale, connect the probes to terminals a and c, the resistance should approximately be 0 Ohms. If not within specifications, the fuel pump may be faulty.

D. If the fuel pump resistance is OK, plug in the fuel pump electrical connector.

Release the fuel pressure. Connect a fuel pressure gauge between the fuel filter outlet and fuel feed tube

let me know what you found.
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Friday, February 19th, 2010 AT 12:45 AM

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