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I had the same code failure on my 97.5 altima three months ago.
I suspect your spark plug wires or injector not working, here is the flow
I created from reading Nissan service manual after my plug misfired.
easy to test:
- while car running, put long thin flat screw driver on each
injector and hear clicking sound and compare to other injectors.
- check for hissing sound for vacuum related at vacuum hoses
for cracks, bulge, disconnected hose
- check for exhause blockage, smoke and its color and odor
- attach a timing light and make sure it fires on every
spark plug wire.
- let it cooldown car overnight. and when car is cold:
- check and compare ignition wire resistance, 4.15 - 5.61Kohm
- check and compare spark plug resisitance
- check injecor resisstance(if no clicking heard on the injector
when car running), 10 - 14ohm
- check EGR resistance and voltage levels
more involved, longer time to test:
- warm up the car fully
- diconnect hose at fuel pressure regulator EC12, and attach
vacuum gauge at the hose, leave FPR port floating. Start
the car and see reading
- spary carubator clearner at every connection at intake
and exhaust manifold joints and change for idle speed.
- stop engine and connect vacuum gauge to the FPR and apply vacuum
source, plug the vacuum hose end and check operation
- while car is warmed, turn off, remove fuel pump fuse
start the car to purge fuel. Remove top filter hose and insert
fuel pressure tester (can not loan the tool, have to buy it),
34 psi at idle vac hose connected at FPR, 43 psi hose disconnected
EC 157, supEC18, EC-243-247, haynes 4-3
- compression test (get loaner tool) 149 - 178 psi, difference between
cyliners 14 psi
- fuel injector volume test
- "warm up three way catalyst converter" test
- leak down test (get a loaner tool), online instructions.
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