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KA24Tech · Feb 23rd, 2005, 02:05 AM

The 95 Altima is an OBD II equipped vehicle. Take it Auto Zone or similar stores to have them connect the code scanner and read the codes for free. Sometimes there are codes stored that do not trigger the Check Engine Light.
Also the fuel filter should be new and try purchasing the Haynes manual (~$12.99) or the factory service manual (~$75) for the Altima. I also recommend check the fuel injectors by putting the flat end of a large screwdriver on each injector with it running and the butt end next to your ear when it is running. Listen for a ticking on each one and then compare the sounds to the others if one sounds different or has no sound at all then it should be tested electrically. The injector has a resistance of between 10 and 14 ohms as measured with the harness disconnected.
The fuel pressure should also be checked with a gauge in line or the quick way by unplugging the vacuum hose from the fuel pressure regulator and plugging that at the end of the fuel rail. The fuel pressure should read ~ 43 psi.
The Mass Air Flow meter can also be check by starting the vehicle and then unplugging it if it dies then it is probably working correctly, if not then it has a problem. The voltage on the sensor as measured at the no. 1 terminal (far laft will be less than 1 volt with the key on but not running. Then 1 - 1.7 volts with it running and warm. From idle to 4000 rpm the voltage rises in a linear rate to ~ 4 volts.

Troy

Feb 23rd, 2005, 02:05 AM	#6 (permalink)
KA24Tech Biru O' Kudasai Join Date: Feb 2004 Location: Golden CO Posts: 1,426	The 95 Altima is an OBD II equipped vehicle. Take it Auto Zone or similar stores to have them connect the code scanner and read the codes for free. Sometimes there are codes stored that do not trigger the Check Engine Light. Also the fuel filter should be new and try purchasing the Haynes manual (~$12.99) or the factory service manual (~$75) for the Altima. I also recommend check the fuel injectors by putting the flat end of a large screwdriver on each injector with it running and the butt end next to your ear when it is running. Listen for a ticking on each one and then compare the sounds to the others if one sounds different or has no sound at all then it should be tested electrically. The injector has a resistance of between 10 and 14 ohms as measured with the harness disconnected. The fuel pressure should also be checked with a gauge in line or the quick way by unplugging the vacuum hose from the fuel pressure regulator and plugging that at the end of the fuel rail. The fuel pressure should read ~ 43 psi. The Mass Air Flow meter can also be check by starting the vehicle and then unplugging it if it dies then it is probably working correctly, if not then it has a problem. The voltage on the sensor as measured at the no. 1 terminal (far laft will be less than 1 volt with the key on but not running. Then 1 - 1.7 volts with it running and warm. From idle to 4000 rpm the voltage rises in a linear rate to ~ 4 volts. Troy __________________ SHIFT_Happiness 1992 S13 240SX SE Fastback KA24DE 5 spd - Type X Aero & Seibon Carbon Hood & Hatch -soon GT28RS 1993 U13 Altima SE KA24DET 5 spd w/ Nismo LSD - A high hp FWD can be fun (GT30R Turbo inside) 1990 Z32 300ZX VG30DETT 5 spd - 600HP & Very Civilized (working on twin GT28RS turbos) Still trying to import a 1988 R31 Skyline GTS-R w/ RB20DET-R - only 800 produced (legal under show/display regs)